Device and method for measuring optical uniformity of optical glass

A technology of optical uniformity and optical glass, applied in the field of optical glass inspection, can solve the problems of high measurement cost and difficulty, expensive interferometer, complex measurement process, etc., to reduce detection processing cost, simple measurement, simplified detection program effect
CN103543129AActive Publication Date: 2014-01-29CHINA BUILDING MATERIALS ACAD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA BUILDING MATERIALS ACAD
Publication Date
2014-01-29

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Abstract

The invention relates to a device and a method for measuring the optical uniformity of optical glass and belongs to the field of optical glass detection. Refractive indexes of the optical glass are different due to stress. The measurement device comprises a light source component for supplying polarized light, an interference color forming component for allowing the polarized light capable of generating birefringence to form an interference color, a phase compensator for generating different optical distance differences, a CCD (charge coupled device) camera for photographing an interference color image and a computer for acquiring and processing the interference color image. The measurement device can obtain difference values of the refractive indexes of respective pixel points through the interference color image formed by the birefringence of the optical glass, so that the optical uniformity of the optical glass can be realized. The instruments used by the device are common optical devices, simple, readily available and low in cost; during measurement, the surface of the optical glass does not need to be specially treated, so that measurement steps are simplified, and the cost is further reduced.
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Description

technical field

[0001] The invention relates to a measuring device and method for optical uniformity of optical glass, belonging to the field of optical glass detection, in particular to a device and method for measuring optical uniformity of optical glass whose refractive index is different mainly due to stress. Background technique

[0002] The optical uniformity of optical glass refers to the degree of inhomogeneity of the refractive index inside the same piece of glass. When there is an uneven distribution of elements or chemical bonds in the optical glass, the resulting chemical stress or structural stress will cause the refractive index at different positions of the optical glass to be different. Usually, the difference between the maximum refractive index and the minimum refractive index at each position of the optical glass is Δn Indicates the optical uniformity of the optical glass. Optical uniformity is an important parameter that reflects the quality of optical g...

Claims

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