1981-12-07
1985-07-16
Sikes, William L.
350 9625, G02B 516
Patent
active
045292671
ABSTRACT:
An illuminating system for endoscopes comprising a light guide formed to be a flat surface or curved surface at the exit end and a concave lens or convex lens arranged in front of the exit end and made to be a totally reflecting surface on the peripheral surface so that all the illuminating light emitted out of the exit end of the light guide can be effectively utilized and the visual field of an observing system can be uniformly illuminated over a very wide range. A convex mirror or concave mirror is placed between the exit end of the light guide and a concave lens used also as a cover glass so as to adapt the illuminating system to a side view or perspective view type endoscope.
REFERENCES:
patent: 2932294 (1960-04-01), Fourestier et al.
patent: 3142235 (1964-07-01), Siegmund
patent: 3166395 (1965-01-01), Hicks
patent: 4279247 (1981-07-01), Kinoshita
patent: 4281929 (1981-08-01), Lord et al.
patent: 4390012 (1983-06-01), Mizumoto
patent: 4403273 (1983-09-01), Nishioka
Nishioka Kimihiko
Yabe Hisao
Olympus Optical Co,. Ltd.
Sikes William L.
Wise Robert E.
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