Fiber optic coupled helmet mounted display system

• US 4,743,200 A
• Filed: 11/13/1984
• Issued: 05/10/1988
• Est. Priority Date: 11/13/1984
• Status: Expired due to Term

• Current Assignee: CAE Incorporated
• Original Assignee: CAE USA Incorporated (CAE Incorporated)
• Inventors: LaRussa, Joseph A., Welch, Brian L.
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US06/670,913
• Time in Patent Office: 1,274 Days
• Field of Search: 434/43, 434/44, 340/705
• US Class Current: 434/43
• CPC Class Codes: G02B 2027/0123 comprising devices increasing the field of view
• CPC Class Codes: G02B 2027/0145 creating an intermediate image
• CPC Class Codes: G02B 2027/0169 Supporting or connecting means other than the external walls
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G09B 9/307 by helmet-mounted projector or display G09B9/36 takes precedence; optical parts of head-up displays G02B27/01
• CPC Class Codes: G09B 9/326 the image being transformed by optical means

Abstract

A fiber optic helmet mounted display system produces a replica of an image derived from an image source for viewing by an observer. The system includes a wide angle eyepiece mounted on the helmet in the line of sight of the observer. Fiber optic cable means transmit the image from the image source to the eyepiece whereby to produce the replica of the image in the line of sight of the observer, the replica appearing to originate at a distance.

Claims

1. A fiber optic helmet mounted display system for producing a replica of an image derived from an image source for observation by an observer, comprising:

a first relay lens having an input;

fiber optic cable means having an input end and an output end;

said first relay lens being disposed between said source and the input end of said fiber optic cable means;

a second relay lens disposed at the output end of said fiber optic cable means; and

a wide angle eyepiece;

said second relay lens being disposed between the output end of said fiber optic cable means and said wide angle eyepiece;

whereby said fiber optic cable means transmits said image from said image source to said eyepiece;

whereby to produce said replica of said image in the line of sight of said observer and, said replica appearing to originate at a distance.

2. A system as defined in claim 1 and further including image enhancement means;

whereby a single picture element or pixel of said image is distributed over any individual fibers of said fiber optic cable at the input end of the cable by said first relay lends, and recombined at the output end of said cable by said second relay lens.

3. A system as defined in claim 2 and further including a beam splitter in the optical path between said eyepiece and said second relay lens.

4. A system as defined in claim 3 wherein said eyepiece comprises a PANCAKE WINDOW™

.

5. A system as defined in claim 3 wherein said eyepiece comprises a wide field optical viewer with concave eyepiece.

6. A system as defined in claim 4 and having means for producing a low resolution wide field replica and a high resolution inset.

7. A system as defined in claim 5 and having means for producing a low resolution wide field replica and a high resolution inset.