{"id":7506,"date":"2021-06-06T14:29:36","date_gmt":"2021-06-06T18:29:36","guid":{"rendered":"https:\/\/www.semiconsoft.com\/wp2\/?page_id=7506"},"modified":"2021-06-09T21:50:31","modified_gmt":"2021-06-10T01:50:31","slug":"spectrometer-and-thickness-measurement","status":"publish","type":"page","link":"https:\/\/www.semiconsoft.com\/wp2\/spectrometer-and-thickness-measurement\/","title":{"rendered":"Spectrometer and Thickness Measurement"},"content":{"rendered":"<div  class=\"tatsu-ryQjKulK_ tatsu-section  tatsu-bg-overlay   tatsu-clearfix\" data-title=\"\"  data-headerscheme=\"background--dark\"><div class='tatsu-section-pad clearfix' data-padding='{\"d\":\"10px 0px 30px 0px\"}' data-padding-top='10px'><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-Hke7oKdgtO\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image-none tatsu-column-effect-none  tatsu-BJ-mjYOlKO\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-text-block-wrap tatsu-ByzmiK_ltu  \"><div class=\"tatsu-text-inner tatsu-align-center  clearfix\" ><style>.tatsu-ByzmiK_ltu.tatsu-text-block-wrap .tatsu-text-inner{width: 100%;text-align: center;background-color: rgba(74,144,226,1);color: rgba(255,255,255,1) ;}.tatsu-ByzmiK_ltu.tatsu-text-block-wrap{margin: 60px 0px 30px 0px;}.tatsu-ByzmiK_ltu .tatsu-text-inner *{color: rgba(255,255,255,1) ;}.tatsu-ByzmiK_ltu.tatsu-text-block-wrap .tatsu-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 700;text-transform : none;font-size : 22px;line-height : 30px;}<\/style>\n<p style=\"text-align: center;\">SPECTROMETER SPECIFICATION\u00a0 AND THICKNESS MEASUREMENT<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-BJ-mjYOlKO.tatsu-column{width: 100%;}.tatsu-BJ-mjYOlKO.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-BJ-mjYOlKO > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-BJ-mjYOlKO > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-BJ-mjYOlKO > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-BJ-mjYOlKO > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-BJ-mjYOlKO.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-BJ-mjYOlKO.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-BJ-mjYOlKO.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><div class=\"tatsu-section-background-wrap\"><div class = \"tatsu-section-background tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-section-overlay\"><\/div><style>.tatsu-ryQjKulK_ .tatsu-section-pad{padding: 10px 0px 30px 0px;}.tatsu-ryQjKulK_ .tatsu-section-offset-wrap{transform: translateY(-0px);}.tatsu-ryQjKulK_ > .tatsu-bottom-divider{z-index: 9999;}.tatsu-ryQjKulK_ > .tatsu-top-divider{z-index: 9999;}.tatsu-ryQjKulK_ .tatsu-section-overlay{mix-blend-mode: normal;}<\/style><\/div><div  class=\"tatsu-rkZ-wc_xKO tatsu-section  tatsu-bg-overlay   tatsu-clearfix\" data-title=\"\"  data-headerscheme=\"background--dark\"><div class='tatsu-section-pad clearfix' data-padding='{\"d\":\"9px 0px 26px 0px\"}' data-padding-top='9px'><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-HJlbw5ugKd\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image-none tatsu-column-effect-none  tatsu-S1-wcdgYd\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-rJFD5ulFu   \" ><style>.tatsu-rJFD5ulFu .tatsu-inline-text-inner{width: 100%;text-align: left;}.tatsu-rJFD5ulFu.tatsu-inline-text .tatsu-inline-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 400;text-transform : none;}@media only screen and (max-width: 767px) {.tatsu-rJFD5ulFu .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<p>\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Spectrometer is a critical component of <a href=\"thickness-measurement-products\/\" target=\"_self\" rel=\"noopener\"><span class=\"tatsu-inline-link-style2\">MProbe measurement system<\/span><\/a>. What is the connection between <a href=\"ariel-spectrometer\/\" target=\"_self\" rel=\"noopener\"><span class=\"tatsu-inline-link-style2\">spectrometer specification <\/span><\/a>\u00a0 \u00a0 and thickness measurement ability? What\u00a0 spectrometer parameters are important and\u00a0 affect the measurement perfomance? How Dynamic Range(DNR) or Signal-To-Noise Ratio(SNR) are connected to\u00a0 thickness and n&#038;k measurement. How wavelength resolution or wavelength range are affecting measurable thickness range?