Toric reflector display

• US 4,026,641 A
• Filed: 12/30/1975
• Issued: 05/31/1977
• Est. Priority Date: 12/30/1975
• Status: Expired due to Term

• Current Assignee: The United States Of America As Represented By The Secretary Of The Army
• Original Assignee: The United States Of America As Represented By The Secretary Of The Army
• Inventors: Freeman, Charles F., Bosserman, David A.
• Primary Examiner(s): Evans, F. L.
• Application Number:
  US05/645,501
• Time in Patent Office: 518 Days
• Field of Search: 350/174, 350/290, 350/291, 350/293, 350/296, 350/298, 350/191, 350/301, 350/302
• US Class Current: 359/869
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 2370/334 Projection means
• CPC Class Codes: G02B 2027/0143 the two eyes not being equipped with identical nor symmetrical optical devices
• CPC Class Codes: G02B 2027/0169 Supporting or connecting means other than the external walls
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 5/10 with curved faces
• CPC Class Codes: G02B 5/28 Interference filters

Abstract

A toric reflector display comprising a toric concave reflector with a toriconvex object surface, an auxiliary display device, and an optical transfer device which transfers information from the auxiliary display to the toric object surface. The toric reflector display provides an observer with a distant virtual image of the information. The virtual image of the information may be viewed superimposed on the real world if the toric concave reflector is semi-opaque.

Claims

1. A head gear mounted toric reflector display system which forms a wide field of view virtual image in the visual space of an observer, said display system comprising:

a concave toric reflector in said visual space of an observer, said concave toric reflector having a reflecting surface that is an off-aperture section of a toric reflector having one long radius of curvature and one short radius of curvature for subtending said wide field of view virtual image;

an auxiliary display device which provides information to be viewed by said observer;

a convex toric object surface facing said concave toric reflector and which approximates said reflecting surface of said concave toric reflector; and

an optical transfer device which transfers information from said auxiliary display device to said convex toric object surface as object points of information wherein light from said object points travels directly to said concave toric reflector as diverging beams and are collimated by said concave toric reflector into parallel beams which fill the exit eye pupil of said observer.

2. A display system as set forth in claim 1 wherein said optical transfer device is a fiber optic plate.

3. A display system as set forth in claim 1 wherein said concave toric reflector is a front surface reflector.

4. A display system as set forth in claim 1 wherein said concave toric reflector is a Mangin reflector.

5. A display system as set forth in claim 1 wherein said toric reflector has an opaque metallic reflecting surface.

6. A display system as set forth in claim 1 wherein said toric reflector has a semiopaque metallic reflecting surface.

7. A display system as set forth in claim 1 wherein said toric reflector has a multilayer interference film on the reflecting surface.

8. A display system as set forth in claim 1 wherein any of the two radii of curvature of said concave toric reflector and the two radii of curvature of said toric object surface have aspheric deviations.

9. A display system as set forth in claim 1 wherein said optical transfer device is the output face of said auxiliary display device.

10. A display system as set forth in claim 1 wherein said optical transfer device is a fiber optic plate having an input which conforms to said auxiliary display device requirements and an output which forms said convex toric object surface.