Flashing retroreflecting device

Details Flashing retroreflecting device Flashing retroreflecting device

1975-09-12

1977-05-17

Corbin, John K.

350211, 350271, 350285, G02B 512

Patent

active

040238881

ABSTRACT:
A reflecting device providing a flashing reflection of light incident on the device toward an intended observer includes a converging Fresnel lens for receiving light directed onto the device and for focusing the light within the focal plane of the lens, through which plane a reflector is periodically moved to intermittently reflect the light. In one embodiment, the reflector is positioned to retroreflect the light back through the lens toward an observer positioned adjacent the source of light. In another embodiment, the reflector is positioned to reflect light transmitted through a first Fresnel lens toward another Fresnel lens so as to be visible by an observer of the other lens.

REFERENCES:
patent: 2503509 (1950-04-01), Rader
patent: 2551193 (1951-05-01), Williams
patent: 3528721 (1970-09-01), La Londe
patent: 3551024 (1970-12-01), Priest, Jr.
patent: 3758190 (1973-09-01), Douglas
patent: 3813146 (1974-05-01), Burch et al.
patent: 3814500 (1974-06-01), Ebenbichler
patent: 3861785 (1975-06-01), Barbour

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