Non-contact indirect measuring method for thickness of Fresnel biprism

A Fresnel biprism and measurement method technology, applied in the field of Fresnel biprism, can solve the problem of measurement and research of thickness parameters without Fresnel biprism, and achieve accurate experimental results, high precision, easy realization, and simple experimental equipment. Effect

Inactive Publication Date: 2016-06-08
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, these existing measurement methods only study the wedge angle and refractive index parameters of the Fresnel double prism, and have not done related measurement research on the thickness parameters of the Fresnel double prism

Method used

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  • Non-contact indirect measuring method for thickness of Fresnel biprism
  • Non-contact indirect measuring method for thickness of Fresnel biprism
  • Non-contact indirect measuring method for thickness of Fresnel biprism

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Embodiment Construction

[0038] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0039] The general thought of the present invention is: adopt and measure the wedge angle of Fresnel double prism, measure the refractive index of Fresnel double prism by minimum deflection angle method and law of refraction method; The thickness of the double prism. In the experimental background of measuring the wavelength of sodium yellow light, by constantly changing the position of the double prism, recording the fringe spacing at different positions, simulating the linear relationship between the position and the fringe spacing, and calculating the thi...

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Abstract

The invention provides a non-contact indirect measuring method for thickness of a Fresnel biprism. The non-contact indirect measuring method comprises the steps of measuring refractivity of the Fresnel biprism in a minimum deviation angle method and a refraction law method through measuring the wedge angle of the Fresnel biprism; and measuring the thickness of the Fresnel biprism in a non-contact manner by means of a statistical method. Under an experiment background of measuring the wavelength of natrium yellow light, through continuously changing the position of the biprism, the fringe spacings at different positions are recorded, and a linear relationship between the position and the fringe spacing is simulated, thereby calculating the thickness of the Fresnel biprism. The non-contact indirect measuring method can realize easy measurement for the thicknes of an easy-damage optical lens on condition that a requirement of no damage is satisfied.

Description

technical field [0001] The invention relates to the technical field of Fresnel double prisms, more specifically, to a non-contact indirect measurement method for the thickness of Fresnel double prisms. Background technique [0002] The technical parameters of the Fresnel double prism have important applications in the fields of national defense, aviation, and industrial production. At present, the earliest method for measuring the thickness of Fresnel biprisms is the method designed by Li Baomin in 1991 to measure the thickness of Fresnel biprisms using a double-Michael interference system; The femtosecond pulse measurement system, theoretically deduced the relationship between the Fresnel double prism bottom angle, refractive index and pulse spot. However, these existing measurement methods only study the wedge angle and refractive index parameters of the Fresnel double prism, and do not conduct related measurement research on the thickness parameter of the Fresnel double ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/06
CPCG01B11/06
Inventor 胡世莱戚会清孙宝光李继强杨墩坤孙敬华
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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