Optical test system and optical test method

Abstract

The invention provides an optical test system and an optical test method, the optical test system comprises a light source module, a reflection module, a detection module and a calculation module, thelight source module emits a light beam, a test object is arranged between the light source module and the reflection module, a light beam emitted by the light source module is used for imaging the test object and is reflected by the reflection module, the detection module is used for acquiring an image of the test object, the position of the detection module is adjusted, and the quality of the image acquired by the detection module is changed along with the position. The calculation module records the position of the detection module when the imaging acquired by the detection module changes,and the calculation module calculates the back focus parameter of the test object according to the position change of the detection module.

Description

technical field [0001] The invention relates to the field of optical testing, and more specifically relates to an optical testing system and an optical testing method. Background technique [0002] In the finished optical product, after the lens is assembled, some parameters cannot be adjusted. If these parameters of the lens are not accurately determined, the phenomenon that the lens cannot be well matched with other components of the finished product will occur, which will affect the normal use of the finished product. For example, the back focus position of some lenses cannot be adjusted after the lens assembly is completed. If the back focus cannot be accurately measured before the lens assembly, it may cause the imaging surface of the lens optical system and the focal plane of the photodetector to be unable to match, making the optical The system cannot accurately image on the focal plane of the photodetector, which seriously affects the imaging quality. [0003] In a...

AI Technical Summary

Problems solved by technology

Therefore, the back focus of the lens at different temperatures also needs to be tested, so as to consider how to use temperature compensation during the lens assembly process to prevent the focal plane from shifting due to temperature changes, resulting in poor imaging quality.

In the general test method, after the lens is adjusted to the temperature by the equipment, the lens is taken out for testing. During the test, the lens cannot be kept warm, and the back focus value obtained from the test cannot correspond to the corresponding test temperature.

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