Headwear-mounted periscopic display device

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks

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Details

350287, 350638, 351158, G02C 714, G02C 904, G02B 2702, G02B 2732

Patent

active

047535148

ABSTRACT:
A periscopic display device for close up viewing of a display. The device includes means for generating a display, such as an LED, LCD, or ELD display, and periscopic means consisting of a body of optically clear material having a reflecting prism portion and a collimating lens portion. The prism portion includes a first planar surface positioned parallel and adjacent to the display and a plurality of optically aligned reflecting surfaces for transmitting a reflected image of the display. The collimating lens portion consists of a convex lens having a focal point at the display and is positioned to receive the reflected image for focusing the image at optical infinity. Preferably the body includes a mounting portion in which the display generating means is embedded. The display device is lightweight, waterproof, dustproof, and is easily mounted on the eyeglass frames, visor, or headband of the wearer.

REFERENCES:
patent: D195365 (1963-06-01), Holt
patent: 3216308 (1965-11-01), Northcutt
patent: 3229580 (1966-01-01), Mitchell
patent: 3524710 (1970-08-01), Rickert
patent: 4052073 (1977-10-01), Miller
patent: 4550984 (1985-11-01), Reymond
"Eyeglass Heads-Up Display", H. W. Upton, J. R. Goodman, Bell Helicopter Textron, Fort Worth, TX, presented at the Society for Information Display (SID) International Seminar/Symposium/Exhibition, New York City, New York, 4/28/81, and published in the SID 1981 Digest, pp. 48-49.
"Eyeglass Heads-Up Display", H. W. Upton, J. R. Goodman, Bell Helicopter Textron, Fort Worth, TX, Proceedings of the SID, vol. 23/2, 1982, pp. 77-80.

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