Method of eliminating cushion distortion
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 29, 1991
Issued Date -
N/A
app pub date -
Jan 10, 1990
filing date -
May 4, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of eliminating cushion distortion when adjusting reproduction equipment comprising a picture plane, an objective plane, and an original plane. The cushion distortion results optionally from a glass plate being inserted in the path of the rays. The invention is based on the principle that the direction of light is the same irrespective of the direction in which the light moves. By employing this principle a cushion distorted picture can be reproduced as an undistorted picture if an additional glass plate of a suitable thickness is inserted in the path of the rays. The additional glass plate must, however, be situated on the opposite side of the objective. A glass plate supporting the light-sensitive material is not quite plane either which per se can result in a certain degree of cushion distortion. Such a distortion can also be eliminated by the insertion of an additional glass plate in the path of the rays.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully