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Title: US4656506: Spherical projection system
[ Derwent Title ]


Country: US United States of America

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13 pages

 
Inventor: Ritchey, Kurtis J.; Leavenworth, KS 66048

Assignee: None

Published / Filed: 1987-04-07 / 1986-01-27

Application Number: US1986000822648

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;

U.S. Class: Current: 348/039; 348/776; 352/070; 353/082;
Original: 358/087; 358/237; 358/060; 352/070; 353/082;

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

Priority Number:
1983-02-25  US1983000457876
1982-02-08  US1982000346509

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.

Attorney, Agent or Firm: Litman Day & McMahon ;

Primary / Asst. Examiners: Britton, Howard W.; Kostak, Victor R.

INPADOC Legal Status: Show legal status actions

       
Related Applications:
Application Number Filed Patent Pub. Date  Title
US1983000457876 1983-02-25       
US1982000346509 1982-02-08       


       
Parent Case:

CROSS-REFERENCE TO RELATED APPLICATIONS
    This is a continuation-in-part of Ser. No. 457,876 for REAR SCREEN PROJECTION SYSTEM AND METHOD filed Feb. 25, 1983 and now abandoned, which was a continuation-in-part of Ser. No. 346,509 for REAR SCREEN PROJECTION SYSTEM AND METHOD filed Feb. 8, 1982 and now abandoned.

Family: None

First Claim:
Show all 15 claims
What is claimed and desired to be secured by Letters Patent is as follows:     1. An image projection system comprising:
  • (a) an opaque enclosure;
  • (b) rear projection screen means supported within said enclosure, said screen means including at least a portion which is spherically shaped, the spherical portion being substantially greater than a hemisphere, said screen means being adapted to have images projected onto an external surface and to have said images viewed from an internal surface of said screen means;
  • (c) image projection means including a plurality of projection lens sets to simultaneously project a plurality of images onto said screen means;
  • (d) said screen means having an extent such that a viewer views a respective portion of said images in any viewable direction surrounding the head of the viewer;
  • (e) said screen means having a diameter such that the head and upper body of a viewer is surrounded by said screen means;
  • (f) said screen means having an entry aperture at a lower side thereof to admit the head and upper body of a viewer whereby the eyes of the viewer may be positioned at the approximate center of said screen means;
  • (g) said image projection means including a plurality of sets of mirrors positioned within said enclosure to reflect images from said projection lenses to respective areas of said screen means; and
  • (h) said screen means being rotatably supported within said enclosure for rotation about a vertical axis such that a viewer positioned therein may rotate said screen means with respect to said enclosure to view images projected onto said screen means in any desired azimuthal direction.


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Forward References: Show 76 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (76)   |   Backward references (25)   |   Citation Link

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PDF
Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 7pp US2299682  1942-10 Conant   Apparatus and method for taking and projecting pictures
Get PDF - 4pp US2320760  1943-06 Surre   Image producing apparatus
Get PDF - 4pp US2779237* 1957-01 Smith    
Get PDF - 6pp US2861806* 1958-11 Disney    
Get PDF - 11pp US3055265* 1962-09 Smith    
Get PDF - 9pp US3107577  1963-10 Adams   Panoramic motion picture projection apparatus
Get PDF - 6pp US3246943  1966-04 Holt   Method of and apparatus for image projection
Get PDF - 10pp US3248165  1966-04 Marks et al.   Moving screen projection system
Get PDF - 4pp US3292491  1966-12 Hourdiaux   Picture projection systems
Get PDF - 4pp US3311017* 1967-03 Eckholm    
Get PDF - 6pp US3695751  1972-10 Watanuki  The MIDORI-KAI Co., Ltd. HEMISPHERICAL MOTION PICTURE SCREEN
Get PDF - 4pp US3768899  1973-10 Adiego De La Parra  Empresa Nacional De Optica, S.A. MULTIPLE SLIDE PROJECTOR
Get PDF - 10pp US3807849  1974-04 Lobb  Redifon Limited VISUAL DISPLAY ARRANGEMENTS
Get PDF - 7pp US3867024  1975-02 Smith  United States T.R.A.D. Corporation RACK ASSEMBLY
Get PDF - 13pp US4100571  1978-07 Dykes et al.  The United States of America as represented by the Secretary of the Navy 360° Non-programmed visual system
Get PDF - 18pp US4127322  1978-11 Jacobsen et al.  Hughes Aircraft Company High brightness full color image light valve projection system
Get PDF - 6pp US4164829  1979-08 Sadler   Inflatable structure
Get PDF - 9pp US4167311  1979-09 Pund  McDonnell Douglas Corporation Projection system and process
Get PDF - 7pp US4181918  1980-01 Warman et al.   Television receiver projection system
Get PDF - 9pp US4191456  1980-03 Hong et al.  Hughes Aircraft Company Optical block for high brightness full color video projection system
Get PDF - 7pp US4208676  1980-06 Berwick et al.  Berwick; Leonard J. Television projection system
Get PDF - 8pp US4234894  1980-11 Tokumaru et al.  Minolta Camera Kabushiki Kaisha Reflecting optical system for projection television
Get PDF - 34pp US4266242  1981-05 McCoy  Vital Industries, Inc. Television special effects arrangement
Get PDF - 12pp US4334245  1982-06 Michael  Micro Consultants Limited T.V. Special effects generator
Get PDF - 15pp US4355328  1982-10 Kulik  The United States of America as represented by the Secretary of the Navy 360 Degree closed circuit television system
  * some details unavailable
       
Foreign References:
Buy
PDF
Publication Date IPC Code Assignee   Title
Buy PDF FR2445567 1980-07  G09B 9/00 ETUDES REALISA NUCLEAIRES PROCEDE DE PROJECTION, SUR GRAND ECRAN, D'IMAGES SYNTHETISEES PAR ORDINATEUR, ET DISPOSITIF DE MISE EN OEUVRE 
Buy PDF GB1047728 1966-11  G03B 37/00 THOMAS GANZ AND ANNA GANZ Projector installation 


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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