Optical viewer with an aperture transformer

Details Optical viewer with an aperture transformer Optical viewer with an aperture transformer

1998-01-16

1999-07-13

Epps, Georgia

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

G02B 2714

Patent

active

059234768

ABSTRACT:
An optical system for reflecting light from a display screen into an aperture which is typically the pupil of a person wearing a head-mounted display system in which the display screen is mounted to the side of the viewer's eye. The optical system includes a turning optical assembly having a plurality of planar facets disposed on a curved surface opposite to the aperture, the planes of the facets being parallel to one another. Light from the display entering an input port impinges on the facets such that the light is reflected by the facets into the aperture. The curved surface has a curvature chosen such that the fill factor for each of the facets is substantially the same as that for the others of the facets. In one embodiment of the present invention, the curved surface is a cylinder having a hyperbolic cross-section.

REFERENCES:
patent: 4220400 (1980-09-01), Vizenor
patent: 4806011 (1989-02-01), Bettinger

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