Laser-based objective lens automatic following focusing method and system

The invention discloses an objective lens automatic following focusing method and system based on laser, and the method comprises the following steps: processing collected image information, and obtaining a light spot image; calculating a focusing evaluation value of the light spot image through a f...

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Bibliographic Details
Main Authors JIA LEI, ZHU JIANQIAO, ZHANG WEI
Format Patent
LanguageChinese
English
Published 21.07.2023
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Summary:The invention discloses an objective lens automatic following focusing method and system based on laser, and the method comprises the following steps: processing collected image information, and obtaining a light spot image; calculating a focusing evaluation value of the light spot image through a focusing evaluation function; and controlling the objective lens to move up and down along the vertical direction based on the calculated focusing evaluation value until the focusing is completed. According to the method, the focusing evaluation value of the light spot image is calculated through the focusing evaluation function, the focusing state can be judged, then based on the focusing evaluation value, rapid rough focusing is performed, the focusing range is narrowed, the focusing efficiency can be improved, a certain anti-interference capability is achieved, and falling into a local optimal solution can be avoided; and then the focusing precision is improved through slow fine focusing, so that the focusing pre
Bibliography:Application Number: CN202310388714