Viavi Solutions Inc.

Jds Uniphase Corporation

Optical Coating Laboratory, Inc.

Robert B Sargent

Paul G Coombs

Cornelis Jan Delst

Michael Ray Nofi

Vladimir P Raksha

Charles Andrew Hulse

Robert E Klinger

Karen Denise Hendrix

Kim Leong Tan

C Andrew Hulse

Vladmir P Raksha

The disclosure relates to an optical security feature that is based on a single axis alignment of mirrors or facets in a structured surface that forms a micro mirror array. In an aspect, a device is described that includes a reflecting structure on a first layer, where the reflecting structure has a top surface with multiple embossed facets arranged in a spatial orientation that produces a flat ring optical effect upon incidence of light. In another aspect, a method for making the device is described that provides a reflecting layer and produces the reflecting structure on the reflecting layer with multiple facets arranged in the spatial orientation to produce the flat ring optical effect. In yet another aspect, an apparatus for making the device is described that includes a pressing device and a stamping device to transfer a pattern of the reflecting structure to a reflecting material.

Security feature based on a single axis alignment of mirrors in a structured surface that forms a micro mirror array

An oblique angle deposition is used to provide an A-plate optical retarder having at least one dense, form-birefringent layer. According to one embodiment, the dense, form-birefringent layer(s) are deposited as part of an FBAR stack to provide an all-dielectric full-function A/&#x2212;C-plate trim retarder for LCD birefringence compensation. Advantageously, the dense structure of the full-function A/&#x2212;C-plate trim retarder offers high durability and/or stability, thus making it well suited for providing polarization compensation in high light flux polarization-based projection systems.

Thin-film optical retarders

The invention provides a substantially athermal etalon. In one embodiment, the multi-cavity etalon includes at least one free-standing multi-layer thin film and is rendered thermally stable through the use of the free-standing multi-layer film and spacers having predetermined thermal expansion coefficients. In another embodiment, the multi-cavity etalon is rendered thermally stable through the use of mixed spacers.

Etalon devices employing multiple materials

An optical coupler device is provided with gradient index first and second lenses, with each lens having an outer endface with one or more ports at a predetermined location defined by a waveguide such as an optical fiber. A narrow bandpass optical filter is disposed between inner endfaces of the first and second lenses. In one embodiment, the second lens is in coaxial mechanical alignment with the first lens so as to have a common optical axis. An input waveguide and an optional reflection waveguide are disposed on the outer endface of the first lens on opposite sides of the optical axis. A transmission waveguide is disposed on one side of the outer endface of the second lens and is positioned at a non-zero angle with respect to the optical axis in order to compensate for a previously unrecognized lateral beam displacement caused by the optical filter. In other embodiments, the input waveguide and optional reflection waveguide are angled, or the optical axis of the second lens is laterally offset from the optical axis of the first lens, to compensate for the lateral beam displacement and thereby improve coupling efficiency.

Optical coupler device for dense wavelength division multiplexing

Growing community of inventors

Santa Rosa, CA, United States of America

Robert B Sargent