Detection method of optical element refractivity and detection device thereof

Abstract

The invention provides a non-destructive and highly-precise refractivity measuring method for miniature optical elements and a detection device thereof. The detection method comprises the following steps: (1) lights emitted by a light source go through a collimating lens and a light gap, then the lights is parallelly incident on a first sample cell and a second sample cell; then the lights go through a convergent lens and are converged on a cylindrical mirror, and two interference fringes vertically arranged can be watched from an observation pipe behind the cylindrical mirror; (2) an optical element to be measured is put into the first sample cell, and the upper interference fringe moves relative to the lower interference fringe; (3) calculating the interference grade through watching the displacement situation of the interference fringes, and finally obtaining the refractivity value of the optical element through formula calculation. The invention utilizes a Rayleigh interferometer, establishes a novel measuring method, and utilizes the two beam interference method's characteristics of high precision, simple structure, and user-friendliness so as to achieve the non-destructive and highly-precise measurement on refractivity of miniature or deformed optical elements.

Description

technical field

[0001] The invention relates to a detection method for the refractive index of an optical element, in particular to a non-destructive detection method and a detection device for a small optical element. Background technique

[0002] With the development of the optical industry, the requirements for various small optical components are not only large in quantity, but also high in quality. The refractive index parameters of optical components are the basis of optical design. Only by accurately mastering the reliable data of the refractive index of optical materials can high-quality design work be completed according to requirements. For the research and manufacture of optical element materials, determining the refractive index performance index of the optical element material under study is an important basic content, the technical basis for material evaluation, and the reference basis for production finalization. The accurate determination of the rate is the ...

Examples

Embodiment Construction

[0022] The present invention utilizes a Rayleigh interferometer (Rayleigh interferometer), and adopts its characteristics of high double-beam interference precision, simple structure, and convenient use to realize non-destructive high-precision testing of the refractive index of small or special-shaped optical elements.

[0023] The detection device of the present invention is followed by the light path in order: light source 1, collimating lens 2, optical slit 3, sample pool, compensator, converging lens 7, cylindrical mirror 8 and observation tube 9, and above-mentioned sample pool comprises the first sample pool 4 and the second sample cell 5, the compensator includes a first compensator 10 and a second compensator 11, and a small hole 6 is opened on the first sample cell 4.

[0024] figure 1 Shown is the optical path diagram of the present invention for detecting the refractive index of small optical elements such as squares and circles with regular shapes and sizes.

[0...

technical field

[0001] The invention relates to a detection method for the refractive index of an optical element, in particular to a non-destructive detection method and a detection device for a small optical element. Background technique

[0002] With the development of the optical industry, the requirements for various small optical components are not only large in quantity, but also high in quality. The refractive index parameters of optical components are the basis of optical design. Only by accurately mastering the reliable data of the refractive index of optical materials can high-quality design work be completed according to requirements. For the research and manufacture of optical element materials, determining the refractive index performance index of the optical element material under study is an important basic content, the technical basis for material evaluation, and the reference basis for production finalization. The accurate determination of the rate is the ...

Examples

Embodiment Construction

[0022] The present invention utilizes a Rayleigh interferometer (Rayleigh interferometer), and adopts its characteristics of high double-beam interference precision, simple structure, and convenient use to realize non-destructive high-precision testing of the refractive index of small or special-shaped optical elements.

[0023] The detection device of the present invention is followed by the light path in order: light source 1, collimating lens 2, optical slit 3, sample pool, compensator, converging lens 7, cylindrical mirror 8 and observation tube 9, and above-mentioned sample pool comprises the first sample pool 4 and the second sample cell 5, the compensator includes a first compensator 10 and a second compensator 11, and a small hole 6 is opened on the first sample cell 4.

[0024] figure 1 Shown is the optical path diagram of the present invention for detecting the refractive index of small optical elements such as squares and circles with regular shapes and sizes.

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