Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1994-03-02
1996-04-02
Loney, Donald J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
428141, 428156, 428913, 430 13, 430 14, 430 16, B32B 300
Patent
active
055039022
ABSTRACT:
A light control material for displaying black-and-white and color images by forming light traps in a layer of photopolymer at selected locations. The photopolymer layer constitutes a master from which embossments can be produced. An embossment which displays the image can be produced from the master by a soft embossing procedure. The light traps are formed in the master by reactively ion etching a layer of cured photopolymer at selected locations to create fields of tapered structures. An embossment generated from the master contains fields of tapered structures which correspond to those created in the master. The surface of the embossment which includes the fields of tapered structures is coated with a reflective material such as metal. Light which enters the fields is reflected within the fields of tapered structures until substantially all of the light has been absorbed. Light which does not enter the fields is reflected. The light traps correspond to the black areas of a black-and-white image whereas the reflective areas correspond to the white areas of the black- and-white image.
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Hurt Mark J.
Steenblik Richard A.
Applied Physics Research, L.P.
Loney Donald J.
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