Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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

Active Publication Date: 2014-01-29
CHINA BUILDING MATERIALS ACAD
View PDF3 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing interferometer is expensive and the measurement cost is high; when measuring by interferometry, the surface of the optical glass sample to be tested needs to be polished, coated with refraction liquid, or pasted with a plate to avoid the formation of interference fringes caused by the rough surface of the sample phenomenon, the measurement process is complicated, the measurement cost and measurement difficulty are high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for measuring optical uniformity of optical glass
  • Device and method for measuring optical uniformity of optical glass
  • Device and method for measuring optical uniformity of optical glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 and figure 2 As shown, the embodiment of the present invention proposes a measuring device for the optical uniformity of optical glass. The measured optical glass has a different refractive index due to stress. The measuring device includes a light source component 10, an interference color forming component 30, and a phase compensator (not shown in the figure), CCD camera 2 and computer 4. The light source assembly 10 is composed of a light source and a polarizer and / or other basic optical devices capable of forming polarized light, and is used to polarize the light source to provide polarized light; the interference color forming assembly 30 is composed of an analyzer or other capable of making the polarized light The optical device that produces interference after birefringence is configured to make the birefringent polarized light form an interference color; the phase compensator is used to make the polarized light generate different optical path ...

Embodiment 2

[0040] An embodiment of the present invention provides a method for measuring the optical uniformity of optical glass, the method comprising:

[0041] Step 1: Measure and record the interference color images under each optical path difference after a polarized light undergoes birefringence, including:

[0042] The method adopts the measuring device provided by the above-mentioned embodiment to measure;

[0043] Before the measurement, first check whether the measuring device is normal. The measuring method is: turn on the light source 12, light passes through each optical device in the optical path in turn, shines on the CCD camera 2, and observe whether the interference color image taken by the CCD camera 2 is displayed on the computer 40 , if the image is displayed, it means that the device is normal and can be tested. If it is unrealistic, each device in the device can be fine-tuned until the interference color image is displayed on the computer 40;

[0044] Then, the phas...

Embodiment 3

[0054] With the method that embodiment 2 provides, measure the homogeneity of an optical glass, described optical glass to be tested causes refractive index difference by stress, and this optical glass size is 54mm * 19mm, and thickness is 20mm, image 3 In order to measure the contour map of the refractive index difference of the sample, Δn can be obtained from the measurement data i The maximum value is 4.9×10 -6 , Δn i The minimum value is -5.8×10 -6 , the difference between the two is 1.17×10 -5 Therefore, the optical uniformity of this sample is 1.17×10 -5 . Additionally, from image 3 It can be seen that Δn i The distribution gradient of , so that you can intuitively see the location of poor uniformity.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/45
Inventor 孙元成宋学富张晓强王慧杜秀蓉刘铸熠
Owner CHINA BUILDING MATERIALS ACAD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com