Disposable rigid endoscope

Details Disposable rigid endoscope Disposable rigid endoscope

1989-07-27

1990-10-23

Arnold, Bruce Y.

350255, G02B 702, G02B 2300

Patent

active

049647105

ABSTRACT:
An endoscope is provided with an objective lens system, an ocular lens and an intermediate relay lens system. The relay lens system is a hybrid system using both plastic and glass elements. The plastic elements comprise an even plurality (N) of axially aligned lenses each having a length of the same order as its diameter. Intermediate said plastic lenses are a plurality (N minus 1) of axially aligned glass plano cylinder, the end faces of which are polished.

REFERENCES:
patent: 3807836 (1974-04-01), Baker
patent: 4036218 (1977-07-01), Yamashita et al.
patent: 4784118 (1988-11-01), Fantone et al.

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