Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1988-02-22
1989-12-12
Arnold, Bruce Y.
Optics: measuring and testing
Range or remote distance finding
With photodetection
350550, 356 12, 356 16, G02B 2310, G02B 2734, G01C 314
Patent
active
048863475
ABSTRACT:
A range-finding binocular is disclosed which has substantially the external appearance and size of a conventional binocular. In each barrel, a system is provided for obtaining a projected image of a range-mark of circular symmetry which is focused in the focal plane of each eye lens at an accurately placed position near the visual axis of the monocular. The distance between the projected image and the visual axis is carefully controlled in order to provide, in stereovision, a sense of distance to the range-mark image which can be "placed alongside" a target of interest by changing the offset distance in a controlled manner. In one embodiment, the image is obtained by a backlighted reticle whose image passes between a transparent glass range-mark translation plate and a transparent glass adjustment plate, through a lens, and to a gold surfaced mirror for directing the projected image into the conventional path of the field of view. The range plate is carried by a holder which is hinged at one end and is pivotable through a small angle by slight fore and aft movement of the free end opposite the hinge as by a fine screw driven by a motor through a gear reduction system. Thus, the position of the range plate determines the offset of the projected image from the optical axis in each monocular, and the cumulative angular position of the motor can be interrogated to obtain and display the apparent range of the image.
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Arnold Bruce Y.
Lerner Martin
Phillips James H.
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