OPTICAL SYSTEM AND METHOD FOR ADJUSTING DIOPTER

摘要

An optical system and a method for adjusting diopter using the optical system. The optical system comprises: an eyepiece (10), a semi-transparent and semi-reflective lens (20), a display screen (30), a first stepper motor (40) connected to the display screen (30), an image sensor (50), and an image analysis system (60). The image analysis system (60) is connected to the display screen (30), the first stepper motor (40), and the image sensor (50). The eyepiece (10), the semi-transparent and semi-reflective lens (20), and the display screen (30) are configured sequentially along a first optical axis (70). The semi-transparent and semi-reflective lens (20) and the image sensor (50) are configured sequentially along a second optical axis (80). The first stepper motor (40) can control the display screen (30) to move back and forth along the first optical axis (70). Light emitted from the display screen (30) enters the eyes by means of the semi-transparent and semi-reflective lens (20) and the eyepiece (10). Light reflected from the eyes enters the image sensor (50) by means of the eyepiece (10) and the semi-transparent and semi-reflective lens (20). The image sensor (50) converts an optical signal into a fundus image. The image analysis system (60) controls, according to the fundus image, the first stepper motor (40) to adjust the distance between the display screen (30) and the semi-transparent and semi-reflective lens (20). Therefore, the optical system is adopted to accurately adjust the diopter.