Matches 351 - 400 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
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6307679 Formation of a refractive index grating  
An apodised refractive index grating is recorded in a photosensitive optical fiber by forming first and second component interference patterns with different pitches, that are recorded in the...
6301062 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Lens optical system  
A lens optical system is provided with a cemented lens element formed by cementing two constituent lens elements made of different optical materials together, with a diffractive optical surface...
6292297 Multilevel diffractive optical element  
A multilevel diffractive optical element comprising a base and a plurality of phase zones having phase levels of a substantially identical height h, each phase zone being defined by a local...
6285503 Holographic diffuser  
Method for the preparation of holographic diffusers where the holographic diffuser is designed through iterative calculations according to the Fraunhofer theory of diffraction and some constrain...
6278552 Polarization separation device and projection-type display apparatus  
A polarization separation device has a grating having a recurring blaze-shaped grating pattern formed on one surface of a transparent base plate and an optically anisotropic material layer arranged...
6271967 Optically diffractive structure  
The invention concerns a structure arrangement that includes surface regions having one or more structures having an optical-diffraction effect, in particular for visually identifiable, optical...
6266192 Projection exposure apparatus and device manufacturing method  
A projection exposure apparatus includes an illumination optical system for illuminating a mask with light from a light source and a projection optical system having at least one diffractive...
6266191 Diffractive-refractive achromatic lens  
A diffractive-refractive achromatic lens includes a refractive lens system exhibiting longitudinal chromatic aberration that is substantially proportional to wavelength such that the back focus of...
6262845 Apparatus and method for generating partially coherent illumination for photolithography  
The present invention introduces a novel scatter plate into the optical path of source light used for illuminating a replicated object. The scatter plate has been designed to interrupt a focused,...
6262844 Optical systems employing stepped diffractive surfaces  
Stepped diffractive surfaces (13) are used to reduce variations in the optical properties of an optical system as a result of a change in the temperature of all or a portion of the system. Such...
6259561 Optical system for diffusing light  
An improved optical system is provided for diffusing light uniformly over a wide angle, including, a diffractive element for diffracting light received by the system in multiple diffraction orders,...
6248487 Extensions and improvements of method of producing an optical wave with a predetermined function  
Spatial light modulators (SLMs) can be amplitude-only modulated, phase-only modulated, or the pixel amplitudes can even be a function of phase. However, practical devices providing independently...
6246522 Optical system comprising a diffractive optical element, and method of designing the same  
The invention relates to a method of easily and quantitatively determining the diffraction efficiency of a relief type diffraction optical element, and provides a method of designing an optical...
6243202 Structure arrangement, in particular for a security element  
A structural arrangement having optical diffraction qualities for use as a security element in a value bearing document, such structural arrangement having a plurality of surface regions having at...
6239909 Image-forming method and image-forming apparatus  
A microscopy and apparatus capable of obtaining superresolution, and a fringe projection light-cut microscopy and apparatus capable of obtaining a natural light-cut image and enabling real-time...
6236509 Diffractive optical system with synthetic opening and laser cutting device incorporating this system  
An optical device for focusing a light beam. The device includes a Fourier diffractive element that can separate an incident beam into n beams along n directions which are symmetric about an...
6233096 Pseudo-spherical stepped diffractor constructed under constant step width conditions (multi-stepped monochromator)  
A diffractor for electromagnetic radiation with a spherical stepped geometry constructed under the constant step width conditions (here defined as pseudo-spherical geometry). The diffractor...
6232044 Infrared chopper using binary diffractive optics  
A chopper and method of making same, the chopper being fabricated by initially generating a photomask in conjunction with software. The software provides the lens design to be finally stamped onto...
6222864 High brightness laser diode source  
Coherent light sources combining a semiconductor optical source with a light diverging region, such as a flared resonator type laser diode or flared amplifier type MOPA, with a single lens adapted...
6218194 Analytical methods and apparatus employing an optical sensor device with refractive index modulation  
A method for monitoring the interaction of molecular species utilizes a sensor device comprising a substrate (1) with a waveguide (2) formed on the surface thereof. A grating (3) is formed in one...
6204304 Vinyl ether-based optical fiber coatings  
The specification describes optical fiber coating materials and methods for making optical fiber gratings wherein the material of the optical fiber coatings comprises vinyl ether functionalized...
6198568 Use of Chirped Quasi-phase-matched materials in chirped pulse amplification systems  
The limitations on maximum pulse energies from a fiber-grating pulse compressor are circumvented by placing a chirped-period quasi-phase-matched (QPM) crystal after the fiber-grating pulse...
6191890 Optical system with a dielectric subwavelength structure having high reflectivity and polarization selectivity  
The present invention is related to a system for transferring a beam of electromagnetic radiation having a vacuum wavelength. The system according to the invention includes a first dielectric...
6183918 Alignment method and system for use in manufacturing an optical filter  
A photosensitive optical fiber being scanned by an ultraviolet beam to form an optical filter is aligned with the beam by detecting fluorescence produced in the fiber. The relative position of the...
6178028 Multibeam scanning exposure device  
A multibeam scanning exposure device includes a light source for emitting a light beam, a multiple beam splitting element that is provided with a diffractive grating for dividing the light beam...
