Matches 451 - 500 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
5768454 Method of and system for writing a bragg grating point by point by point in an optical fiber  
A system for writing a Bragg grating point-by-point in an optical waveguide includes an illumination system for producing a primary beam. It further includes a diffraction grating to receive the...
5760960 Cascaded self-induced holography  
Cascaded diffraction grated pairs are employed to form submicron gratings and other patterns in various types of devices using photolithographic, UV exposure and other techniques. Cascaded grating...
5760871 Diffractive multi-focal lens  
A tri-focal diffractive lens defining three foci, for viewing a band of light having a representative wavelength of λ, including a diffractive surface having a number of optical heights, h o ,...
5757523 Optical radiation devices  
A device, particularly an antenna device, for emitting a beam of optical radiation to irradiate a remote target area includes an optical source having a limited wavelength band, and a hologram...
5754342 Video device utilizing a two-dimensional diffraction grating  
A two-dimensional diffraction grating (5, 14) has a plurality of grating elements arranged in two directions (X, Y) different from each other. The grating elements in one of the directions (X, Y)...
5754341 Phase grating, its fabricating method, optical encoder, motor using the optical encoder, and robot using the motor  
A phase grating has a concave part of rectangular shape type substantially, of which grating depth is deeper in a specific range than depth d' calculated in a formula │n-n 0 ...
5748814 Method for spatially controlling the period and amplitude of Bragg filters  
A method for spatially controlling the period and amplitude of Bragg filters in an optical medium having a longitudinal axis that is sensitive to at least some wavelength of electromagnetic...
5745289 Athermalized diffractive optical elements  
A diffractive optical element, ("DOE"), and particularly a diffractive lens having annular zones about an optical axis and known as a Fresnel zone plate or kinoform lens, is athermalized so that...
5745221 Exposure equipment  
An exposure equipment which is simply configured and can expose fine cyclic patterns whose pitch is smaller than the wavelength of light source has the laser beam 2 (wavelength λ) outgoing from...
5737042 Image display device with optical low-pass filter  
An image display device is so adapted as to eliminate both largest and next largest noise components. The image display device includes an image display body having a plurality of pixels arranged...
5734502 Achromatic diffractive optic  
Diffractive optical elements (DOEs) consisting of a sandwich of two materials are described with an interfacial surface whose relief height impresses the desired optical phase. The two materials...
5730888 Bragg gratings in waveguides  
A phase grating mask is placed in-contact or near contact with an optical waveguide to make a blazed grating in the waveguide. A band of grating elements are defined across a surface of the mask...
5712730 Diffractive optical device for the optical imaging of a spatial point onto other spatial points  
A diffractive optical apparatus has a planarly expansive, diffracting structure with a plurality of structural sub-regions, each of this sub-regions directing a portion of a light falling thereon...
5712715 Optical transmission system with spatially-varying Bragg reflector  
An optical transmission system having a transmission waveguide, an optical amplifier, a pump radiation source for supplying pump radiation to the optical amplifier, and a Bragg grating for...
5712622 Intrusion detector  
An infrared detector including a sensor which provides an output signal responsive to infrared radiation incident on a face thereof, and a diffractive optical element which directs a substantial...
5710667 Focus detecting optical system  
A focus detecting optical system for detecting a focus condition of an image of an object to be picked-up by an image forming lens including a condenser lens arranged in a vicinity of a...
5708739 Method and apparatus for photobleaching patterns in irradiated optical waveguides  
A method and apparatus for photobleaching predetermined patterns in an opal waveguide. The apparatus irradiates the optical waveguide generally held in a fixture. The irradiation includes a...
5699186 Multi-fold optical magnifier for use in image manifestation apparatus  
A multi-fold optical magnifier includes a prism with four reflecting surfaces positioned to direct light from an inlet to an outlet, and a lens positioned adjacent the prism outlet to receive light...
5699185 Use of fresnel zone plates for material processing  
The apparatus for machining and material processing includes an excimer laser and a Fresnel zone plate array (FZP) positioned parallel to the workpiece, with the distance between the FZP and the...
5696584 Phase grating having an unprotected relief structure with a grating structure that causes destructive interference of reflections  
An uncovered unprotected phase grating includes a substrate which has a relief structure. The relief structure includes a high-refraction material so that even if soiled with impeding ambient media...
5694247 Optical transmissive component with anti-reflection gratings  
An optical transmissive component (1) is described, which component has an entrance surface (4) and an exit surface (5) for optical radiation (20), in which one of the surfaces (4; 5) is provided...
5687264 Apparatus for injecting high power laser light into a fiber optic cable  
High intensity laser light is evenly injected into an optical fiber by the combination of a converging lens and a multisegment kinoform (binary optical element). The segments preferably have...
5682265 Diffractive microstructures for color separation and fusing  
Optical apparatus for dispersing a visible light spectrum into primary color bands and directing each color band into a specific pixelated cell of a passive display. The apparatus includes an array...
5680252 Miniature hybrid optical imaging lens  
A miniature lens system that corrects for imaging and chromatic aberrations, the lens system being fabricated from primarily commercially-available components. A first element at the input to a...
5671308 Optical waveguide having diffraction grating area and method of fabricating the same  
The present invention is to provide a method for identifying an optical line easily and accurately regardless of the optical line length. A plurality of reflecting parts is placed on the optical...
