Optical system for fundus imaging and fundus camera thereof

Abstract

The application discloses an optical system for fundus imaging and a fundus camera thereof. The optical system for fundus imaging comprises an illumination assembly, an imaging assembly, an objective lens assembly and a diaphragm structure. The illumination assembly comprises a light source, and an illumination light path is formed between the light source and an examination position to provide an illumination beam to irradiate a pupil. The imaging assembly comprises an imaging element to form a fundus image, and an imaging light path is formed between the imaging element and the examination position. The objective lens assembly is arranged in the illumination light path and the imaging light path, and an objective lens optical axis is formed between the objective lens assembly and the examination position. The illumination light path and the imaging light path are arranged at an angle and are separately arranged on two sides of the objective lens optical axis. The diaphragm structure comprises a first light-transmitting part arranged in front of the imaging element to allow a fundus-reflected light beam to pass through. In the case of allowing the fundus-reflected light beam to pass through the imaging light path, optical ghost images caused by stray light reflected by the objective lens assembly are eliminated.

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