Optical system for non-flexible endoscopes

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

1996-09-19

1998-12-22

Willis, Davis L.

Optical: systems and elements

Compound lens system

359363, 359434, 359716, 359717, 359792, 359644, 359690, 359367, G02B 2136, G02B 2702, G02B 302, G02B 912

Patent

active

058525114

ABSTRACT:
In a non-flexible endoscope consisting of an insertion section and an eyepiece section which are separable from each other, an optical system configured so as to correct chromatic aberration produced by an observation optical system disposed in the insertion section with an eyepiece optical system disposed in the eyepiece section. The optical system according to the present invention selects a simple composition for the observation optical system so that it is manufacturable at a low cost and disposable, and is configured so as to have favorable optical performance as a whole by correcting chromatic aberration produced by the observation optical system with the eyepiece optical system.

REFERENCES:
patent: 4036218 (1977-07-01), Yamashita et al.
patent: 4575195 (1986-03-01), Hoogland
patent: 4641927 (1987-02-01), Prescott et al.
patent: 5177605 (1993-01-01), Takahashi et al.
patent: 5206759 (1993-04-01), Ono et al.
patent: 5396366 (1995-03-01), Brown et al.
patent: 5412504 (1995-05-01), Leiner et al.
WO 93/15647, Aug. 19, 1993, PCT/US93/00515, Filed Jan. 28, 1993.

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