Retro-reflective photogrammetric target

Details Retro-reflective photogrammetric target Retro-reflective photogrammetric target

1988-05-02

1991-12-17

Bovernick, Rodney B.

Optical: systems and elements

Signal reflector

33293, G02B 512, G01C 1502

Patent

active

050730053

ABSTRACT:
A target for use in photogrammetry and automated theodolite systems comprising a rigid body having a support surface, a retro-reflective member comprised of a tape-forming substrate having normally a rearward surface and a forward surface an adhesive provided on the rear surface thereof for securing same to the support surface of the target; there being light reflective discrete particles secured adhesively on the forward face of the retro-reflective member; and a mask-forming member having a rearward surface and a forwrd surface, the mask forming member being of greater area than that of the retro-reflective tape and the light reflective means provided thereon. The mask is secured in overlying in relationship upon the light reflective particles and provided with an opening with predetermined area less than that of the light reflective particles so that a predetermined portion of the latter is exposed therethrough.

REFERENCES:
patent: 1732822 (1929-10-01), Wehr et al.
patent: 1959090 (1934-05-01), Wood
patent: 2016333 (1935-10-01), Leeds
patent: 3017713 (1962-01-01), Butler
patent: 4340273 (1982-07-01), Jack et al.

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