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 Title: |
US4656506:
Spherical projection system
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Ritchey, Kurtis J.; Leavenworth, KS 66048
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| Assignee: |
None
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| Published / Filed: |
1987-04-07
/ 1986-01-27
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| Application Number: |
US1986000822648
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| IPC Code: |
Advanced:
G03B 21/00;
G09B 9/30;
G09B 9/32;
G09F 19/18;
Core:
G09B 9/02;
G09F 19/12;
more...
IPC-7:
H04N 9/31;
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| U.S. Class: |
Current:
348/039;
348/776;
352/070;
353/082;
Original:
358/087;
358/237;
358/060;
352/070;
353/082;
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| Field of Search: |
434/040,43,44,284
272/1 C,16,17,18
358/060,87,104,237,238,239,231
350/125
353/037,82
354/094,95
352/069,70,71
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| Priority Number: |
| 1983-02-25 |
US1983000457876 |
| 1982-02-08 |
US1982000346509 |
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| Abstract: |
A spherical projection system includes a spherical rear projection screen assembly of an extent such that a viewer sees projected images in any viewable direction, a plurality of image projectors which cooperate to project portions of a continuous panoramic scene onto all the viewable surfaces of the screen assembly, sets of mirrors to reflect the images onto associated areas of the screen assembly, and an opaque enclosure which houses the screen assembly, mirror sets, and image projectors. In one embodiment of the system, the screen assembly includes a truncated spherical portion which is sized to receive a viewer entirely within and which is closed by a planar rear projection screen which forms a floor to support the viewer. A separable section of the spherical screen portion is mounted on a track for sliding movement to allow entry and exit by the viewer. In another embodiment of the system, the spherical screen is sized to receive only the head and upper body of the viewer. The spherical screen is rotatably mounted to allow the viewer to turn it to see all portions of the projected images.
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| Attorney, Agent or Firm: |
Litman Day & McMahon ;
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| Primary / Asst. Examiners: |
Britton, Howard W.; Kostak, Victor R.
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| INPADOC Legal Status: |
Show legal status actions
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| Related Applications: |
| Application Number |
Filed |
Patent |
Pub. Date |
Title |
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| US1983000457876 | 1983-02-25 |
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| US1982000346509 | 1982-02-08 |
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| Foreign References: |
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| Other References: |
P. Gessler, "Polyvisions", Camera; Jun. 1964, pp. 13-18.
T. Herzog, Pneumatic Structures, Crosby Lockwood Staples, London, 1977, pp. 149, 158, & 159.
Model IMI-3000, -3000GG, & Magni Image I by Image Magnification, Inc, The 1981 Video Products Guide, vol. III, p. 230, (published by Midwest Corporation).
Model 200-3 Video Production Switcher by Industrial Sciences, Inc., The 1981 Video Productions Guide, vol. III, p. 230, (published by Midwest Corporation).
"Squeezer", Video Image Compression System, by Precision Echo, California.
W. E. Good, "Recent Advances in the Single-Gun Color Television Light-Valve Projector", Simulators & Simulation, vol. 59, pp. 96-99, Society of Photo-Optical Instrumentation Engineers.
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