Sapphire protective covering for medical endoscope
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United States of America Patent
Stats
-
Jan 3, 1995
Grant Date -
N/A
app pub date -
Apr 2, 1993
filing date -
Apr 6, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a sapphire protective covering for the distal end of endoscopes, which distal end is outfitted with an optical system and glass fibers serving to illuminate the viewing field. The sapphire protective covering substantially contains an optical tube holding the optical lens mounting, an inner tube receiving the optical tube and an outer tube enclosing the optical tube and inner tube as well as the glass fibers. The sapphire protective covering is constructed in two parts, a first part covering the optical system and a second part covering at least the light exit area of the glass fibers, and both parts are separated from one another optically at their contacting surfaces. The second part is constructed as a planar disk of determined thickness with a recess corresponding to the dimensioning of the first part. The first part can be constructed as a negative lens.
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