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Light pressure measurement device and method

A technology of measuring device and tensioning device, which is applied in the measurement of the change force of the optical properties of the material when it is stressed, can solve the problem of small magnitude of light pressure, and achieve convenient operation, fine measurement of deformation, and structural simple effect

Inactive Publication Date: 2018-01-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] Because the magnitude of the light pressure is rather small, it cannot be measured using ordinary force-measuring devices

Method used

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  • Light pressure measurement device and method

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Embodiment Construction

[0029] The specific embodiments of the present invention will be described below in conjunction with the drawings:

[0030] The theoretical solution for the deformation of a circular membrane with a fixed periphery and a concentrated force acting on the center is as follows:

[0031]

[0032] Where w 0 Is the displacement of the center point of the film; h is the thickness of the film; υ is the Poisson's ratio of the film; R is the radius of the film; E is the elastic modulus of the film; P is the concentrated force acting on the center point of the film.

[0033] Such as figure 1 As shown, the principle of Michelson interferometry and the main devices used are as follows:

[0034] The light emitted from the light source L passes through the beam splitter G1 and is divided into two beams. One beam passes through the compensation plate G2 and then illuminates the fixed reflector M1. After being reflected by the fixed reflector M1, it passes through the compensation plate G2 again and is...

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Abstract

The invention discloses a light pressure measurement device and method, and belongs to the technical field of light pressure measurement. The light pressure measurement device comprises a base, a horizontal sliding block, an inclination angle adjustment device, a support, a vertical sliding block, a tensioning device, a fixture and a circular thin film, and is characterized in that the horizontalsliding block is arranged in a horizontal sliding slot on the base, the vertical sliding block is arranged in a vertical sliding slot on the support, the center of the vertical sliding block is provided with a square hole, the tensioning device is connected inside the square hole, the tensioning device is used for clamping the circular thin film through the fixture, and the inclination angle adjustment device is used for adjusting an inclination angle of the circular thin film in the forward-and-backward direction. The light pressure measurement device forms a light pressure measurement systemtogether with a light source, a light splitting plate, a compensation plate, an observation screen and a fixed reflector. The light pressure measurement method is implemented through the light pressure measurement system. According to the light pressure measurement device and method provided by the invention, the measurement device is simpler in structure, the operation is more convenient, and the measurement for the deformation is finer, thereby being suitable for measuring very small light pressure.

Description

Technical field [0001] The invention specifically relates to a light pressure measuring device and method, belonging to the technical field of light pressure measurement. Specifically, it relates to a device and method for measuring the magnitude of light pressure by using the theoretical solution of deformation of a circular film fixed on the periphery and Michelson interferometry. Background technique [0002] Light has wave-particle duality, which mainly shows volatility in its propagation process, and mainly shows particle property when it interacts with objects. When light shines on an object, the light particles exchange kinetic energy with the object. According to the momentum theorem, the object can obtain kinetic energy at this time. Macroscopically, this phenomenon is manifested as light has pressure, and objects of a certain area receive a certain force due to light pressure. [0003] Because the magnitude of light pressure is quite small, it cannot be measured with or...

Claims

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Application Information

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IPC IPC(8): G01L1/24
Inventor 史爱明蒋力王宗阳
Owner NORTHWESTERN POLYTECHNICAL UNIV