Structure of needle-type lens

Details Structure of needle-type lens Structure of needle-type lens

1991-06-13

1993-01-12

Lee, John D.

Optical waveguides

Miscellaneous

385117, 385119, G02B 2326

Patent

active

051796201

ABSTRACT:
A needle type lens structure comprises, an inner tube having a relay lens inserted therein, an outer tube mounted around an outer periphery of the inner tube in concentric relation thereto with a predetermined gap, and light transmitting device, for guiding illumination light to the distal end of the needle type lens, provided axially between the inner tube and the outer tube.

REFERENCES:
patent: 4148550 (1979-04-01), MacAnally
patent: 4281929 (1981-08-01), Lord et al.
patent: 4732450 (1988-03-01), Lee
patent: 4921326 (1990-05-01), Wild et al.
patent: 4930851 (1990-06-01), Yamamoto
patent: 4974924 (1990-12-01), Okada et al.
patent: 4988158 (1991-01-01), Yamamoto

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