Photocopying – Projection printing and copying cameras – Stereoscopic
Patent
1977-07-15
1979-10-09
Hix, L. T.
Photocopying
Projection printing and copying cameras
Stereoscopic
355 77, 353 6, G03B 2732
Patent
active
041704150
ABSTRACT:
In an orthophotograph recorder, a three dimensional optical model of a terrain produced by a stereo pair of aerial transparencies is projected onto an imaging plate. The optical model is scanned by an optically produced reference point while the height of the viewing plate is manually adjusted by the operator to maintain the reference on the apparent ground level of the terrain. The scanning motion of the reference point, as well as the height of the imaging plate, is digitally encoded and formatted into data blocks. Each block of digital data represents an individual scan line on the optical model, and is characterized by a starting coordinate and incremental coordinate data. This data format minimizes storage requirements and permits editing of individual scan lines. The encoded data are scaled and stored on magnetic tape to be used to control exposure of a photosensitive sheet in an orthophotograph printer. The printer comprises a light projector located above a platen carrying the photosensitive sheet. A transparency corresponding to the optical model is located between the projector and platen. Adjacent the photosensitive sheet, there is a screen containing an aperture which is moved parallel to the platen to expose the photosensitive sheet to the projected optical model in scanning fashion. During scanning, the height of the platen is adjusted in accordance with the stored digital data so that the sheet portion being exposed is always kept in intersection with the apparent ground plane of the optical model.
REFERENCES:
patent: 3199111 (1965-08-01), Jennings et al.
patent: 3694072 (1972-09-01), Danko, Jr. et al.
patent: 3904816 (1975-09-01), Taudt et al.
patent: 3915569 (1975-10-01), Polzleitner
patent: 3924244 (1975-12-01), Seitz
Dando Thomas O.
Kuck Kenneth D.
Lemeshewsky George P.
Shope, Jr. Arthur R.
Brady W. J.
Gardiner Donald A.
Hix L. T,.
Sadowsky Gersten
The United States of America as represented by the Secretary of
LandOfFree
System for producing orthophotographs does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for producing orthophotographs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for producing orthophotographs will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1963578