Matches 151 - 200 out of 217 < 1 2 3 4 5 >
Match Document Document Title
5386319 High resolution imagery systems and methods  
The current limits of resolution of multi-element optical systems are exceeded by reducing the number of elements while introducing at the critical aperture a blazed transmission grating having...
5367588 Method of fabricating Bragg gratings using a silica glass phase grating mask and mask used by same  
An index grating is imprinted in the core of an optical fiber using a specially designed silica glass phase grating mask. The phase mask is held in close proximity to the optical fiber. Laser...
5351321 Bragg grating made in optical waveguide  
A Bragg grating is made in an optical path composed of material exhibiting change in index when exposed to radiation of an actuating frequency by passing radiation from a source of such actuating...
5237435 Multicolor projector employing diffraction grating type liquid crystal light modulators  
A projector capable of compactizing the structure and improving the efficiency of light utilization is disclosed. The projector has an illuminating system, a light modulation device and a...
5227625 Retro-reflective variable-pitch diffraction grating for use in a rotary actuator disk file  
A rotary actuator data recording disk file is provided with a retro-reflective diffraction grating for use in measuring the angular position of the rotary actuator arm. The diffraction grating has...
5204516 Planar optical scanning head having deficiency-correcting grating  
A planar optical head is described with a corrected input grating for scanning a surface, for example, a recording surface (2) in an optical record carrier (1). A radiation source (5) supplies a...
5151814 Phased array for optical beam control  
An optical beam scanner incorporating an array of beam deflection elements commonly controlled to steer an optical beam impingent on the array is described. The beam steering elements are arranged...
5132843 Grating lens and focusing grating coupler  
A grating lens is disclosed in which diffraction efficiency varies in the focusing direction of light on a surface of the lens. Also disclosed is a focusing grating coupler in which the diffraction...
5131736 Solid colloidal optical wavelength filter  
A solid colloidal optical wavelength filter includes a suspension of spheal particles dispersed in a coagulable medium such as a setting plastic. The filter is formed by suspending spherical...
5121239 Filter having adjustable spectral transmittance function  
An optical filter having a variable spectral transmittance function of selectable shape is described which includes a spectrum forming element for dispersing a light beam into a characteristic...
5115344 Tunable diffraction grating  
A diffraction grating can be tuned by varying the spacing of the rows of the diffraction grating. The diffraction grating is comprised of rows of an electrically conductive material disposed on a...
5058977 Broadband tunable in-line filter for fiber optics  
A broadband tunable in-fiber filter includes a grating with divergent ridges which can be translated transversely of a side-polished optical fiber to vary the periodicity at an exposed evanescent...
5056889 Optical device including a grating  
Substrate-supported optical device structures such as, e.g. quantum-well infrared detectors/detector arrays are provided with a grating for optical coupling. A binary, reflection grating is...
5054905 Progressive intensity phase bifocal  
An ophthalmic lens including a carrier lens having an anterior and a posterior surface. A zone plate is having a plurality of zones is disposed annularly about the optical axis of the carrier lens...
5054884 Beam splitter including a diffraction grating and one of step shaped, inclined, or curved transparent surface  
A beam splitter which includes a transparent layer, a diffraction grating layer and an introduction member for introducing incident light. The incident light is repeatedly totally reflected to the...
5020910 Monolithic diffraction spectrometer  
A monolithic diffraction spectrometer having a diffraction grating formed over a light sensing array is provided. The diffraction grating serves to diffract wavelengths of interest to an underlying...
5020879 Flexible replica grating  
A flexible replica grating having a metal layer of a wave-like shape, a synthetic resin layer for supporting the metal layer, and a flexible synthetic resin film for supporting the synthetic resin...
5011264 Wide linear dynamic range optical modulator  
An optical modulator for generating an amplitude modulated optical signal. A signal generator generates an optical signal that is optically coupled to a tunable filter which shares a common optical...
5004673 Method of manufacturing surface relief patterns of variable cross-sectional geometry  
A method of manufacturing surface relief patterns of variable depth in solid materials is disclosed, which patterns, when seen in cross-section, are of variable geometry. After determining the...
4986623 Broadband tunable in-line filter for fiber optics  
A broadband tunable in-fiber filter includes a grating with divergent ridges which can be translated transversely of a side-polished optical fiber to vary the periodicity at an exposed evanescent...
4968117 Graded index asperhic combiners and display system utilizing same  
An improved optical combiner useful in many applications is disclosed. The combiner includes a substrate with at least one aspheric surface and an diffraction-type reflective coating formed on the...
4940890 Optical scanning device, mirror objective suitable for use in said device and optical write and/or read apparatus provided with said device  
An optical scanning device which includes a radiation source, a mirror objective an a radiation-sensitive detection system, the mirror objective being a transparent body having a radiation window...
4936666 Diffractive lens  
A diffractive lens has a plurality of diffractive zones at least one of which has an optical step having an optical height equal to jλ and at least one of which has an optical step having an...
4936665 High resolution imagery systems and methods  
The current limits of resolution of multi-element optical systems are exceeded by reducing the number of elements while introducing at the critical aperture a blazed transmission grating having...
4934798 Lens deflection system  
A lens deflection system (10) for deflecting radiation emitted from a source. The lens deflection system (10) provides for the varying of the index of refraction of system (10) as a function of...
