Two-dimensional optical displacement sensor
A displacement sensor and optical technology, applied in the direction of optical devices, instruments, measuring devices, etc., to achieve the effects of easy real-time online automatic measurement, low production cost, and simple structure principle
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[0014] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0015] A two-dimensional optical displacement sensor includes a light source 1, a first sensing unit, a polarization beam splitting prism 5, a photodetector, a divider and a second sensing unit.
[0016] Both the first sensing unit and the second sensing unit are composed of a transparent right-angle prism, a polarizing beam splitting film and a right-angle prism made of a transparent optically active material.
[0017] The first sensing unit is composed of a transparent right-angle prism 2 , a polarizing beam splitting film 3 and a right-angle prism 4 made of a transparent optically active material. The directions indicated by the left and right arrows in the right-angle prism 4 indicate that when the light is transmitted along this direction, the polarization plane of the light will be rotated. The second sensing unit is composed ...
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