Method of simulating generating of large depth field programmable grating
A grating and depth-of-field technology, applied in the field of optical detection, can solve the problems of limited three-dimensional measurement range, fixed projection pattern, inflexible use, etc., to achieve the effect of improving three-dimensional measurement accuracy, expanding depth of field, and improving measurement range
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[0039]The present invention will be described in detail below in conjunction with the accompanying drawings.
[0040] The technical solution is:
[0041] The first step is to design the working parameters of the system. Determine the maximum working distance L according to the working distance of the grating 2 , the minimum working distance L 1 ; the maximum spot ω of ΔL within the depth of field max ; The number M of lines scanned by a single frame raster image, M is determined by the characteristics of the laser beam.
[0042] The second step is to generate the driving signal. There are three types of drive signals involved. 1) MEMS scanning galvanometer fast axis drive signal, which is a current signal of sine (or cosine) waveform, its frequency f x Equal to the resonant frequency f of the fast axis direction of the MEMS scanning galvanometer, its peak-to-peak value I x峰峰 Determined by the parameters of the MEMS galvanometer. 2) The slow axis drive signal of the MEM...
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