Patent
1989-12-29
1991-06-25
Gellner, Michael L.
354188, 354189, 3541951, G03B 506, G03B 508, G03B 1910
Patent
active
050271431
ABSTRACT:
A preferred embodiment of a photographic camera comprises a lens standard supporting an optical lens and a screen standard supporting an image screen. At least one of the lens standard and screen standard is movable to vary a distance along the longitudinal camera axis by which they are separated, and one of the lens and screen is rotatable about an axis normal to its optical axis. A reel means, including a drum rotatable about a drum axis for coiling a flexible extension member, is fixed in geometric relation to one of the standards. Rotation signaling means generates a rotation signal in response to rotation of the drum means. A distal end portion of the flexible extension member is fixed in relation to the other of the standards such that, when the distance is decreased or increased, the drum means is caused to rotate about the drum axis. A computer receives the rotational signal and computes a length indicative of a difference in the length by which the first and second standard are separated when a first and second point in the object plane are brought into focus on the image screen and computes an angle through which the lens or screen must be rotated to bring the complete object plane into focus in compliance with Sheimpflug's law.
REFERENCES:
patent: 3825938 (1974-07-01), Koch
patent: 4564277 (1986-01-01), Koch
patent: 4692007 (1987-09-01), Vogt
patent: 4763147 (1988-08-01), Vogt
Horseman LX-C Camera, advertisement in Studo Photography Magazine, Jan. 1990.
Horseman L-Series Monorail View Cameras, sales brochure No. 89630000, no date.
Clark, III Clarence R.
Sanso David W.
Gellner Michael L.
Oxenham J. Preston
LandOfFree
Apparatus and method for focusing a photographic camera does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for focusing a photographic camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for focusing a photographic camera will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1043373