Ophthalmic photographing apparatus

Details Ophthalmic photographing apparatus Ophthalmic photographing apparatus

1992-06-22

1994-08-23

Ben, Loha

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, 351214, 351221, A61B 314

Patent

active

053411803

ABSTRACT:
Ophthalmic photographing an image of an eye to be examined comprises: frame memory for memorizing the image data of the photographed eye, light detecting device for detecting an amount of the light emitted from a light source for photographing, correcting device for correcting a density of the image data memorized in the frame memory by comparing the amount of the light detected by the light detecting device with predetermined amount of reference light. Therefore the ophthalmic photographing apparatus can display the image having a constant density, even though the amount of the light emitted from the light source for photographing changes.

REFERENCES:
patent: 4196980 (1990-04-01), Heine
patent: 4423936 (1984-01-01), Johnson
patent: 4786162 (1988-11-01), Fujiwara et al.
patent: 4901101 (1990-02-01), Ishida et al.
patent: 5071245 (1991-12-01), Fukuma et al.
patent: 5291231 (1994-03-01), Hideshima et al.

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