Optical device

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Combined

Patent

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Details

351 50, 350174, G02C 100, G02B 2714

Patent

active

047922230

ABSTRACT:
An optical device provides a unitary, functional eyewear device that enables the viewer to simultaneously receive both primary (on-axis) and secondary (off-axis) images. The optical device includes a primary lens, of a shape and size to be mounted in a frame and worn as traditional eyewear. This primary lens has some inherent reflectivity, transmitting some portion of the light reaching it, and reflecting the remainder. A secondary image mirror portion is preferably mounted along one edge of the primary lens so as to capture at least some desired portion of the light reflected from the primary lens. This secondary image mirror acts more as a true (opaque) mirror, reflecting some significant portion of the light impinging upon it. By proper alignment of this secondry image mirror adjacent the primary lens, some of the light initially reflected by the primary lens is re-reflected back towards the primary lens, where a portion of such light will be transmitted through the primary lens to the viewer's eye. Thus, the viewer is able to perceive two images: the first on-axis (straight ahead) image initially transmitted through the primary lens, and the second off-axis (from above, below, or to the side of the viewer, depending upon the secondady image mirror location) image initially reflected by the primary lens, and then re-reflected by the secondary image mirror.

REFERENCES:
patent: 4647165 (1987-03-01), Lewis
patent: 4733958 (1988-03-01), Gorsich

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