摘要:
A fundus photographing apparatus for photographing a fundus of an examinee's eye includes: a fundus photographing optical system for obtaining a fundus image, including: an optical scanner that scans the fundus with measurement light including at least part of light emitted from a light source; and a light detector that receives light including reflected light from the fundus; a length information obtaining unit for obtaining length information on an axial direction of the eye; and a controller that adjusts driving information of the fundus photographing optical system in relation to a photographing range based on the length information obtained by the length information obtaining unit and controls the fundus photographing optical system based on the adjusted driving information to obtain a fundus image corresponding to a photographing range.
摘要:
A method of designing an aspheric ophthalmic lens capable of reducing aberration of an eye, comprises: a step of modeling an optical system including a cornea and an ophthalmic lens by inclining the optical system about a rotation point by a predetermined angle in consideration of a displacement angle between an optical axis and a visual axis of the eye (1); a step of calculating aberration resulting from the modeled optical system; and a step of designing a shape of at least one of a front surface and a back surface of the ophthalmic lens to reduce the aberration resulting from the modeled optical system.
摘要:
A fundus photographing apparatus for photographing a fundus of an examinee's eye includes: a fundus photographing optical system for obtaining a fundus image, including: an optical scanner that scans the fundus with measurement light including at least part of light emitted from a light source; and a light detector that receives light including reflected light from the fundus; a length information obtaining unit for obtaining length information on an axial direction of the eye; and a controller that adjusts driving information of the fundus photographing optical system in relation to a photographing range based on the length information obtained by the length information obtaining unit and controls the fundus photographing optical system based on the adjusted driving information to obtain a fundus image corresponding to a photographing range.
摘要:
An ophthalmic photographing apparatus includes: an interference optical system (200) including a splitter (26) that splits light, emitted from a measurement light source (27), into measurement light and reference light, and synthesizing the measurement light reflected on an eye (E) with the reference light to guide the synthesized light to a detector (83); a driving part (50) that moves an optical member (31) arranged in the optical path to adjust an optical-path difference between the measurement light and the reference light; an image obtaining part (70) that obtains a tomographic image of a fundus or an anterior segment based on a light receiving signal output from the detector (83); and a driving control unit (70) that controls driving of the driving part (50) to locate the optical member (31) in a predetermined position corresponding to either a photographing mode for photographing the tomographic image of the fundus or a photographing mode for photographing the tomographic image of the anterior segment.
摘要:
An ophthalmic photographing apparatus including an interference optical system for dividing light from a first light source into measurement light and reference light, directing measurement light to a fundus and reference light to a reference optical system, and photo-receiving by a first photodetector interference light, a first optical scanner disposed in a measurement light optical path and scanning measurement light in two dimensional directions, a driving unit moving an optical member in an optical path of measurement light or reference light to change an optical path length, a control unit controlling the driving unit to adjust an optical path length difference, controlling the optical scanner to scan measurement light at a given photographing view angle, and obtaining a tomographic image based on a photodetector signal, and a calculation unit converting a photographing range into an actual distance based on optical member positional information and view angle information.