Abstract:
In order to evaluate the integrated properties of visible photoelectric imaging system exactly and objectively, the calibration equipment was developed. The equipment was composed of integrating sphere, standard card, off-axis reflective collimator, mechanical adjustment bench, video acquisition module and comprehensive software. It could complete a measurement of resolution,contrast,optical transfer function(MTF),noise power spectrum, noise equivalent light and sensitivity.For a certain visible photoelectric imaging product, the effectiveness of the equipment was proved. The comprehensive parameter measurements are given:the cut-off frequency is 39.4 mm-1, the contrast is 76.5%,the root-mean-square (RMS) noise is 2.14 mV,the noise equivalent light(NEL) is 0.045 5 cd/m2 and the sensitivity is 47 mV(cd/m2)-1. In addition, an illuminometer and a standard video pattern generator were respectively adopted for making calibration, results show that the maximum relative measurement errors of integrating sphere and the signal acquisition system are -2.3% and 1%.