Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1993-09-17
1995-08-15
Ullah, Akm E.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
G02B 600, G02B 2714
Patent
active
054424836
ABSTRACT:
Optical device for coupling to an optical gunsight. A housing supports an optical assembly in line with the axis of the gunsight. The optical assembly includes an optical plate adjacent the gunsight exit pupil which is in contact with a beamsplitter. The beamsplitter includes first and second prisms having diagonal surfaces abutting one another and including a semi-reflective coating. An optical coating is placed on surfaces of the prisms adjacent the diagonal, to provide for a continuous light transmissivity through the beamsplitter optical plate combination. A relay lens is a located along a folded axis provided by the beamsplitter. The relay lens includes a prism for folding the folded axis a second time, so that the image is reinverted and reoriented right to left. A camera is coupled to the relay lens for monitoring the relayed image.
REFERENCES:
patent: 3734627 (1973-05-01), Edwards
patent: 4255013 (1981-03-01), Allen
patent: 4423957 (1984-01-01), Poole
patent: 4732438 (1988-03-01), Orbach et al.
patent: 4863269 (1989-09-01), Ellis
patent: 4993819 (1991-02-01), Moorhouse
DBA Systems, Inc.
Ullah Akm E.
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