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A 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

Active Publication Date: 2021-06-22
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] The purpose of the present invention is to propose a two-dimensional optical displacement sensor to solve the problem of two-dimensional displacement sensing detection

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  • A two-dimensional optical displacement sensor

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Embodiment Construction

[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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Abstract

A two-dimensional optical displacement sensor. The light emitted by the light source passes through the first sensing unit and is divided into two optical paths by the polarization beam splitting film. For measurement, the measurement data is sent to a divider for processing; the other optical path enters the second sensing unit, is divided into two optical paths again, and is measured by the photodetector respectively, and the measurement data is sent to a divider for processing ; judging the two-dimensional movement information of the first sensing unit through the data changes processed by the two division operators. The present invention adopts the dual optical path signal detection technology, which can eliminate the influence factors such as the fluctuation of the luminous power of the light source and the absorption of light intensity; adopts the optical method, so that the sensor is not disturbed by electromagnetic and other environmental factors, and overcomes the shortcomings of ordinary electromagnetic displacement sensors; The structure principle is simple, the manufacturing cost is low, and it is easy to realize real-time online automatic measurement.

Description

technical field [0001] The invention belongs to the technical field of photoelectric detection, photoelectric sensing and optical information processing, and in particular relates to a two-dimensional optical displacement sensor. Background technique [0002] Displacement is one of the common and important physical quantities in engineering inspection. Physical quantities such as stress, temperature, and velocity can be indirectly measured through displacement detection. Displacement detection technology is a detection method that converts displacement into other measurable physical quantities that have a definite relationship with it. With the development of industrial technology, displacement detection has become very important and widely used, such as scientific and technological measurement, automatic devices, machine tool control, etc. Displacement sensors are mainly divided into two types: contact type and non-contact type. Contact type displacement sensors are genera...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 沈骁
Owner NANJING UNIV OF POSTS & TELECOMM
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