Transparent retroreflective sheets containing directional images

Details Transparent retroreflective sheets containing directional images Transparent retroreflective sheets containing directional images

1985-05-13

1987-08-25

Corbin, John K.

G02B 5128

Patent

active

046888942

ABSTRACT:
A directional image is created in substantially transparent retroreflective sheeting comprising a monolayer of microlenses and a partially light transmissive mirror disposed at the rear surfaces of at least some of said microlenses. The image is created by irradiation of the sheeting with a laser beam to form axial markings associated with at least some of the microlenses. The image may be formed in sheeting which has been applied to a document as an overlay.

REFERENCES:
patent: 3154872 (1964-11-01), Nordgren
patent: 3503315 (1970-03-01), de Montebello
patent: 3801183 (1974-04-01), Sevelin et al.
patent: 4082426 (1978-04-01), Brown
patent: 4099838 (1978-07-01), Cook et al.
patent: 4200875 (1980-04-01), Galanos

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