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Patent Searching and Data


Title:
EYE PHOTOGRAPHING DEVICE
Document Type and Number:
Japanese Patent JPH10248812
Kind Code:
A
Abstract:

To enable image picking-up of an eye by lamp illumination using a digital image pick-up means the sensitivity of which is substantially improved.

An eye fundus Er is illuminated by an incandescent lamp light source 1, the reflected light from the eye fundus Er is image formed on a digital image pick-up means 10, and 15-screen/second semi-animation images are outputted to a signal processing control means 11 to display them as eye fundus image Er' on a video monitor 12. In this case, the video monitor 12 adds horizontal and vertical adjacent 2×2=4 picture elements, which are D/A converted as a 1 picture element. By this, noise is averaged to improve S/N for substantially improving the sensitivity of the digital image pick-up means 10.


Inventors:
KOBAYAKAWA YOSHI
Application Number:
JP8205997A
Publication Date:
September 22, 1998
Filing Date:
March 14, 1997
Export Citation:
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Assignee:
CANON KK
International Classes:
A61B3/14; (IPC1-7): A61B3/14
Attorney, Agent or Firm:
日比谷 征彦