Non-interfering viewing systems for use in catadioptric projection systems

• US 5,267,061 A
• Filed: 06/12/1992
• Issued: 11/30/1993
• Est. Priority Date: 02/20/1990
• Status: Expired due to Term

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: Hughes Aircraft Company (Rtx Corporation)
• Inventors: Haseltine, Eric C., Ansley, David A.
• Primary Examiner(s): Arnold, Bruce Y.
• Assistant Examiner(s): Phan, James
• Application Number:
  US07/899,580
• Time in Patent Office: 536 Days
• Field of Search: 350/174, 350/407, 350/438, 350/538, 350/503-505, 350/619-620, 350/443, 350/172, 350/3.6, 350/132, 350/163, 350/164, 350/166, 350/133, 350/137-138, 362/62, 358/108, 358/113, 359/464, 359/466, 359/471, 359/472, 359/577, 359/580, 359/589, 359/590, 359/722, 359/723, 359/1, 359/15, 359/19
• US Class Current: 359/15
• CPC Class Codes: G02B 2027/012 comprising devices for attenuating parasitic image effects
• CPC Class Codes: G02B 2027/0187 slaved to motion of at least a part of the body of the user, e.g. head, eye
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 5/28 Interference filters
• CPC Class Codes: G09B 9/003 for military purposes and tactics
• CPC Class Codes: G09B 9/326 the image being transformed by optical means

Abstract

Selective light-transmitting filters for use with catadioptic area-of-interest display projectors and projection system provide complementary filters for two or more persons. One of the complementary filters permits all radiance at one predetermined, desired wavelength to be transmitted while rejecting or absorbing all others. The complementary filter for a second viewer transmits substantially all radiance at a second predetermined desired wavelength and absorbs or reflects all others, thus permitting each viewer to see only predetermined, desired displays or parts of a display that are projected simultaneously within the system.

Claims

1. A complementary viewing system for a first and second viewer simultaneously using said system comprising:

means for directing a first image toward the first viewer, while simultaneously directing a second image toward the second viewer, said first image being at least partially in the field of view of the second viewer and the second image being at least partially in the field of view of the first viewer;

first selective light transmitting means positioned in the path of the images directed toward said first viewer, said first selective light transmitting means for transmitting the first image to the first viewer, said first image comprising radiance at substantially only a first predetermined wavelength, and said first selective light transmitting means for rejecting or absorbing substantially all radiance at substantially all other wavelengths; and

second selective light transmitting means positioned in the path of the images directed toward said second viewer, said second selective light transmitting means for transmitting the second image to the second viewer, the second image comprising radiance at substantially only a second predetermined wavelength which is different from said predetermined wavelength and said second selective light transmitting means for rejecting or absorbing substantially all radiance at substantially all other wavelengths, whereby each viewer can simultaneously view a respective image without interference by the other image.

2. system of claim 1 wherein said viewing system includes catadioptric area of interest displays.

3. The system of claim 1 wherein said first transmitting means is a filter.

4. The system of claim 3 wherein said first and second wavelengths are infrared.

5. The system of claim 3 wherein said first selective light transmitting means comprises goggles.

6. The system of claim 3 wherein said second selective light transmitting means comprises goggles.

7. The system of claim 1 wherein said second transmitting means is selected from the group consisting of a single holographic element, multiple holographic elements, or thin films.