Ophthalmic photography apparatus

Details Ophthalmic photography apparatus Ophthalmic photography apparatus

2008-09-30

2008-09-30

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S213000

Reexamination Certificate

active

11071715

ABSTRACT:
An ophthalmic photography apparatus is provided in which focus and alignment can be adjusted over the whole period of infrared light-excited fluorescence photography. During alignment and focus adjustments, the brightness of index light sources used for such adjustments is increased. When the shutter is operated, the brightness of the index light sources is decreased, dimming the indexes. When the automatic gain control of the imaging device functions in the later phase of the photography, the brightness of the indexes is gradually increased. In the first part of the photography period, the indexes are dimmed to prevent the images thereof from showing up on the recording images, and are brightened in the later stages to make the indexes easier to see.

REFERENCES:
patent: 5557350 (1996-09-01), Yano
patent: 5936706 (1999-08-01), Takagi
patent: 6574432 (2003-06-01), Nanjyo
patent: 2003/0071966 (2003-04-01), Matsumoto
patent: 2004/0218145 (2004-11-01), Matsumoto

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