Optical viewing device of the periscope type with rotating means

Details Optical viewing device of the periscope type with rotating means Optical viewing device of the periscope type with rotating means

1976-03-31

1978-09-26

Henry, Jon W.

350 47, G02B 2308, G02B 2312, G02B 704

Patent

active

041165284

ABSTRACT:
A head-worn viewing device for alleviating night blindness includes an image intensifier tube between periscopic reflectors with an objective lens in front of the upper reflector and an eyepiece lens behind the lower reflector. The objective and upper reflector are mounted for rotation together about a pivot so that, for short viewing distances, a continuous adjustment is provided which will refocuss the objective at the front plane of the intensifier tube and compensate for the parallax of the periscopic reflectors.

REFERENCES:
patent: 1316438 (1919-09-01), French
patent: 1520245 (1924-12-01), Humbrecht
patent: 1610553 (1926-12-01), Jones
patent: 3846007 (1974-11-01), Flogaus et al.

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