Method and system for progressive additional lens detection based on optical coherence tomography

Abstract

The invention discloses a method and a system for progressive additional lens detection based on optical coherence tomography. The method includes: indirectly obtaining a three-dimensional image of a progressive additional lens by means of optical coherence tomography, working out the curvature radius of each point of a curved surface and thickness information of corresponding positions, and calculating to obtain optical characteristic parameters of the progressive additional lens according to known refractive index parameters in materials; and on the other hand, surface shape precision of the actual progressive additional lens can be evaluated according to the obtained three-dimensional image. A scanning detection system comprises a system light source, an optical fiber coupling and interference unit, a reference arm unit, a sample arm unit, a signal detection unit, a PC (personal computer) and a control circuit. By the method and the system for progressive additional lens detection based on optical coherence tomography, detection of optical characteristic parameters of the progressive additional lens can be realized while measurement of the whole surface of the progressive additional lens can be further realized. In addition, the method and the system for progressive additional lens detection have the advantages of high measurement resolution and precision, high reliability of measurement results, low cost and the like.

Description

technical field [0001] The invention relates to a method and system for detecting multifocal spectacle lenses based on optical coherence tomography, which are used for simultaneous detection of optical characteristic parameters and surface shape accuracy of progressive multifocal spectacle lenses. Background technique [0002] In the past five years, with the continuous improvement and innovation of material technology and processing design level, the new concept of "progressive multi-focal spectacle lens" has gradually been proposed in the eyewear industry and has become a reality. The resulting "progressive multi-focal lens" has shown a rapid development trend of gradually replacing traditional products and then rising to mainstream products. The digital and intelligent progressive multi-focal lens processing technology is called a technological revolution in the eyewear industry. Advanced countries such as Germany and the United States have successively introduced testing...

AI Technical Summary

Problems solved by technology

However, compared with the design and processing of progressive multifocal lenses, the detection of progressive multifocal spectacle lenses by the current instrument can only provide the optical parameter information of progressive multifocal spectacle lenses, but cannot provide the surface shape of progressive multifocal lenses Accuracy information

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