Optical system for non-flexible endoscopes

Details Optical system for non-flexible endoscopes Optical system for non-flexible endoscopes

1999-03-25

2000-04-11

Nguyen, Thong

Optical: systems and elements

Compound lens system

With relay

359362, 359663, 600160, G02B 2300, A61B 1002

Patent

active

060494220

ABSTRACT:
An optical system for non-flexible endoscopes comprising an illumination optical system and an observation optical system which are disposed in an insert section, wherein the observation optical system comprises, in order from a tip thereof, an objective optical system and a single cycle type relay optical system, and an outside diameter D1 of a lens component in the objective optical system whichever has a largest outside diameter, an outside diameter D2 of a lens component in the relay optical system whichever has a largest outside diameter and an outside diameter D3 of the insert section are in relationship expressed by the following conditions (1) and (2):

REFERENCES:
patent: 5603687 (1997-02-01), Hori et al.
patent: 5632718 (1997-05-01), Igarashi et al.
patent: 5891015 (1999-04-01), Strahle

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