\u00a0<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-S1-wcdgYd.tatsu-column{width: 100%;}.tatsu-S1-wcdgYd.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-S1-wcdgYd > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-S1-wcdgYd > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-S1-wcdgYd > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-S1-wcdgYd > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-S1-wcdgYd.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-S1-wcdgYd.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-S1-wcdgYd.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><div class=\"tatsu-section-background-wrap\"><div class = \"tatsu-section-background tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-section-overlay\"><\/div><style>.tatsu-rkZ-wc_xKO .tatsu-section-pad{padding: 9px 0px 26px 0px;}.tatsu-rkZ-wc_xKO .tatsu-section-offset-wrap{transform: translateY(-0px);}.tatsu-rkZ-wc_xKO > .tatsu-bottom-divider{z-index: 9999;}.tatsu-rkZ-wc_xKO > .tatsu-top-divider{z-index: 9999;}.tatsu-rkZ-wc_xKO .tatsu-section-overlay{mix-blend-mode: normal;}<\/style><\/div><div  class=\"tatsu-r1mQjY_et_ tatsu-section    tatsu-clearfix\" data-title=\"\"  data-headerscheme=\"background--dark\"><div class='tatsu-section-pad clearfix' data-padding='{\"d\":\"17px 0px 5px 0px\"}' data-padding-top='17px'><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-has-one-half tatsu-row-has-two-cols tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-HkN7stOgKd\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-column-no-bg tatsu-one-half tatsu-column-align-middle tatsu-column-image-none tatsu-column-effect-none  tatsu-S1Bmst_lFd\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-single-image tatsu-module align-center be-shadow-light tatsu-image-lazyload tatsu-external-image tatsu-SyLXjYulF_  \" ><div class=\"tatsu-single-image-inner \" style=\"\" ><div class = \"tatsu-single-image-padding-wrap\" style = \"\" ><\/div><a class = \"mfp-image\" href = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/05\/Index_matchedReflectance.gif?fit=600%2C363&#038;ssl=1\" ><img class = \"tatsu-gradient-border\" data-src = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/05\/Index_matchedReflectance.gif?fit=600%2C363&ssl=1\" alt =\" \"  src =\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=\"  \/><\/a><\/div><style>.tatsu-SyLXjYulF_{margin: 0px 0px 0px 0px;}.tatsu-SyLXjYulF_ .tatsu-single-image-inner{border-style: solid;max-width: 100%;}.tatsu-SyLXjYulF_.tatsu-single-image{transform: translate3d(0px,0px, 0);}<\/style><\/div><div class=\"tatsu-row-wrap  tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols tatsu-inner-row-wrap  tatsu-clearfix tatsu-Skeczl5xtu\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image- tatsu-column-effect-  tatsu-S19zl5lYO\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-B1CMe9eFO   \" ><style>.tatsu-B1CMe9eFO .tatsu-inline-text-inner{width: 100%;text-align: left;}@media only screen and (max-width: 767px) {.tatsu-B1CMe9eFO .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<p><strong>Fig. 1<\/strong> Low optical contast measurement &#8211; coating on substrate with R.I. difference &lt; 0.1&nbsp; Reflectance fringes p-p amplitude ~ 0.1%. Model is fitted to the data and thickness\/n&amp;k are determined accurately.<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-S19zl5lYO.tatsu-column{width: 100%;}.tatsu-S19zl5lYO.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-S19zl5lYO > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-S19zl5lYO > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-S19zl5lYO > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-S19zl5lYO > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-S19zl5lYO.