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7417796 Wavelength discrimination filter for infrared wavelengths  
An optical comb filter has polarizers placed before and after two or more birefringent elements, each having a fixed retarder and an aligned tunable liquid crystal. The birefringent elements are...
7414785 Ultraviolet polarization beam splitter with minimum apodization  
A beamsplitter includes a first fluoride prism and a second fluoride prism. A coating interface is between the first and second fluoride prisms, wherein an overall R(s)*T(p) function of the...
7381339 Increased yield of cubic crystalline optical elements by crystal orientation  
Increased yield of optical elements from cubic crystal rods, such as made of calcium fluoride, is made possible by orienting the optical elements for supporting the propagation of light along one...
7335874 Method and apparatus for generating a circularly polarized illumination beam  
A method and apparatus for illuminating a subject with deep UV light and detecting 2-dimensional image information, e.g., a transmission image, fluorescence image, reflected light image, etc. The...
7333270 Dual band night vision device  
A night vision device provides both an amplified visible light image and an infrared image, overlayed upon each other so that they appear to be a single image. A user may select to utilize either...
7321465 Method of optimizing an objective with fluoride crystal lenses, and objective with fluoride crystal lenses  
A numerical optimizing method serves to reduce harmful effects caused by intrinsic birefringence in lenses of a fluoride crystal material of cubic crystal structure in an objective, particularly a...
7304719 Patterned grid element polarizer  
The invention relates to a patterned grid polarizer for use in lithography, comprising a substrate that is transparent to ultraviolet (UV) light; and an array of elements patterned on the...
7297393 Optical film  
Birefringent optical films have a Brewster angle (the angle at which reflectance of p-polarized light goes to zero) which is very large or is nonexistent. This allows for the construction of...
7221501 Stationary and dynamic radial transverse electric polarizer for high numerical aperture systems  
A radial transverse electric polarizer device is provided. The device includes a first layer of material having a first refractive index, a second layer of material having a second refractive...
7206059 Stationary and dynamic radial transverse electric polarizer for high numerical aperture systems  
A radial transverse electric polarizer device includes a substrate material having a first refractive index and a plurality of elongated azimuthally oriented elements coupled to the substrate...
7170680 Privacy screen for a display  
A privacy screen for a vertically polarized display (e.g., a LCD) that comprises a rotating film, a polarizing film and a birefringent film is described. The privacy screen transmits substantial...
7158299 Projection screen and projection system comprising the same  
A projection screen includes a cholesteric liquid crystalline, polarized-light selective reflection layer for selectively diffuse-reflecting a specific polarized-light component. The layer has, on...
7141297 Multilayer optical bodies  
Optical bodies, comprising: a plurality of first optical layers comprising a first polymer composition that comprises (i) a polyester portion having terephthalate comonomer units and ethylene...
7130123 Polarization conversion element and optical system containing such polarization conversion element  
A polarization conversion element with four phase plates laminated on a substrate plate, in the order of first, second, third and fourth phase plates from a light incident side. The first and...
7130023 Lithographic apparatus, mirror element, device manufacturing method, and beam delivery system  
A lithographic projection apparatus includes a radiation system for providing a projection beam of radiation, a support structure for supporting a patterning device, the patterning device serving...
7119951 Polarizer for high-power deep UV radiation  
A polarizing effect is achieved for light having wavelengths less than 250 nm by orienting an antireflector at an incidence angle between 65° and 75°. Despite limited choices for materials, the...
7083847 Optical film  
Birefringent optical films have a Brewster angle (the angle at which reflectance of p-polarized light goes to zero) which is very large or is nonexistent. This allows for the construction of...
7075721 Compensator for radially symmetric birefringence  
A birefringence correction is incorporated into an optical imaging system for imaging with deep ultraviolet light. Optical elements which exhibit an intrinsic birefringence with deep ultraviolet...
7075720 Structures and methods for reducing polarization aberration in optical systems  
An optical system includes multiple cubic crystalline optical elements and one or more uniaxial birefringent elements in which the crystal lattices of the cubic crystalline optical elements are...
7075719 Optical filter and optical device provided with this optical filter  
Light emitted from a taking lens 20 enters a first birefringent plate 1 a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to...
