Virtual retinal display with expanded exit pupil

Details Virtual retinal display with expanded exit pupil Virtual retinal display with expanded exit pupil

1996-03-29

1997-12-23

Hjerpe, Richard

Computer graphics processing and selective visual display system

Image superposition by optical means

Operator body-mounted heads-up display

345 7, 359 13, 359630, 359631, G09G 500

Patent

active

057011320

ABSTRACT:
A display device is achieved using a simplified optical system which generates an expanded exit pupil without compromising magnification or resolution. Modulated light from a source is converged toward a focal point by an optics subsystem. A scanning subsystem deflects the converging light, and thus the focal point, along a raster pattern to define a curved intermediate image plane. An exit pupil expanding apparatus defines a curved surface which coincides with the curved image plane. Impinging light rays at a given instant in time span a given incidence angle. Exiting light rays span a larger angle. As a result, the exiting light spans a larger surface area of an ensuing eyepiece. In turn an expanded exit pupil occurs beyond the eyepiece. Embodiments of the expanding apparatus include a curved diffractive optical element, fiber optic face plate, lens array and diffuser. The diffractive optical element generates multiple exit pupils, while the other embodiments generate enlarged exit pupils.

REFERENCES:
patent: 3453035 (1969-07-01), Walther
patent: 3547520 (1970-12-01), Lee et al.
patent: 5164848 (1992-11-01), Firth et al.
patent: 5467104 (1995-11-01), Furness, III et al.
patent: 5587836 (1996-12-01), Takahashi et al.
patent: 5596339 (1997-01-01), Furness, III et al.
patent: 5606458 (1997-02-01), Fergason
Tidwell et al., "The Virtual Retinal Display--A Retinal Scanning Imaging System," Virtual Reality World '95; Feb. 1995.

Affiliated with

Also associated with

Rating

Virtual retinal display with expanded exit pupil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Virtual retinal display with expanded exit pupil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Virtual retinal display with expanded exit pupil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1804879