Semi-transparent reflective layer for a phase hologram
First Claim
Patent Images
1. A phase hologram, comprising:
- (a) a substrate having a holographic microtexture embossed therein on at least a portion of a surface thereof; and
(b) a reflective layer of tin tungsten oxide deposited upon said embossed microtexture, said reflective layer having a refractive index different from that of said substrate and being at least semi-transparent.
1 Assignment
0 Petitions
Accused Products
Abstract
A phase hologram is embossed in a mylar web having a tin tungsten oxide reflective layer deposited upon. The embossed microtexture produces a hologram that is semi-transparent, thereby allowing the visualization of indicia underlying the hologram.
118 Citations
16 Claims
-
1. A phase hologram, comprising:
-
(a) a substrate having a holographic microtexture embossed therein on at least a portion of a surface thereof; and (b) a reflective layer of tin tungsten oxide deposited upon said embossed microtexture, said reflective layer having a refractive index different from that of said substrate and being at least semi-transparent. - View Dependent Claims (2, 3)
-
-
4. A method for producing holograms, comprising the steps of:
-
(a) embossing a substrate with a holographic microtexture on at least a portion of a surface thereof; and (b) depositing a reflective layer of tin tungsten oxide upon said holographic microtexture, said reflective layer having a refractive index different from that of said substrate and being at least semi-transparent. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11)
-
-
12. An authenticated document, comprising:
-
(a) a substrate bearing encoded data; and (b) a holographic overlay having a semi-transparent reflective layer of tin tungsten oxide affixed to said substrate overlying at least a portion of said encoded data to prevent non-destructive separation of said overlay from said substrate, said overlay being at least semi-transparent to permit visualization of said encoded data through said overlay. - View Dependent Claims (13, 14, 15, 16)
-
Specification