1974-07-12
1976-03-16
Smith, Alfred E.
350291, 350301, G02B 2714, G02B 508
Patent
active
039443361
ABSTRACT:
A uni-directional viewing system with an obliquely disposed mirror defining a beam splitter for partial reflection and partial transmission of a light beam that is generated by a source and having an absorber disposed at one side of the mirror for absorbing the beam that is transmitted through the mirror. The reflected beam is directed towards a viewing port, which is disposed at the other side of the mirror. An eye port, which is disposed on the absorber side of the mirror, is provided for observing a subject at the viewing port. The observed subject views only the image of the source and the observer views the observed subject.
REFERENCES:
patent: 1636834 (1927-07-01), Peters et al.
patent: 2286570 (1942-06-01), Pollack
patent: 2663218 (1953-12-01), Ranseen
patent: 2711667 (1955-06-01), Simjian
patent: 2796801 (1957-06-01), Simjian
patent: 2926559 (1960-03-01), Oppenheimer
Electron Optics Corporation
Henry Jon W.
Smith Alfred E.
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