Hard-type endoscope apparatus

Details Hard-type endoscope apparatus Hard-type endoscope apparatus

1995-02-15

1997-02-11

Apley, Richard J.

Surgery

Endoscope

Having imaging and illumination means

600138, 600171, 600181, 359435, A61B 106

Patent

active

056015259

ABSTRACT:
A hard-type endoscope apparatus equipped with an inserting portion, a plurality of lenses inserted in the insertion portion, and a lens-barrel holding the lenses, includes a spacer pipe provided in the lens-barrel along the optical path of the lenses. The lens barrel is made of synthetic resin materials containing an additive. The additive forms matting irregularities on an inner surface of the tubular member.

REFERENCES:
patent: 3257902 (1966-06-01), Hopkins
patent: 4306546 (1981-12-01), Heine et al.
patent: 5078773 (1992-01-01), Thomas
patent: 5359453 (1994-10-01), Ning
patent: 5423312 (1995-06-01), Siegmund et al.
patent: 5488990 (1995-09-01), De Faria-Correa

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