4927245 Frequency shifter for medium infrared range wave  
A frequency shifter to shift the frequency of a guided wave in the medium infrared range comprises: an optical guide, formed by semiconducting materials, on the surface of which a diffraction...
4895790 High-efficiency, multilevel, diffractive optical elements  
The method utilizes high resolution lithography, mask aligning, and reactive ion etching. In particular, at least two binary amplitude masks are generated. A photoresist layer on an optical element...
4875373 Temperature compensated fiber optic vibration sensor  
A light beam altering grid (20), having a graded slit density pattern (22), is mounted on a temperature responsive support structure (23) to traverse a light beam (28). The slit density (slit per...
4856869 Display element and observation apparatus having the same  
A display element includes a substrate and a display pattern formed on the substrate, the display pattern including a diffraction grating. The width in the direction perpendicular to the grating...
4802735 Light valve projector having an improved bar plate configuration  
A light valve projector of the Schlieren dark field type is provided with an improved input bar plate configuration which achieves greater light efficiencies. The improved input bar plate has...
4789221 Light valve projector apparatus having increased light efficiency  
A multiple light valve (MLV) projector apparatus for producing a color display includes two separate light valves of the Schlieren dark field type. One of the light valves produces a first primary...
4786124 Broad-spectrum achromatic phase shifters, phase modulators, frequency shifters, and frequency modulators  
Achromatic optical systems forming phase shifters and phase modulators are presented and shown to impart (temporal) phase-angle shifts in incoming waves which are independent of wavelength over...
4661983 Secure document identification technique  
A random-pattern of microscopic lines that inherently forms in a dielectric coating layer of a 3-layer diffractive subtractive filter authenticating device incorporated in a secure document permits...
4639091 Static deflector device for an infrared beam  
The diffraction grating principle is used to deflect an infrared beam in a series of discrete predetermined directions. A periodic control voltage having a staircase waveform with N steps is...
4632517 Crystalline colloidal narrow band radiation filter  
A narrow wavelength band filtering device is provided by forming a highly ordered crystalline colloidal structure within a cell. The crystalline colloidal structure is relatively thin and has...
4600270 Beam recombination via cylindrical mirror  
A beam recombiner is used to parallelize two first order beams emanating from an magneto-optic stripe domain light deflector. One arrangement uses a concave cylindrical mirror with a negative...
4583818 Optical device with surface plasmons  
An optical device used as an optical switch or bistable device, with surface plasmons, is comprised of a semiconductor base material forming a non-linear dielectric layer along with a metal layer,...
4474446 Focal sensor having optical low pass filter  
A system having a scaled anti-aliasing random phase filter for use in optical imaging systems having a sampled focal plane or an automatic focussing device. The filter is scaled so that it may be...
4453805 Optical grating using a liquid suspension of dielectric particles  
The invention provides apparatus comprising at least two beams of coherent radiation directed so as to intersect and form a standing wave pattern having a period Λ in an optically responsive...
4451412 Process for producing diffracting phase structures  
This invention concerns a process for producing diffracting phase structures in an interaction medium, which is formed of microballs of material in suspension in a polymerizable liquid. When...
4435041 Chromatic aberration correction in a multiwavelength light beam deflection system  
An apparatus for and a method of correcting chromatic aberration in a multiwavelength input light beam deflection system incorporating a magneto-optic diffraction grating is disclosed. The...
4398798 Image rotating diffraction grating  
Disclosed is an apparatus for and a method of establishing the domain walls within a stripe-domain supporting magnetizable film in a radially directed orientation, the separation of which is...
4314283 Diffraction based light collector  
A light collector is provided for collecting light reflected from an information-bearing surface. In one embodiment, used in a flying spot scanning system, a generally cylindrical rod is placed...
4270862 Magneto-optic light deflector system  
An apparatus for and a method of utilizing a magneto-optic stripe domain light deflector for both the transmitted and received light beam.
4243300 Large aperture phased element modulator/antenna  
An electro-optical modulator/antenna operates in the tunable diffraction ting mode to vary the magnitude of the zero diffraction order and consequently transmits optical information. A relatively...
4115747 Optical modulator using a controllable diffraction grating  
The combination of an electro-optic substrate the refractive index of which is changed by an electric field applied to the same and a pair of comb-shaped interdigital diffraction electrodes formed...
4103988 Electrically controlled optical switch  
The invention relates to switches which enable connections to be optically established between at least one incoming electrical circuit and one of several outgoing electrical circuits. It comprises...
3982810 Directional radiation by asymmetrical dielectric gratings  
There is disclosed a technique whereby a dielectric grating disposed on a in film that has a surface wave propagating thereon can concentrate the power from this wave into a beam that is either...
3980403 Variable grating mode imaging method  
A novel projection imaging method. An imaging member is utilized comprising between two electrodes a negative photoconductor in contact with an about 1 to about 6 micron thick layer of nematic...
3980396 Liquid crystalline deflection and modulation system  
Deflection and modulation of monochromatic light is achieved by providing an about 1 micron to about 6 micron thick layer of homogeneously aligned nematic liquid crystalline material having...
Matches 151 - 200 out of 217 < 1 2 3 4 5 >