System and method for visual quality characterization of holographic materials
AssigneeApplied Extrusion Technologies, Inc.
InventorsKelan Wieloch, Robert K. Grygier
Life of this patent
Estimating the term…
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.
Claims13
A method for characterizing the perceived visual quality of a holographic material, which, when illuminated, produces diffracted light and scattered light, the method comprising:
- directing light from a collimated white light source onto the holographic material;
- performing a measurement of the diffracted light;
- performing a measurement of the scattered light;
- and
- comparing said measurement of diffracted light and measurement of scattered light to measurements for like holographic materials.
A method for characterizing the perceived visual quality of a holographic material, which, when illuminated, produces diffracted light and scattered light, the method comprising:
- directing light from a collimated white light source onto the holographic material;
- projecting the diffracted and the scattered light onto a scattering surface;
- creating an image of the diffracted and scattered light projected onto a scattering surface;
- measuring said image to produce a measurement of the diffracted light and a measurement of the scattered light;
- and
- comparing said measurement of diffracted light and measurement of scattered light to measurements for like holographic materials.
An apparatus for characterizing the perceived visual quality of a holographic material which, when illuminated, produces diffracted light and scattered light, comprising:
- a white light source to produce a collimated light beam;
- a scattering surface;
- and
- a light measurement device,
- wherein said collimated white light beam is directed to the holographic material, the diffracted light and the scattered light are projected onto said scattering surface and said light projected onto said scattering surface is measured with said light measurement device.
Dependencies are inferred from the claim text.