Fluid image transmitting optical system for endoscopes

Details Fluid image transmitting optical system for endoscopes Fluid image transmitting optical system for endoscopes

1997-07-09

1999-04-06

Epps, Georgia

Optical: systems and elements

Lens

Fluid

G02B 106

Patent

active

058926259

ABSTRACT:
A low cost image transmission optical system for an inflexible type endoscope comprising two rod-like lenses disposed in a front-to-back symmetrical manner, each rod-like lens consisting of two correcting lenses encapsulating therebetween a fluid; said fluid, for example, may be water or an optical liquid. The said encapsulated fluid image transmission optical system being arranged that the image brightness and its chromaticity, curvature of field and astigmatic residuals are favorably corrected, and that the said arrangement is not susceptible to breakage when a bending load is applied to the shaft of the endoscope.

REFERENCES:
patent: 2171640 (1939-09-01), Berek
patent: 3257902 (1966-06-01), Hopkins
patent: 3364816 (1968-01-01), Jeffree
patent: 3799656 (1974-03-01), Fleischman
patent: 4168882 (1979-09-01), Hopkins

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