Rapid identification method of tiny angle based on blazed grating
A blazed grating and micro-angle technology, which is applied in the field of sensing, can solve the problems of high cost, cumbersome optical path adjustment, and difficulty in the development of variable pitch gratings, and achieve the effect of rapid identification and improved sensitivity
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[0099] The present invention will be further explained below in conjunction with the drawings.
[0100] 1. A small-angle identification method based on the extraction of blazed grating diffraction spectrum features, using a blazed grating to construct an angular displacement recognition system. It includes the following steps:
[0101] Step 1: Use Y-shaped optical fiber to build the self-collimating optical path system required by the present invention
[0102] The self-collimating optical path system is composed of five parts: broadband light source, Y-type fiber, collimator, blazed grating, and spectrometer. The structure of the blazed grating is as attached in the instruction manual. figure 1 As shown, the single grating angular displacement recognition system based on Y-shaped fiber is attached to the manual figure 2 As shown; the Y-type fiber contains two bifurcated ends and a common end, the two bifurcated ends are the light source incident end and the diffracted light exit e...
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