Using the diffuser method to calibrate the imaging spectrometer

not only the calibration instrument is needed to be considered

but also the incident angle of the standard lamp

the distance of the standard lamp to the diffuser

the slit direction

the observation incident angle and the parameter of the imaging spectrometer are needed to be considered. The expression of the collected signal electron number in each spectral channel of the imaging spectrometer detector pixels about the above parameters was deduced according to the principal of the calibration of imaging spectrometer using diffuser method in this paper. And the effect of the incident angle of the standard lamp

the distance of the standard lamp to the diffuser

the slit direction and the observation incident angle on the electron number collected by the detector pixels was discussed. The results indicate that F number of 4 and 3

the entrance pupil in the range of 0.1m~0.2m

the standard lamp illuminating angle is less than 12?

the angle changes 0.5?

the distance of the standard lamp is in the range of 0.5~2m

the distance changes 1mm

make the change of the signal electron number less than 1%. Satisfying the need above can make the accuracy of the calibration using diffuser method higher.