Autostereoscopic projection viewer
View Patent ↗An autostereoscopic viewer is employed to produce aberration corrected images to simulate a virtual presence by employing pairs of projector optical components coupled with an image corrector plate and a field lens. Images are designed with magnifications and optical qualities and positioned at predetermined eyezones having controlled directional properties. The viewer's eyes are positioned in these eyezones. The size of these zones is related to the aperture of the projection lenses, the magnification produced by the Fresnel(s), and the optical properties and position of the image corrector plate.
1. An autostereoscopic projection viewer, comprising:
one or more pairs of projector lenses configured to correspond to one or more pairs of respective projection displays,
an image corrector plate arranged about an image plane of each said pair of projector lenses, wherein said image corrector plate is adapted to optimize two or more optical parameters selected from: chromatic dispersion, predetermined phase perturbation, and eyebox projector optimization; and
a field lens, wherein said field lens is arranged at a predetermined distance from said projector lenses and said image corrector plate to produce one or more predetermined magnified stereoscopic aberration corrected and optimized images of said projection displays at predetermined one or more pairs of optical eyezones.
2. The viewer of claim 1 , wherein said image corrector plate includes a volume hologram.
3. The viewer of claim 1 , wherein said field lens includes a pair of Fresnel lenses adapted to operate collectively as a field lens and having a respective lens separation from about 3 to about 5 inches to reduce moiré effects.
4. The viewer of claim 3 , wherein said field lenses include a zonal plate.
5. The viewer of claim 1 , wherein said optical aberrations includes at least one from: coma, spherical, astigmatism, distortion, curvature of field and chromatic.
6. The viewer of claim 1 , wherein said viewer includes a folded geometry.
7. The viewer of claim 1 , wherein said projector lenses have a square geometry.
8. The viewer of claim 1 , wherein said projection displays include at least one from: CRT's, transparencies, liquid crystal spatial light modulators, transparencies, plasma sources, digital light projectors, flat panel monitors, photographs.
9. The viewer of claim 1 , wherein said transmission displays include one or more computer generated images.
10. The viewer of claim 1 , wherein said images include keystone correction.
11. An autostereoscopic projection viewer, comprising:
up to about three pairs of projector lenses configured to correspond respectively to at least three pairs of projection displays,
an image corrector plate arranged at an optical image plane for each said pair of projection lenses, wherein said image corrector plate is capable of correcting for predetermined optical aberrations; and
a pair of Fresnel lenses adapted to operate collectively as a field lens, wherein said pair of Fresnel lenses are arranged at predetermined distances from said projection lenses and said image corrector plate to produce one or more predetermined stereoscopic aberration corrected images of said projection displays at predetermined one or more pairs of optical eyezones.
12. An autostereoscopic projection viewer, comprising:
a pair of projector lenses, configured to correspond to a respective pair of projection displays and direct optical rays from said projection displays,
a prismatic Fresnel beamsplitter, arranged substantially about an image plane of each said pair of projector lenses and adapted to produce a plurality of predetermined optical eyezones,
an image corrector plate arranged to receive and redirect said optical rays received from said Fresnel beamsplitter, wherein one or more aberrations produced by said viewer are corrected; and
a field lens arranged at predetermined distances from said projection lenses and said Fresnel beamsplitter to produce one or more predetermined magnified stereoscopic aberration corrected images of said projection displays at said eyezones.
13. The viewer of claim 12 , wherein said viewer includes an optical diffuser.
14. The viewer of claim 12 , wherein said image corrector plate is capable of being constructed as a holographic optical diffuser.
15. The viewer of claim 14 , wherein said image corrector plate includes a volume hologram.
16. The viewer of claim 12 , wherein said viewer includes a folded geometry.
17. The viewer of claim 12 , wherein said field lens includes a zonal plate.
18. The viewer of claim 12 , wherein said projector lenses have a square geometry.
19. The viewer of claim 12 , wherein said viewer includes a lenticular array, said array having a plurality of lenticules extending laterally such that optical rays directed from said projection displays are displaced vertically.
20. The viewer of claim 12 , wherein said projection displays include at least one from: CRT's, transparencies, liquid crystal spatial light modulators, transparencies, plasma sources, digital light projectors, flat panel monitors, photographs.
21. The viewer of claim 12 , wherein said transmission displays include one or more computer generated images.
22. The viewer of claim 12 , wherein said field lens includes a pair of Fresnel lenses adapted to operate collectively as a field lens and having a respective lens separation from about 3 to about 5 inches to reduce moiré effects.