6166854 Diffraction type filter having an aberration correction function and wave length selectivity  
A zone plate having an aberration correcting function in a wavelength selecting manner and a diffraction grating substantially having a light shielding function in a wavelength selecting manner are...
6166833 Zero-order computer generated phase-only holograms  
A method for encoding zero-order phase-only holograms, and the holograms so encoded. The amplitude and phase of each point of a discrete mathematical transform, such as a Fourier transform, of an...
6160935 Method for creating a fiber optic section having spatial grating strength perturbations  
A method for creating nonuniform grating strengths within fiber optic includes exposing photosensitive fiber optic material to an optical source for various periods of time through a mask. As the...
6160667 Apparatus and method for creating and displaying planar virtual images  
A method and system for creating very thin displays producing virtual images based on extremely small "pinpoint" light sources. In an embodiment, a pinpoint light source is used in a manner...
6157494 Zoom lens system using a diffractive optical element and image pickup device using the same  
The invention provides a high-performance zoom lens system which is well corrected for chromatic aberrations by use of a DOE, makes the angle of incidence of a ray bundle on a diffractive surface...
6157488 Diffractive optical element  
A diffractive optical element including a stack of first, second and third optical regions or a stack of first, second, third and fourth optical regions, a first relief pattern formed between the...
6147815 Imaging optical system  
An imaging optical system (10) having a focal length (f) and a maximum imagewise numerical aperture. The system combines diffractive and refractive optical elements such that aberrations, including...
6144502 Viewfinder optical system and optical apparatus having the same  
A viewfinder optical system includes an image inverting optical unit for inverting an image formed by an objective optical unit, the image inverting optical unit inverting the image by using a...
6130782 Beam splitting element including a corrugated-surface-diffraction-grading  
A beam splitting element includes a transparent substrate and a diffractive grating formed on the substrate for dividing an incident beam into a plurality of diffracted beams. The diffractive...
6122104 Diffractive optical element and optical system having the same  
In a diffractive optical element, which is formed by laminating at least three layers of diffraction gratings made of at least three kinds of materials which differ in dispersion, at least three...
6122081 Using the Talbot Effect for lensless imaging of periodic structures in a holographic memory system  
A holographic memory system which utilizes the Talbot Effect for the lensless, near-field propagation of repeating image planes of periodic structures. Periodic phase structures at one plane in a...
6118586 Optical head device including an optically anisotropic diffraction grating and production method thereof  
An object is to provide an optical head device whereby the light utilization efficiency can be increased and which can be produced at a low cost. A glass substrate 1 having projections and recesses...
6118559 Broadband diffractive diffuser and associated methods  
A broadband diffractive diffuser contains at least three levels, with approximately a phase shift of π between at least two of the at least three levels. Such a diffuser provides light with more...
6101044 Zoom lens system  
A zoom lens system has, from the object side, a first lens unit having a negative optical power and including at least one diffractive optical surface and a second lens unit having a positive...
6099146 Illuminating optical system for cutting infrared light by relief type optical element  
An illumination optical system for cutting infrared light by a relief type optical element includes a light source and a relief type diffraction optical element having a rectangular...
6094308 Diffraction type filter having a wavelength selectivity  
A diffraction grating having a wavelength selectivity is disposed at a peripheral region of a filter, and only a wavelength of light whose luminous flux diameter is to be narrowed is diffracted...
6094307 Optical grating and encoder  
An encoder has the capability of outputting a stable displacement signal with small distortion. The encoder includes a first scale and a second scale. The first or second scale has a scale pattern...
6088161 Diffractive device having a surface relief structure which generates two or more diffraction images and includes a series of tracks  
A diffractive device has a surface relief structure which when illuminated by a light source, generates one or more diffraction effects which are observable from a range of viewing angles around...
6086208 Light valve projector apparatus and technique  
A method is disclosed for displaying images represented by electronic image information, including the following steps: providing a light source; optically modulating light from the light source,...
6084710 Diffraction type filter having a wave length selectivity  
A diffraction grating with a wavelength selectivity having one sectional side formed like a step is disposed at a marginal region of a filter, and only a wavelength of light whose luminous flux...
6072631 Diffractive homogenizer with compensation for spatial coherence  
A diffractive homogenizer is provided for receiving a beam of laser energy and producing a desired illumination pattern in a target plane. The homogenizer is made up of a plurality of diffractive...
6067197 Difraction grating having enhanced blaze performance at two wavelengths  
An echelle grating having a groove facet angle and groove periodicity such that for laser-emitted light of two different wavelengths the highest propagating diffraction order is blazed and the next...
6067106 Scanning optical apparatus  
A scanning optical apparatus includes a light source, deflector for deflecting a light beam emitted from the light source, and optical device for directing the light beam emitted from the light...
6064500 Holographic optical device and method of manufacture  
A method of producing an optical element including a photopolymer layer between two holograms is disclosed. The holograms have the same diffraction spacing and refractive index, but the first...
6057958 Pixel based gobo record control format  
A special record format used for commanding light pattern shapes and addressable light pattern shape generator. The command format includes a first part which commands a specified gobo and second...
Matches 351 - 400 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >