1979-01-22
1980-06-03
Henry, Jon W.
350 67, 350 76, G02B 706, G02B 712
Patent
active
042058945
ABSTRACT:
The optical system in the binoculars includes a pair of sets of optical elements respectively on a pair of carriages mounted in an hermetically sealed housing. These carriages are moved by an external control toward and away from each other in order to vary the interpupillary distance between the two sets of optical elements. A transparent window or windows are located in front of the sets of optical elements and are hermetically mounted on the housing. The windows are large enough to be aligned with the sets of optical elements throughout the range of movement thereof.
REFERENCES:
patent: 2454859 (1948-11-01), Case
patent: 3454773 (1969-07-01), Bulthuis et al.
patent: 3787688 (1974-01-01), Stone
Filipovich Danny
Hartmann Rudolf
Bell & Howell Company
Fitz-Gerald Roger M.
Henry Jon W.
Stotland Harold V.
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