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-S19zl5lYO.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-S19zl5lYO.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><\/div><style>.tatsu-row > .tatsu-S1Bmst_lFd.tatsu-column{width: 42.4%;}.tatsu-S1Bmst_lFd.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: none;}.tatsu-S1Bmst_lFd > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-S1Bmst_lFd > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-S1Bmst_lFd > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-S1Bmst_lFd > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-S1Bmst_lFd.tatsu-column{width: 100%;}}<\/style><\/div><div  class=\"tatsu-column  tatsu-column-no-bg tatsu-one-half tatsu-column-align-middle tatsu-column-image-none tatsu-column-effect-none  tatsu-HyPQjFOgKO\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-rkOmjY_xYu   \" ><style>.tatsu-rkOmjY_xYu .tatsu-inline-text-inner{width: 100%;text-align: left;}.tatsu-rkOmjY_xYu.tatsu-inline-text .tatsu-inline-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 400;text-transform : none;}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<h4>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; DYNAMIC RANGE<\/h4>\n<p style=\"text-align: justify;\"><span class=\"swatch-black\" style=\"background-color: rgba(232, 232, 232, 0.1); font-family: 'Nunito Sans', sans-serif; font-size: 16px; letter-spacing: 0px;\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Dynamic range is a ratio of the biggest and the smallest signals that can be measured. We are using 16 bit ADC, so maximum signal is 65535 ADC counts. The smallest signal is the RMS signal (noise) of the dark current. It is, primarily, determined by read-out noise of the detector. For <a href=\"https:\/\/www.hamamatsu.com\/us\/en\/product\/type\/S11639-01\/index.html\" target=\"_self\" rel=\"noopener\">CMOS <span class=\"tatsu-inline-link-style2 swatch-black\">S11639<\/span><\/a> detector, used in<span style=\"color: #224ada;\"><span class=\"swatch-indigo \"> <a style=\"color: #224ada;\" href=\"ariel-spectrometer\/\" target=\"_blank\" rel=\"noopener\">Ariel spectrometer<\/a><\/span>,<\/span> the RMS noise is ~ 13 to 14 ADC counts. This gives the dynamic range of ~ 5000. It follows, that we can measure reflectivity from 100% to 0.02%. Of cause, 0.02% will be the detection limit (signal =noise); so we can accurately measure ~ 0.1% reflectivity difference at low reflectivity level. One such measurement is shown on Fig.1 (left). The amplitude of the interference fringes in reflectance&nbsp; spectrum is ~0.1% and they are very clear: the filmstack model is fit to the measured data and thickness\/n&amp;k can be accurately determined.&nbsp;<\/span><\/p>\n<p style=\"text-align: justify;\"><span class=\"\" style=\"background-color: rgba(232, 232, 232, 0.1); font-family: 'Nunito Sans', sans-serif; font-size: 18px; letter-spacing: 0px;\"><span style=\"font-size: 16px;\">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; For comparison, SonyILX and<\/span> <span class=\"swatch-indigo tatsu-inline-link-style2\"><a href=\"https:\/\/toshiba.semicon-storage.com\/us\/semiconductor\/product\/linear-image-sensors\/detail.TCD1304DG.html\" target=\"_self\" rel=\"noopener\"><span class=\"swatch-indigo \">Toshiba<\/span><\/a> 1304<\/span><\/span> detectors that are used in many popular visible spectrometers, have DNR ~ 1000. It would be more difficult to make the measurement&nbsp; on Fig. 1 with one of those detectors. On another hand, high quality CCD detector like S10420 has DNR ~ 40K to 50K and one can, potentially, accurately measure 0.01% reflectivity. In practice, a very accurate calibration of fixed pattern noise would be&nbsp; needed to measure a signal at that low signal level.&nbsp;&nbsp;<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><\/div><style>.tatsu-row > .tatsu-HyPQjFOgKO.tatsu-column{width: 57.6%;}.tatsu-HyPQjFOgKO.