Optical system for virtual reality helmet

Details Optical system for virtual reality helmet Optical system for virtual reality helmet

1993-05-06

1994-09-13

Ben, Loha

Optical: systems and elements

Lens

With support

359813, 359742, 359630, 345 7, 345 8, G02B 702

Patent

active

053474007

ABSTRACT:
The present invention provides an optical system for a virtual reality head mounted display with improved image quality, enlarged field of view, and enhanced adjustability. In one embodiment, the optical system comprises a housing coupled to the frame of the head mounted display, a pair of displays mounted to the housing each defining a visual plane, and first and second lenses mounted between each of the displays and the user's eyes. The lenses are mounted to the housing such that each lens is disposed at an angle of between 1.degree. and 15.degree. relative to the visual plane. The lenses are also mounted such that the interoptic distance between the lenses may be adjusted. The optical system also has a unique lens construction including a standard Fresnel lens mounted in parallel to a low-diffraction Fresnel lens, resulting in substantially reduced diffractive interference.

REFERENCES:
patent: 3865468 (1975-02-01), Holcomb
patent: 4968123 (1990-11-01), Fournier, Jr. et al.
patent: 5001786 (1991-03-01), Copeland
patent: 5091719 (1992-02-01), Beamon, III
patent: 5184231 (1993-02-01), Ellis

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