초록 ▼

Disclosed is an ophthalmic examination apparatus in which a laser beam is deflected at an eye fundus under examination to scan the eye fundus two-dimensionally, and light reflected back from the eye fundus is detected for photoelectric conversion to obtain information about the eye fundus. The appar

Disclosed is an ophthalmic examination apparatus in which a laser beam is deflected at an eye fundus under examination to scan the eye fundus two-dimensionally, and light reflected back from the eye fundus is detected for photoelectric conversion to obtain information about the eye fundus. The apparatus includes a first optical deflector for deflecting the laser beam to scan the eye fundus in one direction and a second optical deflector for deflecting the laser beam to scan the eye fundus in a direction perpendicular to the scanning direction of the first optical deflector. A detection slit is provided which extends perpendicularly to the scanning direction of the second optical deflector and which is disposed at a position optically conjugate with the eye fundus. The reflected light is deflected in a direction parallel to the detection slit, but stationary in a direction that is perpendicular to the slit. The slit serves to remove unrequired scattered light from the optical system for examining the eye.

대표청구항 ▼

An ophthalmic examination apparatus in which a laser beam is deflected at an eye fundus under examination to scan said eye fundus two-dimensionally, and light reflected back from said eye fundus is detected for photoelectric conversion to obtain information about the eye fundus, said apparatus compr

An ophthalmic examination apparatus in which a laser beam is deflected at an eye fundus under examination to scan said eye fundus two-dimensionally, and light reflected back from said eye fundus is detected for photoelectric conversion to obtain information about the eye fundus, said apparatus comprising: a laser light source for producing said laser beam of a single or plurality of wavelength; a first non-mechanical optical deflector for deflecting said laser beam to scan said eye fundus in one direction at a predetermined frequency; a second mechanical optical deflector for deflecting said laser beam to scan said eye fundus in a direction perpendicular to the scanning direction of said first optical deflector at a frequency that is lower than the frequency of said first optical deflector; a detection slit having an aperture which extends perpendicularly to the scanning direction of said second optical deflector and which is disposed at a position optically conjugate or substantially conjugate with said eye fundus under examination; optical means for deflecting light reflected from said eye fundus relative to the scanning direction of said second optical deflector in such a manner that the reflected light is deflected in a direction parallel to the detection slit, but stationary in a direction that is perpendicular to the slit; and light receiving elements for detecting light passing through said detection slit which serves to remove unrequired scattered light from the optical system for examining the eye to obtain said eye fundus information.