Optically annotatable recording film

Details Optically annotatable recording film Optically annotatable recording film

1980-09-19

1982-06-01

Ives, P.

Radiation imagery chemistry: process, composition, or product th

Micrography, process, composition, or product other than...

430 22, 430 12, 346 76L, 428913, 428199, 428200, 428202, 428204, 428520, 428523, 428522, 353 44, 350353, G03C 1100, G03C 1102

Patent

active

043328725

ABSTRACT:
In a device for projecting a primary image from a transparency along an optical path and for altering the image by selectively directing a writing light source reversably along the optical path toward the transparency, a transparent recording film includes a pre-recorded primary image layer and a secondary layer annotatable by the marking light. The two layers are congruent, and in one embodiment comprise superimposed substrates which are joined mechanically. In another embodiment, the two layers are coated jointly on one substrate, and in a further embodiment the two layers are intimately mixed to form one bifunctional layer. Various means are disclosed whereby the primary image layer is unaffected by the marking light, and the annotatable secondary layer is unaffected by the projection illumination.

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patent: 4076371 (1978-02-01), Braun et al.
patent: 4118229 (1978-10-01), Stromberger
patent: 4191457 (1980-03-01), Zingher
patent: 4199615 (1980-04-01), Wacks et al.
patent: 4214249 (1980-07-01), Kasai et al.

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