Endoscope apparatus
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United States of America Patent
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May 27, 2003
Grant Date -
Jun 7, 2001
app pub date -
Dec 4, 2000
filing date -
Dec 3, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An endoscope apparatus for reducing a halation for a large observation area without an illumination nonuniformity includes an insertion part which has an end having a wide-angle object optical system with two or more types of illumination optical systems having different illumination strength or light distribution. An illumination optical system having a greater illumination strength or wider light distribution is arranged on both sides of the end in a direction of a long side of a screen of the wide-angle object optical system. An illumination optical system having a lesser illumination strength or narrower light distribution is arranged on both sides of the end in a direction of a short side of the screen of the wide-angle object optical system.
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