External optical device for providing multiple optical ports for

Details External optical device for providing multiple optical ports for External optical device for providing multiple optical ports for

1993-04-19

1994-11-15

LaRoche, Eugene R.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359363, 359638, 359643, G02B 2714

Patent

active

053653750

ABSTRACT:
A device for providing multiple optical ports on an optical gunsight with a minimum impact on eye relief and which preserves full viewing angle is provided. A housing which includes first and second hinged housing portions is clamped about the circumference of the gunsight. A lens assembly is supported by one of the housing portions having an optical axis in line with the gunsight optical axis. A front lens and aspheric optical distortion lens relay a gunsight image to the beamsplitter. The beamsplitter directs first and second images from a gunsight image along axes which are in line an perpendicular to the gunsight axes. The assembly also includes identical third and fourth lenses which produce images of the gunsight exit pupil along each of these axes.

REFERENCES:
patent: 1470770 (1923-10-01), Siedentopf
patent: 3008396 (1961-11-01), Mito
patent: 4732438 (1988-03-01), Orbach et al.
patent: 4993819 (1991-02-01), Moorhouse

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