Patent Number: 6,569,088

Title: Endoscope apparatus

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.

Inventors: Koshikawa; Yutaka (Hachioji, JP)

Assignee: Olympus Optical Co., Ltd.

International Classification: A61B 1/002 (20060101); A61B 001/06 ()

Expiration Date: 05/27/2020