Patent ID: 11896309
Assignee: SUZHOU INSTITUTE OF BIOMEDICAL ENGINEERING AND TECHNOLOGY, CHINESE ACADEMY OF SCIENCES
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A

Claim 4:
5. The common beam scanning retinal imaging system according to claim 4, characterized in that, the small field-of-view high-resolution imaging is performed by the following process:
the light beam emitted by the light source module goes through the wavefront corrector of the adaptive optics module and the beam scanning module, and is reflected by the first dichroic beam splitter to enter the small field-of-view relay module, then exits from the small field-of-view relay module and is reflected by the second dichroic beam splitter, is transmitted through the third dichroic beam splitter and the fourth dichroic beam splitter, passes through the hollow part of the ring-shaped LED array to reach the human eye, and is focused on a point on the fundus retina by the optical system of the human eye; the incident light beam is scattered by the fundus retina to form a scattered imaging light beam carrying aberration information of the human eye and light intensity information at the point on the fundus retina; the scattered imaging light beam returns along the original optical path and exits from the beam scanning module, and is then reflected by the wavefront corrector to the first beam splitter; the first beam splitter reflects the light beam to the second beam splitter, one part of the light reflected by the first beam splitter is reflected by the second beam splitter to enter the wavefront sensor; the wavefront sensor transmits the received aberration information of the human eye to the control module; the control module restores the wavefront aberration and calculates an aberration correction voltage, and then transmits the aberration correction voltage to the wavefront corrector to perform real-time correction of human eye aberration; at the same time, the other part of the light reflected by the first beam splitter is transmitted through the second beam splitter, and is then transmitted totally through the fifth dichroic beam splitter, then passes through the first collection lens and the first pinhole, and finally reaches the first detector; the first detector converts the received light signal of the fundus retina into an electrical signal and outputs the electrical signal to the control module; the control module performs signal synchronization processing, samples the electrical signal to reconstruct an imaging image of the retina with a small field of view and high resolution, which is then displayed and stored by the output module; and
the large field-of-view low-resolution imaging is performed by the following process:
the light beam emitted by the light source module goes through the wavefront corrector of the adaptive optics module and the beam scanning module, is transmitted through the first dichroic beam splitter and the second dichroic beam splitter, and is reflected by the third dichroic beam splitter to enter the large field-of-view relay module, then exits from the large field-of-view relay module and is reflected by the fourth dichroic beam splitter, passes through the hollow part of the ring-shaped LED array to reach the human eye, and is focused on a point on the fundus retina by the optical system of the human eye; the incident light beam is scattered by the fundus retina to form a scattered imaging light beam carrying light intensity information at the point on the fundus retina; the scattered imaging light beam returns along the original optical path and exits from the beam scanning module, and is then reflected by the wavefront corrector to the first beam splitter; the first beam splitter reflects the light beam to the second beam splitter, the light reflected by the first beam splitter is transmitted through the second beam splitter, and is then reflected totally by the fifth dichroic beam splitter, then passes through the second collection lens and the second pinhole, and finally reaches the second detector; the second detector converts the received light signal of the fundus retina into an electrical signal and output the electrical signal to the control module; the control module performs signal synchronization processing, samples the electrical signal to reconstruct an imaging image of the retina with a large field of view and low resolution, which is then displayed and stored by the output module.