JP2016028687A5 - - Google Patents

Claims (6)

Irradiation light source, scanning means for scanning illumination laser light emitted from the irradiation light source on the fundus of the eye to be examined, and objective lens system for guiding the laser light scanned by the scanning means to the fundus of the eye to be examined And an irradiation optical system for irradiating the fundus with a laser beam,
A first light-shielding member disposed at a position conjugate with the fundus of the eye to be examined; the objective lens system is shared with the irradiation optical system; and the light from the fundus is emitted from the laser light irradiated by the irradiation optical system. A light receiving optical system that causes the light receiving element to receive light through the first light shielding member;
An optical path branching member for branching the optical path of the irradiation optical system and the light receiving optical system;
A scanning laser ophthalmoscope for obtaining an image of the fundus oculi based on a light reception signal from the light receiving element,
Provided at a position deviating from the fundus conjugate position of the eye to be examined in the optical path between the optical path branching member and the light receiving element, allowing light from the fundus conjugate plane to pass through, and from the lens surface of the objective lens system A second light shielding member that shields at least part of the reflected light;
A scanning laser ophthalmoscope, wherein the light receiving element receives light from the fundus that has passed through the first light shielding member and the second light shielding member.   The second light shielding member passes a light from a fundus conjugate surface and a central light shielding portion arranged on the optical axis for shielding at least a part of the reflected light from the lens surface of the objective lens system. The scanning laser ophthalmoscope according to claim 1, further comprising a ring-shaped opening. 3. The scanning type according to claim 2 , wherein the central light shielding unit is a filter having a spectral characteristic that shields light in a wavelength region of the laser light and transmits fluorescence excited by the laser light on the fundus of the subject's eye. Laser ophthalmoscope. It said second light shielding member, a scanning laser ophthalmoscope according to any of claims 1 to 3, characterized in that disposed on the lens surface at a position conjugate of the objective lens system. The optical path branching member guides the laser light from the light source to the scanning unit at the central part, removes light from the fundus that has passed through the central part of the pupil from the light receiving optical system, and at the peripheral part, the pupil The light from the fundus that has passed through the periphery of the
It said second light shielding member, a scanning laser ophthalmoscope according to any one of claims 1 to 4, characterized in that it comprises a light blocking region in accordance with the magnitude of applied only the central portion relative to the said opening . The second light-shielding member has an apparent size of the light-shielding region with the opening as a reference within twice the apparent size of the central portion with the opening as a reference. Item 6. The scanning laser ophthalmoscope according to Item 5 .