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: none;}.tatsu-HyPQjFOgKO > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-HyPQjFOgKO > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-HyPQjFOgKO > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-HyPQjFOgKO > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-HyPQjFOgKO.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><div class=\"tatsu-section-background-wrap\"><div class = \"tatsu-section-background tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><style>.tatsu-r1mQjY_et_.tatsu-section{background-color: rgba(255,255,255,1);}.tatsu-r1mQjY_et_ .tatsu-section-pad{padding: 17px 0px 5px 0px;}.tatsu-r1mQjY_et_ > .tatsu-bottom-divider{z-index: 9999;}.tatsu-r1mQjY_et_ > .tatsu-top-divider{z-index: 9999;}<\/style><\/div><div  class=\"tatsu-ryq7iYOeKO tatsu-section    tatsu-clearfix\" data-title=\"\"  data-headerscheme=\"background--dark\"><div class='tatsu-section-pad clearfix' data-padding='{\"d\":\"7px 0px 9px 0px\"}' data-padding-top='7px'><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-has-one-half tatsu-row-has-two-cols tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-SyjQsYOgFO\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-column-no-bg tatsu-one-half tatsu-column-align-middle tatsu-column-image-none tatsu-column-effect-none  tatsu-ry3QsYdgKd\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-single-image tatsu-module align-center tatsu-image-lazyload tatsu-external-image tatsu-Hk3vx5-Y_  \" ><div class=\"tatsu-single-image-inner \" style=\"\" ><div class = \"tatsu-single-image-padding-wrap\" style = \"\" ><\/div><a class = \"mfp-image\" href = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/05\/DR_averaging.gif?fit=600%2C362&#038;ssl=1\" ><img class = \"tatsu-gradient-border\" data-src = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/05\/DR_averaging.gif?fit=600%2C362&ssl=1\" alt =\" \"  src =\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=\"  \/><\/a><\/div><style>.tatsu-Hk3vx5-Y_ .tatsu-single-image-inner{border-style: solid;max-width: 100%;}.tatsu-Hk3vx5-Y_.tatsu-single-image{transform: translate3d(0px,0px, 0);}<\/style><\/div><div class=\"tatsu-row-wrap  tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols tatsu-inner-row-wrap  tatsu-clearfix tatsu-rJeIkbqbKu\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image- tatsu-column-effect-  tatsu-BkUJb5Zt_\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-BJzlZ9ZtO   \" ><style>.tatsu-BJzlZ9ZtO .tatsu-inline-text-inner{width: 100%;text-align: left;}@media only screen and (max-width: 767px) {.tatsu-BJzlZ9ZtO .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<p><strong>Fig. 2<\/strong> The effect of averaging on Dynamic Range and Signal-To-Noise.\u00a0\u00a0<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-BkUJb5Zt_.tatsu-column{width: 100%;}.tatsu-BkUJb5Zt_.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-BkUJb5Zt_ > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-BkUJb5Zt_ > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-BkUJb5Zt_ > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-BkUJb5Zt_ > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-BkUJb5Zt_.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-BkUJb5Zt_.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-BkUJb5Zt_.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><\/div><style>.tatsu-row > .tatsu-ry3QsYdgKd.tatsu-column{width: 43.1%;}.tatsu-ry3QsYdgKd.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: none;}.tatsu-ry3QsYdgKd > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-ry3QsYdgKd > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-ry3QsYdgKd > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-ry3QsYdgKd > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-ry3QsYdgKd.tatsu-column{width: 100%;}}<\/style><\/div><div  class=\"tatsu-column  tatsu-column-no-bg tatsu-one-half tatsu-column-align-middle tatsu-column-image-none tatsu-column-effect-none  tatsu-Sk07iKOgYu\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-ByElJ8WKd   \" ><style>.tatsu-ByElJ8WKd .tatsu-inline-text-inner{width: 100%;text-align: left;}@media only screen and (max-width: 767px) {.tatsu-ByElJ8WKd .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<h4 style=\"background-color: #ffffff; letter-spacing: normal;\">\u00a0 \u00a0 \u00a0 \u00a0 SIGNAL-TO-NOISE RATIO(SNR)<\/h4>\n<p><span style=\"font-size: 16px;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0The SNR provides a measure of the signal quality &#8211; it compares the\u00a0 power of the signal to the average power of noise. The largest SNR is achieved for the maximum signal. There are many sources of noise but the large signal is shot-noise limited i.e. the main contribution to the noise is coming from the photons shot-noise.<a href=\"https:\/\/en.wikipedia.org\/wiki\/Shot_noise\" target=\"_blank\" rel=\"noopener\"><span class=\"tatsu-inline-link-style2\">Short noise<\/span><\/a> is defined by the\u00a0 fluctuation of the detected photons and\u00a0 it is described by a square root of the number of photons. For CMOS S11639 detector, the full well electrons capacity is 80ke. Assuming ~ 0.6 Quantum efficiency, we have a maximum SNR ~ 350.\u00a0 It is clear that SNR is significantly lower than Dynamic range.\u00a0 For comparison, Sony ILX detector has ~ 250 SNR and Toshiba 1304 detector ~300 SNR. A high quality CCD S10420 has a maximum of ~ 550 SNR.\u00a0 \u00a0How can we improve it?<\/span><\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><\/div><style>.tatsu-row > .tatsu-Sk07iKOgYu.tatsu-column{width: 56.9%;}.tatsu-Sk07iKOgYu.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: none;}.tatsu-Sk07iKOgYu > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-Sk07iKOgYu > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-Sk07iKOgYu > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-Sk07iKOgYu > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-Sk07iKOgYu.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><div class=\"tatsu-section-background-wrap\"><div class = \"tatsu-section-background tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><style>.tatsu-ryq7iYOeKO.tatsu-section{background-color: rgba(255,255,255,1);}.tatsu-ryq7iYOeKO .tatsu-section-pad{padding: 7px 0px 9px 0px;}.tatsu-ryq7iYOeKO > .tatsu-bottom-divider{z-index: 9999;}.tatsu-ryq7iYOeKO > .tatsu-top-divider{z-index: 9999;}<\/style><\/div><div  class=\"tatsu-Skme7jFdlKO tatsu-section  tatsu-bg-overlay   tatsu-clearfix\" data-title=\"\"  data-headerscheme=\"background--dark\"><div class='tatsu-section-pad clearfix' data-padding='{\"d\":\"24px 0px 0px 0px\"}' data-padding-top='24px'><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-has-one-half tatsu-row-has-two-cols tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-SJNgXiY_gK_\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-half tatsu-column-image-none tatsu-column-effect-none  tatsu-rJBlmsYuetd\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-HJIeXoFOxFO   \" ><style>.tatsu-HJIeXoFOxFO .tatsu-inline-text-inner{width: 100%;text-align: left;}.tatsu-HJIeXoFOxFO.tatsu-inline-text .tatsu-inline-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 400;text-transform : none;font-size : 18px;}@media only screen and (max-width: 767px) {.tatsu-HJIeXoFOxFO .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<h4><span style=\"font-size: 22px;\">HOW TO IMPROVE DYNAMIC RANGE AND SNR?<\/span>\u00a0<\/h4>\n<p><span style=\"background-color: #ffffff; font-size: 16px;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Both Dynamic range and SNR can be improved by using signal averaging. Fig. 2 shows effects of 10 averages and additional boxcar averaging with different number of pixels. The default measurement recipe in MProbe system has 10 averages and 5 pixels boxcar average. This gives ~ 35K dynamic range and ~2500 SNR.<\/span><\/p>\n<p><span style=\"background-color: #ffffff; font-size: 16px;\">To increase DNR and SNR we trade-off measurement time and some wavelength resolution. Typical integration time is ~ 1ms (for 30% reflectivity). 10x averages increase integration time to ~ 10 ms. On the other hand, S10420 CCD detector has a minimum integration time of ~ 8ms. (In fact, S10420 has a low-noise\/high DNR because it internally averages 64 rows of pixel &#8211; 8x improvement). This means that if there is enough light, one can achieve the better results with CMOS detector for the same integration\/measurement time vs. CCD detector.<\/span><\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-rJBlmsYuetd.tatsu-column{width: 45.4%;}.tatsu-rJBlmsYuetd.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-rJBlmsYuetd > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-rJBlmsYuetd > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-rJBlmsYuetd > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-rJBlmsYuetd > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-rJBlmsYuetd.tatsu-column{width: 50%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-rJBlmsYuetd.tatsu-column{width: 50%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-rJBlmsYuetd.tatsu-column{width: 100%;}}<\/style><\/div><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-half tatsu-column-image-none tatsu-column-effect-none  tatsu-B1wxQjF_gK_\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-rkOeXsYugYu   \" ><style>.tatsu-rkOeXsYugYu .tatsu-inline-text-inner{width: 100%;text-align: left;}.tatsu-rkOeXsYugYu.tatsu-inline-text{margin: 10px 0px 30px 0px;}.tatsu-rkOeXsYugYu.tatsu-inline-text .tatsu-inline-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 400;text-transform : none;font-size : 18px;}@media only screen and (max-width: 767px) {.tatsu-rkOeXsYugYu .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<h4><span class=\"swatch-black\" style=\"font-size: 22px;\">OFFSET, DARK SIGNAL\u00a0 AND NON-LINEARITY<\/span><\/h4>\n<p><span class=\"swatch-black\" style=\"font-size: 16px;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 CMOS S11639 is naturally linear for small signals (~ 30% of the range) and very non-linear for high signals. Non-linearity correction is critical for reflectance\/ transmittance measurement because they rely on the reference to determine absolute values. In Ariel spectrometer &#8211; non-linearity is automatically corrected in the firmware. Non-linearity is always calibrated without offset. This means that offset and dark signal need to be accurately corrected for all measurements &#8211; otherwise non-linearity calibration will not be valid. In mass produced spectrometers, dark signal is not corrected and there is always offset. Users are expected to develop their own procedure to deal with that e.g. take and subtract dark signal measurement, etc.\u00a0 In Ariel spectrometer dark signal and offset are calibrated and corrected for a range of operating temperature So, the measurements can be taken without any worry about dark signal, <span class=\"tatsu-inline-link-style2 swatch-black\" style=\"color: #1ed4de;\">read more&#8230; <\/span>The effect of the\u00a0 offset is most prominent for low reflectance measurements ( Fig. 3)\u00a0 <\/span><\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-B1wxQjF_gK_.tatsu-column{width: 54.6%;}.tatsu-B1wxQjF_gK_.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-B1wxQjF_gK_ > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-B1wxQjF_gK_ > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-B1wxQjF_gK_ > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-B1wxQjF_gK_ > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-B1wxQjF_gK_.tatsu-column{width: 50%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-B1wxQjF_gK_.tatsu-column{width: 50%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-B1wxQjF_gK_.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><div class=\"tatsu-row-wrap  tatsu-wrap tatsu-row-has-one-half tatsu-row-has-two-cols tatsu-zero-margin tatsu-medium-gutter tatsu-reg-cols  tatsu-clearfix tatsu-HklceoL9q_\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-half tatsu-column-align-middle tatsu-column-image-none tatsu-column-effect-none  tatsu-ByCgsUqcu\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-single-image tatsu-module align-center tatsu-image-lazyload tatsu-external-image tatsu-ryK1n8cq_  \" ><div class=\"tatsu-single-image-inner \" style=\"\" ><div class = \"tatsu-single-image-padding-wrap\" style = \"\" ><\/div><a class = \"mfp-image\" href = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/06\/Ariel_FX_measurement-1.png?fit=600%2C417&#038;ssl=1\" ><img class = \"tatsu-gradient-border\" data-src = \"https:\/\/i2.wp.com\/www.semiconsoft.com\/wp2\/wp-content\/uploads\/2021\/06\/Ariel_FX_measurement-1.png?fit=600%2C417&ssl=1\" alt =\" \"  src =\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=\"  \/><\/a><\/div><style>.tatsu-ryK1n8cq_ .tatsu-single-image-inner{border-style: solid;max-width: 100%;}.tatsu-ryK1n8cq_.tatsu-single-image{transform: translate3d(0px,0px, 0);}<\/style><\/div><div class=\"tatsu-row-wrap  tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols tatsu-inner-row-wrap  tatsu-clearfix tatsu-SygL_pU55_\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image- tatsu-column-effect-  tatsu-SyIdpI99_\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-BJSKTIcq_   \" ><style>.tatsu-BJSKTIcq_ .tatsu-inline-text-inner{width: 100%;text-align: left;}.tatsu-BJSKTIcq_.tatsu-inline-text .tatsu-inline-text-inner *{font-family : Arial, Helvetica, sans-serif;font-weight : 400;}@media only screen and (max-width: 767px) {.tatsu-BJSKTIcq_ .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<p><strong>Fig. 3<\/strong>&nbsp;<span style=\"font-size: 16px;\"> Measurement of 35um polymer film.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Popular mass produced spectrometer is used as is, without offset\/dark signal correction. Reflectance spectrum is limited and distorted , due to non-linearity and offset. Ariel spectrometer has automatic correction of dark signal\/offset and gives correct spectrum measurement without additional steps. <\/span>&nbsp;<\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-SyIdpI99_.tatsu-column{width: 100%;}.tatsu-SyIdpI99_.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-SyIdpI99_ > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-SyIdpI99_ > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-SyIdpI99_ > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-SyIdpI99_ > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-SyIdpI99_.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-SyIdpI99_.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-SyIdpI99_.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-ByCgsUqcu.tatsu-column{width: 44.6%;}.tatsu-ByCgsUqcu.tatsu-column > .tatsu-column-inner > .tatsu-column-pad-wrap > .tatsu-column-pad{padding: 0px 0px 0px 30px;}.tatsu-ByCgsUqcu.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-ByCgsUqcu > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-ByCgsUqcu > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-ByCgsUqcu > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-ByCgsUqcu > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-ByCgsUqcu.tatsu-column{width: 50%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-ByCgsUqcu.tatsu-column{width: 50%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-ByCgsUqcu.tatsu-column{width: 100%;}}<\/style><\/div><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-half tatsu-column-image-none tatsu-column-effect-none  tatsu-S1e0loIqqd\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div class=\"tatsu-row-wrap  tatsu-row-one-col tatsu-row-has-one-cols tatsu-medium-gutter tatsu-reg-cols tatsu-inner-row-wrap  tatsu-clearfix tatsu-rkeeCkPq5_\" ><div  class=\"tatsu-row \" ><div  class=\"tatsu-column  tatsu-bg-overlay tatsu-one-col tatsu-column-image- tatsu-column-effect-  tatsu-ByxC1v5c_\"  data-parallax-speed=\"0\" style=\"\"><div class=\"tatsu-column-inner \" ><div class=\"tatsu-column-pad-wrap\"><div class=\"tatsu-column-pad\" ><div  class=\"tatsu-module tatsu-inline-text clearfix tatsu-SkrlePc9O   \" ><style>.tatsu-SkrlePc9O .tatsu-inline-text-inner{width: 100%;text-align: left;}@media only screen and (max-width: 767px) {.tatsu-SkrlePc9O .tatsu-inline-text-inner{width: 100%;}}<\/style><div class=\"tatsu-inline-text-inner tatsu-align-center\">\n<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <span style=\"font-size: 22px;\">WAVELENGTH RESOLUTION<\/span><\/p>\n<p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Wavelength resolution is selected based on required thickness range. High resolution allows&nbsp; measurement on thicker films but requires a more narrow wavelength range. But the narrow wavelength range limits the minimum thickness that can be measured. To maximize wavelength resolution for a given wavelength range one needs to minimize abberations and optimize the slit width.<\/p>\n<p>For the Vis system wavelength range is ~ 400-1000nm (600 nm range) and for UVVis 200-1000nm (800nm range). For 2048 pixels detector we have a pixel resolution of ~ 0.3 -0.4nm. The RMS spot (abberations) is ~ 10um. This means that using 20um spit we can achieve &lt;1nm resolution. <span class=\"tatsu-inline-link-style3 \" style=\"color: #7f59e8;\">Read more about <span class=\"tatsu-inline-link-style2 \">thickness<\/span> ranges<\/span><\/p>\n<\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-ByxC1v5c_.tatsu-column{width: 100%;}.tatsu-ByxC1v5c_.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-ByxC1v5c_ > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-ByxC1v5c_ > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-ByxC1v5c_ > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-ByxC1v5c_ > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-ByxC1v5c_.tatsu-column{width: 100%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-ByxC1v5c_.tatsu-column{width: 100%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-ByxC1v5c_.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><\/div><div class = \"tatsu-column-bg-image-wrap\"><div class = \"tatsu-column-bg-image tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-column-overlay tatsu-animate-none\" ><\/div><\/div><style>.tatsu-row > .tatsu-S1e0loIqqd.tatsu-column{width: 55.4%;}.tatsu-S1e0loIqqd.tatsu-column > .tatsu-column-inner > .tatsu-column-overlay{mix-blend-mode: normal;}.tatsu-S1e0loIqqd > .tatsu-column-inner > .tatsu-top-divider{z-index: 9999;}.tatsu-S1e0loIqqd > .tatsu-column-inner > .tatsu-bottom-divider{z-index: 9999;}.tatsu-S1e0loIqqd > .tatsu-column-inner > .tatsu-left-divider{z-index: 9999;}.tatsu-S1e0loIqqd > .tatsu-column-inner > .tatsu-right-divider{z-index: 9999;}@media only screen and (max-width:1377px) {.tatsu-row > .tatsu-S1e0loIqqd.tatsu-column{width: 50%;}}@media only screen and (min-width:768px) and (max-width: 1024px) {.tatsu-row > .tatsu-S1e0loIqqd.tatsu-column{width: 50%;}}@media only screen and (max-width: 767px) {.tatsu-row > .tatsu-S1e0loIqqd.tatsu-column{width: 100%;}}<\/style><\/div><\/div><\/div><\/div><div class=\"tatsu-section-background-wrap\"><div class = \"tatsu-section-background tatsu-bg-lazyload\" data-src = \"\"><\/div><\/div><div class=\"tatsu-overlay tatsu-section-overlay\"><\/div><style>.tatsu-Skme7jFdlKO .tatsu-section-pad{padding: 24px 0px 0px 0px;}.tatsu-Skme7jFdlKO .tatsu-section-offset-wrap{transform: translateY(-0px);}.tatsu-Skme7jFdlKO > .tatsu-bottom-divider{z-index: 9999;}.tatsu-Skme7jFdlKO > .tatsu-top-divider{z-index: 9999;}.tatsu-Skme7jFdlKO .tatsu-section-overlay{mix-blend-mode: normal;}<\/style><\/div>\n","protected":false},"excerpt":{"rendered":"<p><a href=\"https:\/\/www.semiconsoft.com\/wp2\/spectrometer-and-thickness-measurement\/\" class=\"exp-read-more exp-read-more-dots\">&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":7511,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-7506","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.4 (Yoast SEO v27.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Spectrometer and Thickness Measurement - Semiconsoft,Inc.<\/title>\n<meta name=\"description\" content=\"Spectrometer is a critical component of MProbe system. 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