Optics: measuring and testing – Plural test
Reexamination Certificate
2007-10-10
2009-10-20
Evans, F. L (Department: 2877)
Optics: measuring and testing
Plural test
Reexamination Certificate
active
07605911
ABSTRACT:
Apparatus and method for characterizing perceived visual quality of holographic materials, such as diffraction gratings. A white light source directs a collimated beam onto an embossed material. The first order diffracted light strikes a white background directly in view of a digital camera, which records an image. The image is analyzed to calculate total color intensity of the diffracted light and an estimate of the color distinctness. The data is compared to other samples to determine relative visual quality.
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Grygier Robert K.
Wieloch Kelan
Applied Extrusion Technologies, Inc.
Caesar Rivise Bernstein Cohen & Pokotilow Ltd.
Evans F. L
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