|
Match
|
Document |
Document Title |
|
|
US20090251749 |
OVD CONTAINING DEVICE
A holographic overlay is provided, including: a polycarbonate substrate having a first side and a second side, a diffractive structure cast upon the first side of the polycarbonate substrate, and a...
|
|
|
US20090244519 |
Security Device
A security device comprises a substrate having a transparent region ( 1 ). At least one optical element ( 2, 3 ) is provided in part of the transparent region, the optical element causing an...
|
|
|
US20090225424 |
MICRO-OPTICAL DIFFRACTION GRID AND PROCESS FOR PRODUCING THE SAME
The invention relates to microoptical diffraction gratings for electromagnetic radiation and to a method suitable for the manufacture thereof. The diffraction gratings in accordance with the...
|
|
|
US20090122278 |
NON-SPECULAR FOLDING MIRROR AND A SYSTEM OF USING THE SAME
A non-specular reflective optical element comprises a reflective surface. A beam of incident light can be reflected such that the reflective angle may or may not be the same as the incident angle....
|
|
|
US20090116092 |
Method and apparatus for correcting output light-amounts of spatial light modulator, image recording apparatus, and image recording method
In each light modulator element of a special light modulator with diffraction grating structure where moving ribbons and fixed ribbons are alternately arranged, the maximum light-amount (I 1 ) when...
|
|
|
US20090059375 |
Grating Device with Adjusting Layer
A reflection grating device with a continuous non-reflecting dielectric adjusting layer disposed between a grating structure and one or more continuous reflecting layers is disclosed that operates...
|
|
|
US20090034080 |
OPTICAL SYSTEM
The invention concerns an optical system. The optical system comprises an input for receiving an optical signal, a predetermined output plane, and a diffraction grating for separating the optical...
|
|
|
US20090034077 |
Grating with angled output prism face for providing wavelength-dependent group delay
A method and apparatus for dispersion compensation which provides a specified, well-controlled, wavelength-dependent optical path length in a laser or other optical system. A reflection grism-like...
|
|
|
US20080266663 |
Optical pulse-width modifier structure
An optical pulse-width modifier structure includes a first diffraction grating and an optically unpowered reversing mirror. An optical path extends between the first diffraction grating and the...
|
|
|
US20080259457 |
OPTICAL ELEMENT, MASTER PROTOTYPE, RESIN MASTER, RESIN MOLDED ARTICLE AND METAL MOLD
For generation of optical elements, a master prototype, a resin master, a resin molded article or a metal mold is used. In the master prototype, the resin master, the resin molded article or the...
|
|
|
US20080259984 |
STRUCTURE HAVING PHOTONIC CRYSTAL LAYER AND SURFACE EMITTING LASER INCLUDING THE SAME
A structure has a photonic crystal layer comprising a first member made of a material having a first refractive index; and a second member made of a material having a second refractive index,...
|
|
|
US20080240175 |
Bragg Grating Reflection Strength Control
A tunable laser comprises a gain section and two or more reflectors. At least one of the reflectors is a Bragg grating comprising a reduced strength section comprising a base order periodic pattern...
|
|
|
US20080218857 |
Surface Relief Grating Image Machining Process and Product
A product with a surface relief grating (SRG) image effect has a surface with rotational cuts effected therein to create the SRG image effect. The SRG image has an effect based on a rotational...
|
|
|
US20080062523 |
Optical diffraction grating and method of manufacture
An optical device includes a substrate, a reflecting stack and optionally, a cap layer. The reflecting stack has a first plurality of optical thin film layers and a second plurality of optical thin...
|
|
|
US20080007832 |
Wavelength Filter
A wavelength filter, which has a simple structure with a small number of types of thin films and a small number of laminations, is produced by a simple process, has few variations of performance...
|