Optics: measuring and testing – Contour plotting
Patent
1979-05-04
1981-08-04
Evans, F. L.
Optics: measuring and testing
Contour plotting
350 10, 350136, G01C 1112
Patent
active
042819237
ABSTRACT:
A stereoplotter with carriages and two distinct lens systems for viewing a pair of overlapping aerial photographic transparencies positioned on the carriages to produce a three dimensional optical model visible at the binocular viewer of the stereoplotter. The carriages are independently adjustable in two directions, and respond to both manual and computer control. A floating mark, or reticle, is introduced into the plane of the photographic transparency by each lens system. The operator, by manipulating manual or other controls, moves the floating marks into an apparently fused, or overlapping relationship, and then moves the fused mark along the surface of the optical model to generate a moving trace in X, Y and Z coordinates.
Panoramic aerial photographs have posed significant problems for known stereoplotters, for an overlapping pair of photographs, to be viewed without distortion, required different magnification for each lens system. The different magnifications, however, caused one floating mark, or the other, to change size relative to the amount of magnification and therefore to overlap or obliterate its counterpart so that the Z coordinate of the optical model could not be accurately determined.
The instant invention interconnects the zoom lens and reticle utilized in each lens system in the stereoplotter in such a manner that the magnification of the zoom lens is inversely related to the effective area of the variable area diaphragm, the projected image of which constitutes the floating mark, or reticle. Consequently, if the magnification of the zoom lens is doubled, the effective area of the variable area diaphragm is halved, and vice versa.
REFERENCES:
patent: Re29194 (1977-04-01), Ambrose et al.
patent: 2847906 (1958-08-01), Santoni
patent: 3116555 (1964-01-01), Helava
patent: 3251283 (1966-05-01), Wood
patent: 3418034 (1968-12-01), Ambrose
patent: 3446553 (1969-05-01), Somazzi
patent: 3450475 (1969-06-01), Mondon
patent: 3465444 (1969-09-01), Blachut et al.
patent: 3486820 (1969-12-01), Blachut et al.
patent: 3495891 (1970-02-01), Lee
patent: 3663103 (1972-05-01), Collins
patent: 3692406 (1972-09-01), Blachut et al.
patent: 3732008 (1973-05-01), Lasalle
patent: 3738746 (1973-06-01), Lewis et al.
patent: 3879107 (1975-04-01), Chaban
Chase Geoffrey L.
Evans F. L.
Hoffman Martin P.
O.M.I. Corporation of America
Wasson Mitchell B.
LandOfFree
Interconnected, adjustable zoom lens and reticle utilized in len does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interconnected, adjustable zoom lens and reticle utilized in len, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interconnected, adjustable zoom lens and reticle utilized in len will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-237352