Confocal scanning laser ophthalmoscope

A confocal scanning laser ophthalmoscope, comprising an illumination module, an acquisition module, a scanning element and an imaging lens group, wherein,

• the illumination module is used for emit a collimated light beam, wherein a light source of the illumination module comprises a narrow-band light source such as a laser, or a broadband light source such as a SLD;
• the imaging lens group comprises an ocular lens, a first lens group, a reflective or dichroic mirror and a second lens group;
• after passing through the scanning element, the collimated light beam passes sequentially through the second lens group, the reflective or dichroic mirror, the first lens group and the ocular lens before reaching the retina, and then the reflected and scattered light returns to the acquisition module;
• the acquisition module comprises optical fibers, which are used for collecting the returned light from the imaging target;
• and at lens surface centers, the deviation angle between the incident marginal rays and reflected rays on all surfaces of the ocular lens, the first lens group and the second lens group is no less than 0.5 degree.