1976-11-01
1979-04-17
Griffin, Donald A.
354106, 354203, G03B 3900, G03B 1724, G03B 1700
Patent
active
041497880
ABSTRACT:
A platen for forming reseau marks on a photographic film for a mapping camera or the like which includes a substantially flat platen body provided with a plurality of apertures in each of which is positioned a projector, the apertures being arranged in a pattern corresponding to the pattern of the reseau marks to be formed on the film so that light from a source on one side of the platen is formed into a light beam by the projectors representative of the reseau mark and forms an image on film held by a vacuum against the other side of the platen and which is also exposed to an optical image by the camera.
REFERENCES:
patent: 1490487 (1924-04-01), Schmidt
patent: 1536335 (1925-05-01), Folmer
patent: 1936923 (1933-11-01), Traenkle
patent: 3029717 (1962-04-01), Hildebrandt
patent: 3266393 (1966-08-01), Chitayat
patent: 3603974 (1971-09-01), Copeland
patent: 3720146 (1973-03-01), Yost
Aerial Camera for Photogrammetric Research, Nov. 1965, R. Matos, pp. 978-983, Photogrammetric Engineering.
American Society of Photogrammetry, Oct. 1978, Paper, L. Perry, pp. 431-438.
An NOS-Developed Backlighted Reseau and its Effect on Coordinate Refinement.
Geodetic Services, Inc.
Griffin Donald A.
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