Variable magnification observation apparatus

Details Variable magnification observation apparatus Variable magnification observation apparatus

1984-05-10

1985-07-23

Henry, Jon W.

Illumination

Supported by vehicle structure

Condition responsive

350523, 350519, 362 32, G02B 2112, G02B 514

Patent

active

045305781

ABSTRACT:
A variable magnification observation apparatus capable of changing the magnification thereof includes an optical fiber having an exit surface for emitting an illuminating light beam at an angle corresponding to a predetermined numerical aperture, an aperture stop member disposed near the exit surface of the optical fiber, a field stop member disposed at a predetermined distance from the aperture stop member, and a negative lens removably inserted in the optical path between the aperture stop member and the field stop member.

REFERENCES:
patent: 2861498 (1958-11-01), Klein
patent: 3600568 (1971-08-01), Weyrauch
patent: 3637282 (1972-04-01), Hayamizu et al.
patent: 3669524 (1972-06-01), Shio
patent: 3799645 (1974-03-01), Stankewitz
patent: 3833283 (1974-09-01), Stankewitz
patent: 4253726 (1981-03-01), Taira
patent: 4384200 (1983-05-01), Taira
patent: 4397529 (1983-08-01), Taira

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