Olympus Medical Systems Corporation

Takuya Takechi

Takeshi Suga

Hiroaki Kinoshita

Atsushi Goto

Daisuke Akiyama

Tsutomu Urakawa

Akihito Miyata

Makoto Tanabe

Shinji Egami

Masao Akai

Kaito Nakahara

Koichi Akahori

An endoscope optical connector includes: a sleeve which houses an end portion of an optical fiber inside the sleeve; an inward flange provided on an inner circumference of the sleeve; a glass member arranged inside the sleeve so as to face an end surface of the optical fiber; a cap member which is attached to the sleeve and which fixes the glass member between the cap member and the inward flange; a first O-ring interposed between the cap member and the glass member; a second O-ring interposed between the glass member and the inward flange and having a glass transition point lower than a glass transition point of the first O-ring; and an inert gas filling the inside of the sleeve.

Endoscope optical connector and endoscope

An endoscope includes an insertion portion including an image pickup section, an illumination section, and a light guide inserted inside the insertion portion, the light guide including a plurality of fibers made of a glass not containing lead, the plurality of fibers guiding illuminating light from a light source apparatus to the illumination section, the light guide having a numerical aperture of 0.46 to 0.90. A core glass of a fiber have a refractive index nd of 1.56 to 1.74, and a composition of (A) 20 to 55 wt % SiO, (B1) 0 to 4.0 wt % BO, (B2) neither POnor GeOcontained, (C) 25 to 72 wt % (BaO+SrO+LaO+LuO+TaO+GdO+WO), (D) 0 to 30 wt % ZnO, (E) no AlOcontained, (F) no ZrOcontained, (G) neither PbO nor AsOcontained, (H) 0 to 15 wt % (NaO+KO), (I) 0 to 0.050 wt % SbOand (J) 0.26 to 1.63 wt % (NaSO+KSO).

Endoscope

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Hachioji, Japan

Takuya Takechi