5666224 Optical grating and method of fabricating an optical grating  
An optical grating includes a sequence of grating lines, the sequence being such that each grating line is centered on a position which is an integer multiple of a line spacing distance from a...
5666221 Binary optic imaging system  
An imaging system (10) contains a diffractive optic lens (14) which allows for a relatively accurate representation of objects within a field of view. These objects are associated with light rays...
5661601 Projection method and projection system and mask therefor  
A projection method uses a modified illumination method for a lithography process of semiconductor device, and a projection system and mask use the projection method. An object is exposed by...
5652818 Bragg gratings in waveguides and method of making same  
A method of generating a Bragg reflective grating in a photosensitive optical waveguide using a fringe pattern of electromagnetic radiation involves positioning a mask in the path of the radiation,...
5652426 Optical encoder having high resolution  
An optical encoder is provided which is not affected by fluctuation of wavelength of a light beam due to temperature change, without sacrificing resolution of measurement. The optical encoder...
5646715 Illuminating arrangement for an optical system having a reticle masking unit  
The invention is directed to an illuminating arrangement for an optical system such as a microlithographic projection exposure apparatus and includes a glass rod 5 for light integration. The...
5644430 Single fold optical magnifier for use in image manifestation apparatus  
A single fold optical magnifier including a plurality of optical elements having an aspheric field flattening light inlet with a light outlet directed at an angle to the inlet and a reflecting...
5644413 Optical head for adjusting a positional relation between the information medium and the optical head  
An optical head apparatus consists of a semiconductor laser for radiating a light beam, a first collimator lens for collimating the light beam, a wedge-like prism for reshaping the light beam, a...
5638212 Method of manufacturing a diffractive surface profile  
A method of manufacturing a diffractive surface comprising: rotating a surface to be cut at a rate W>1,500 RPM; translating a cutting tip at low speed V where V<1.2 mm/minute; and cutting the...
5633966 Method of forming refractive index distribution in light transmission path, and optical filter and method of using the same  
A method of forming a refractive index distribution in a light transmission path including a core and a cladding layer involves steps of applying a photosensitive material layer to the surface of...
5631762 Multi-beam generating element and optical printing apparatus therewith  
A multi-beam generating element generates an even number of multiple beams having a uniform light intensity. The multi-beam generating element has a grating constructed by repeatedly arranging...
5631721 Hybrid illumination system for use in photolithography  
An illumination system for use in photolithography having an array optical element near the formation of a desired illumination field. Light or electromagnetic radiation from an illumination source...
5625499 Achromatic and apochromatic prism element employing prisms and gratings  
An apochromatic grism (42) includes a first prism (48) with a second prism (50) disposed adjacent to it. A grating (44) is adjacent to the front surface of the first prism (48) and the Abbe number...
5625472 Method for forming distributed Bragg reflectors in optical media  
A device for transmitting radiation is provided. The device includes a glass optical waveguide having a core. A Bragg grating is at least partially formed within the core. Associated with the Bragg...
5623365 Diffractive optical element for use within a projection lens system  
A projection lens system with a high resolving power and a wide exposure area which is effectively corrected for various aberrations including chromatic aberration and which is compact and has...
5617248 Diffraction grating array and display having a diffraction grating  
A display having a diffraction grating comprises a substrate, a plurality of diffraction grating cells formed over a surface of the substrate and comprising a diffraction grating having curve...
5617227 Light diffraction device using reconfigurable spatial light modulators and the fractional talbot effect  
Light diffraction device using reconfigurable spatial light modulators and the fractional Talbot effect. This device comprises two liquid crystal, electrically addressable spatial light modulators...
5613022 Diffractive display and method utilizing reflective or transmissive light yielding single pixel full color capability  
The present invention is directed to a diffractive display suitable for presenting graphic and the like displays. Broadly, the novel display is realized from a diffraction pattern (132) carried by...
5606434 Achromatic optical system including diffractive optical element  
An aromatic optical system that preferably includes a light source for emitting light therefrom, an achromatic optical element positioned to receive light emitted from the light source, and an...
5604829 Optical waveguide with diffraction grating and method of forming the same  
A method for forming an index grating in an optical waveguide, such as an optical fiber, with precise control over the grating's period, cross-sectional shape and length. A single writing beam is...
5600486 Color separation microlens  
A color separation microlens is fabricated to be a single micro-optical element made up of a color separation grating integrated with a refractive lens. The color separation microlens separates the...
5589982 Polychromatic diffractive lens  
A polychromatic diffractive lens is usable with broadband or multi-spectral illumination to bring a plurality of spectral components of the illumination to a common focus in space. The lens has a...
5587815 Phase modulation holographic device for generating two different wavefronts  
A phase modulating device for spatially modulating a phase of an incident light beam is of a binary type having a plurality of rectangular protrusions on a cross section thereof. A distribution is...
5586096 Optical write/read device and an information recording media  
The present invention comprises an optical write/read device including a light emitting/receiving portion having light emitting elements and light receiving elements which are arranged in parallel...
5581405 Hybrid refractive/diffractive achromatic camera lens and camera using such  
A hybrid refractive and diffractive achromatic lens suited for single-use or inexpensive single-lens cameras operating in visible spectral range. The lens comprises a body of optically transmissive...
Matches 451 - 500 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >