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MProbe UVVisF or MProbe UVVisSR?

There are two MProbeUVVis thin film measurement systems: MProbe UVVis and MProbe UVVisF. Both systems cover 200nm -1000nm wavelength range and can measure thickness and optical constants of thin films.  These systems are using different light source and mode of operation. They have  advantages are disadvantages depending on application requirements.

MProbe UVVisSR system uses 30W short-arc (see-thru) Deuterium lamp and 20W Tungsten-Halogen lamp. These lamps are placed in tandem and, together, they cover UVVis range. Both Deuterium and Tungsten- halogen lamp are high stability continuous light source. This means that longer integration time can be used to improve precision in case of a low intensity signal.

MProbe UVVisF system uses 20W Xe flash lamp. The lamp strobes (< 2 µs) are synchronized with the data acquisition. Short light strobes and gated acquisition  works well in high ambient light environment  like deposition  chambers. Short measurement time is also useful for inline measurement and monitoring other kinetic processes. 


MProbe UVVisF thin film measurement system using 20 W Xe   flash lamp


MProbe UVVisF Brochure
MProbe UVVisSR thin film measurement system

MProbe UVVis thin film  measurment system using 30W Deuterium lamp and 20W Tungsten-halogen lamp in see-thru/tandem configuration

mprobe uvvis brochure
MProbeUvV thickness measurement system reflection from Si wafer

MProbe UVVisF thin-film measurement system. Raw reflectance from bare Si wafer. Spectrum intensity is weighted heavily in UV part of the spectrum 

MProbe UVVisSR thin film measurement system. Reflection from Si wafer

MProbe UVVis thin film measurement system. Raw reflectance from bare Si wafer. The  intensity is balanced between UV and Vis parts of the spectrum

 Light intensity comparison

20W Xe flash lamp has an equivalent ~ 0.5W (500mJ in <2µs pulse).  30 W Deuterium lamp has an equivalent of~ 0.6W in 20ms integration time measurement. Both lamps have approximately the same light intensity at short wavelengths. But MProbe UVVis light source has additional 20W tungsten-halogen lamp that add intensity to the Vis part of the spectrum.

MProbe UVVisF advantages:

  • Short fixed measurement time(< 1ms)  and constant/ predictable measurement frequency. Typically, 10Hz – 20Hz.  
  • High intensity at shorter wavelengths
  • Long lifetime (> 20,000 hrs at 10 Hz)
  • Can be used in high ambient light environment due to gated acquisition 
  • Can be used for inline monitoring other kinetic processes due to short measurement time
MProbe UVVis advantages:
  • Balanced UVVis spectrum, controlled by two independent lamps
  • Smooth spectrum allows measurement of thicker films
  • Can measure low reflectivity using longer integration time
  • Well suited for desktop configuration 



  • Main unit (includes spectrometer, light source)
  • Fiberoptics reflectance probe
  • Sample stage SH200A with focusing lens (MProbe 20  configuration)
  • TFCompanion -RA software, USB dongle(license key), USB memory stick with softwar distribution,User Guide and other materials
  •  Calibration set (bare Si wafer and Quartz plate ) and black absorber
  • Test sample 200nm Si oxide 
  • USB  cable 
  • 24VDC power supply adapter (110/220V)


  • Wavelength range: 200nm -1000nm
  • F3 astigmatism-correted spectrometer with 2018 pixels CMOS detector
  • Wavelength resolution: < 2nm
  • Precision: <0.01nm or 0.01% 
  • Accuracy: <1nm or 0.2% (filmstack dependent)
  • Stability:< 0.02nm or 0.2%
  • Spot size: <1mm







–  MOD 

TCP-IP remote control (based on modbus protocol)

Software plugin to allow measurement control from the 3rd party software

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