Objective optical system for endoscopes

Details Objective optical system for endoscopes Objective optical system for endoscopes

1976-08-23

1978-07-18

Corbin, John K.

Surgery

Truss

Pad

350 9625, 350175GN, 128 6, G01B 516, G01B 514

Patent

active

041011961

ABSTRACT:
An objective optical system for endoscopes comprising a cylindrical light-focusing heterogeneous medium, for which refractive index distribution is expressed by the following formula and which is arranged on the object side of an image-transmitting optical fiber bundle.

REFERENCES:
patent: 3626194 (1971-12-01), Hirano et al.
patent: 3801181 (1974-04-01), Kitano et al.
patent: 4017150 (1977-04-01), Imai
Uchida et al. "Optical Characteristics of a Light-Focusing Fiber Guide ..." JEEE Jour of Quan Elec., Vol. QE-6, No. 10, Oct. 1970, pp. 606-612.

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