Fundus camera
AssigneeCanon Kabushiki Kaisha
InventorsKoji Uchida, Shinya Tanaka, Hiroyuki Inoue, Hajime Nakajima
Life of this patent
Estimating the term…
Abstract
A fundus camera wherein when a photography start switch is selected, the optical axis of an eye examining section is aligned with the optical axis of an eye by a detection operation of an alignment optical system. After focusing of a fundus image is performed, the eye examining section is moved to a first recording mode position, and a first photograph of the fundus is taken by a stroboscopic tube. Subsequent to taking the first photograph of the fundus, a base length is changed and an alignment position is moved to a second recording mode position so that a second photograph of the fundus is taken.
Claims11
A fundus camera comprising:
- an illuminating unit configured to illuminate a fundus of an eye to be examined;
- a viewing photographing optical system configured to form an image of the fundus by receiving light reflected from the fundus due to the illumination by the illuminating unit;
- an image pickup unit configured to pick up the fundus image formed by the viewing photographing optical system;
- an index projecting unit configured to project an alignment index onto the eye;
- an alignment detecting unit configured to calculate information regarding alignment with the eye by receiving a light beam reflected from the alignment index projected by the index projecting unit;
- and
- an alignment driving unit configured to align the illuminating unit and the image pickup unit with the eye on the basis of an output of the alignment detecting unit,
- wherein the alignment driving unit has an ordinary recording mode and a three-dimensional recording mode, and
- wherein, in the ordinary recording mode, a still image is recorded by performing alignment with an alignment reference for the eye, and, in the three-dimensional recording mode, a plurality of recordings are made at positions that are displaced by predetermined amounts with respect to the alignment reference in a direction that is horizontal to an optical axis of the viewing projecting optical system.
Dependencies are inferred from the claim text.