Phase shifting coding method
A technology of phase shift coding and coding method, which is applied to measurement devices, instruments, and optical devices, etc., can solve the problems of difficult determination of fringe order, errors at jumps, and periodic dislocations.
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[0018] (1) The principle of the phase shift encoding method: for any periodic signal , the result of phase shift encoding, B=F[ , ,…, ], n Indicates the number of phase shift steps, such as two-step, three-step, four-step phase shift; Indicates the phase shift step size; the function F[ A ( φ ), ,…, ] indicates a phase-shifted signal , ,…, Any operation between them can be addition, subtraction, or, XOR, and can also be a specified operation; during operation, only some of the phase shift signals can be selected according to the needs, and the phase shift coding method and the periodic signal , phase shift step size, phase shift step number and function F are related, by changing the phase shift step size, phase shift step number and the operation represented by function F, the periodic signal can be adjusted according to actual requirements Perform arbitrary coding to realize various functions.
[0019] (2) Based on the phase shift coding method k (x...
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