Portable wide-field optical system with microlenses and fiber-optic image transfer element

• US 6,215,593 B1
• Filed: 11/12/1997
• Issued: 04/10/2001
• Est. Priority Date: 11/13/1996
• Status: Expired due to Fees

• Current Assignee: Ian A. Bruce
• Original Assignee: Ian A. Bruce
• Inventors: Bruce, Ian A.
• Primary Examiner(s): MACK, RICKY LEVERN
• Application Number:
  US08/968,368
• Time in Patent Office: 1,245 Days
• Field of Search: 359/619, 359/621, 359/622, 359/623, 359/624, 359/625, 359/626
• US Class Current: 359/619
• CPC Class Codes: G02B 2027/0132 comprising binocular systems
• CPC Class Codes: G02B 2027/0178 Eyeglass type eyeglass details G02C
• CPC Class Codes: G02B 27/0172 characterised by optical features
• CPC Class Codes: G02B 6/08 with fibre bundle in form of plate

Abstract

An optical system converts a planar image display to a spherical image display focused for close proximity to a human eye, in order to provide a wide viewing field. The optical system includes an array of image source pixels provided by a flat panel display, such as a high resolution liquid crystal display. The image source pixels are received by an array of optical fibers which transfer light from the image source pixels to an image plane section where the optical fibers terminate in a curved surface configuration. The curved surface image projection emanating from the array of optical fibers is received by an array of micro-lenses. Each of the micro-lenses is configured to focus a portion of the light from the curved image plane section onto an eye for viewing the image.

Claims

1. An optical system comprising:

image source means for displaying an image on an array of image elements constituting a first image plane, wherein at least one of said elements provides a light that is different from light that would be provided by another of said image elements, whereby to display said image;

optical means for transferring said light from at least one of said image elements to a non-planar image surface of said optical means; and

lens means for receiving said light from said non-planar image surface of said optical means and focusing the received said light with respect to a predetermined viewer.

2. The optical system according to claim 1, wherein said optical means comprises an array of optical transfer elements, each of said optical transfer elements being optically coupled to at least one of said image elements.

3. The optical system according to claim 2, wherein said lens means comprises an array of lenses, each of said lenses being optically coupled to a different section of said optical transfer element.

4. The optical system according to claim 3, wherein said array of image elements is planar and said array of lenses is convex to the array of image elements.

5. The optical system according to claim 4, wherein said optical means is congruent to said arrays of image elements and lenses.

6. The optical system according to claim 1, wherein said optical means comprises an array of optical fibers, each of said optical fibers being optically coupled to at least one of said image elements.

7. The optical system according to claim 6, wherein said array of optical fibers is fused.

8. The optical system according to claim 1, further comprising a pair of said image display means, optical means and lens means for respective eyes of a user for stereoscopic display of said image.

9. The optical system according to claim 1, further comprising another of said image display means, optical means and lens means as an accurately displaced chord side by side with the first-mentioned thereof for viewing by a single eye, whereby to expand the field of view for the single eye.

10. The optical system according to claim 1, further comprising a mask interposed between said optical means and said lens means, said mask having apertures, each of said apertures being substantially aligned between distinct single corresponding elements of said image means and said lens means.

11. An optical system, comprising:

image display means for displaying an image as a planar array of points of light;

optical means for receiving said planar array of points of light and emitting the received said planar array of points of light as a non-planar array of said points of light; and

lens means for receiving said non-planar array of said points of light and focusing said non-planar array of points of light with respect to a viewing source.

12. The optical system according to claim 11, wherein the image display means is planar, the lens means is convex thereto, and the optical means is complementary to said image display means and lens means.

13. The optical system according to claim 11, wherein a surface of the lens means presented to an eye comprises a curved surface for emulating a visual impression of normal vision.

14. The optical system according to claim 11, wherein said optical means is an array of optical fibers which are fused, each of said points of lights being received into at least one of said optical fibers.

15. The optical system according to claim 14, wherein said optical fibers are fused.

16. The optical system according to claim 11, further comprising another image display means, optical means and lens means for another eye, whereby to provide a stereoscopic display.

17. The optical system according to claim 11, further comprising a mask interposed between said optical means and said lens means, said mask having apertures, each of said apertures being substantially aligned between distinct single corresponding elements of said image means and said lens means.

18. The optical system according to claim 11, further comprising another image display means, optic means, and lens means as an accurately displaced chord side by side with the first-mentioned thereof for viewing by a single eye, whereby to expand the field of view for said single eye.

19. An optical system comprising:

an array of image source pixels for providing light at a first image surface;

an array of optical transfer elements, each one of said optical transfer elements being optically coupled to a different one of said image source pixels and emitting said light at a second image surface shaped differently from said first image surface; and

an array of lenses, each one of said lenses being optically coupled to a different one of light emitting ends of said optical transfer elements, each one of said lenses having a predetermined focal length for emitting said light.

20. The optical system according to claim 19, wherein said optical transfer elements are optical fibers.

21. The optical system according to claim 19, further comprising another said array of image source pixels, array of optical transfer elements and array of lenses for another eye, whereby to provide a stereoscopic display.

22. The optical system according to claim 19, further comprising another said array of image source pixels, array of optical transfer elements and array of lenses as an accurately displaced chord side by side with the first-mentioned thereof for viewing by a single eye, whereby to expand the field of view for said single eye.

23. The optical system according to claim 19, further comprising further comprising a mask interposed between said array of optical transfer elements and said array of lenses, said mask having apertures, each of said apertures being substantially aligned between distinct one of said optical transfer elements and a distinct one of said lenses.