Shen Song, Cao Xiangjun, Chen Yuansheng. Digital Measurement of the Modulation and the D.C Level Shifting Rate of the Grating Discs[J]. Editorial Office of Optics and Precision Engineering, 1989,(5): 12-17
Shen Song, Cao Xiangjun, Chen Yuansheng. Digital Measurement of the Modulation and the D.C Level Shifting Rate of the Grating Discs[J]. Editorial Office of Optics and Precision Engineering, 1989,(5): 12-17DOI:
A new method for measuring the modulation and the D. C lavel shifting rate of a grating disc is proposed in this paper. The values of the D. C level and the modulation are given by collecting sample data of Moire signals and digital processing
without requirement of additional equipment. Some of the work is carried out by software
rather than hardware and manual work. The whole work can be digitally finished quickly and automatically. Besides
the quality of the signals can be improved by the digital processing of the microcomputer and thus the high Accuracy can be obtained.