ADCMT 823B Series - 3 Technical Notes; Optical Power Calibration and Wavelength Sensitivity Correction

823xxB Series Optical Sensor Operation Manual
3. TECHNICAL NOTES
3-1
3. TECHNICAL NOTES
3.1 Optical Power Calibration and Wavelength Sensitivity Correction
Features of sensor photodiodes include varying sensitivity for individual photodiodes and wavelength-
dependent sensitivity. This instrument ensures accuracy over a wide range of wavelengths by combining the
power calibration at the calibration wavelength and the wavelength sensitivity correction over a wide range
of wavelengths. The calibration wavelength can be traced to national standards, ensuring high accuracy.
When the wavelength sensitivity correction is performed in the specified wavelength range, accuracy in the
specified wavelength range results from adding a wavelength sensitivity correction error to the optical power
calibration accuracy.
Figure 3-1 Wavelength Sensitivity Characteristics and Power Calibration of the Sensor
Wavelength
sensitivity
correction
Sensitivity
Power
calibration
Calibration wavelength Wavelength