7072102 Methods for reducing polarization aberration in optical systems  
An optical system includes multiple cubic crystalline optical elements and one or more uniaxial birefringent elements in which the crystal lattices of the cubic crystalline optical elements are...
7061671 Method for evaluating image formation performance  
The present invention accomplishes an evaluation of image formation performance in which the influence of a coat is accurately reflected. According to the present invention, for the evaluation of...
7057813 Projection screen and projection system comprising the same  
The present invention provides a projection screen capable of sharply displaying an image even under bright environmental light, of improving brightness distribution and viewing angle, and of...
7050233 Precision phase retardation devices and method of making same  
A birefringent device of substantially uniform thickness less than about 10 microns, and being suitable for operating in a wavelength range about a central wavelength is disclosed. The device...
7031053 Dichroic polarizer and material  
The invention pertains to thermo-resistant and light-resistant dichroic polarizers based on thin films of dichroic matters, in particular organic dyestuffs, in which molecules are ordered in a...
6980358 Turning prism for ultraviolet radiation  
A truncated triangular prism has an entrance and an exit face perpendicular to each other and a reflecting face inclined at an angle α to the entrance face where α is about 135°−θ B , and...
6967776 Polarizing filter and optical device using the same  
A polarizing filter has a laminate structure: wherein one to four layers of first dielectric thin films 1 and one to four layers of second dielectric thin films 2 are alternately laminated on a...
6963432 Fabrication of true apodized fiber Bragg grating using a new two-beam interferometer with polarization control  
The present invention provides a two-beam interference exposure system that can be simply adjusted by rotating only one mirror. By placing a half-wave plate in one of the interference arms and...
6946416 Fused silica having improved index homogeneity  
Fused silica articles exhibiting improved internal transmission and decreased absorption change when irradiated with a laser when compared with fused silica articles containing lower levels of...
6943941 Stationary and dynamic radial transverse electric polarizer for high numerical aperture systems  
A radial transverse electric polarizer device is provided. The device includes a first layer of material having a first refractive index, a second layer of material having a second refractive...
6897434 All-fiber photon-pair source for quantum communications  
A source and/or method of generating quantum-correlated and/or entangled photon pairs using parametric fluorescence in a fiber Sagnac loop. The photon pairs are generated in the 1550 nm fiber-optic...
6887531 Glare protection device  
The glare protection device for welding applications contains an active electro-optical filter element ( 2 ) with an electronic control circuit ( 3 ). The active filter element ( 2 ) absorbs the...
6882475 Polarizing member, illuminator and liquid-crystal display device  
There is provided a polarizing member having a sheet-like member formed so that linearly polarized light can be obtained as transmitted light through the sheet-like member after natural light is...
6879379 Projection lens and microlithographic projection exposure apparatus  
A projection exposure apparatus for microlithography has a light source, an illumination system, a mask-positioning system and a projection lens. The latter has a system aperture plane and an image...
6870668 Method for evaluating image formation performance  
The present invention accomplishes an evaluation of image formation performance in which the influence of a coat is accurately reflected. According to the present invention, for the evaluation of...
6844972 Reducing aberration in optical systems comprising cubic crystalline optical elements  
An optical system includes multiple cubic crystalline optical elements and one or more polarization rotators in which the crystal lattices of the cubic crystalline optical elements are oriented...
6833917 Compact birefringent spectrometer with electrically adjustable passband  
An electrically adjustable spectrometer uses collimated, P-polarized light made incident on a surface of an optically transparent liquid crystal input material. The material transmits the light to...
6785050 Corrosion resistant wire-grid polarizer and method of fabrication  
A polarizing device, such as a wire-grid polarizer, includes a substantial mono-layer of a corrosion inhibitor without adversely affecting the optical properties of the polarizing device. The...
6775063 Optical system and exposure apparatus having the optical system  
An optical system assures excellent optical performance with substantially no effect of birefringence, even when a birefringent crystal material such as fluorite is used. An optical system includes...
6667095 Multicomponent optical body  
Multilayer polymeric films and other optical bodies are provided. The films, which have at least three layers of different composition in the optical repeating unit, reflect light in a first...
6650474 Optical filter and optical device provided with this optical filter  
Light emitted from a taking lens 20 enters a first birefringent plate 1 a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to...
6649326 Photolithographic method and UV transmitting fluoride crystals with minimized spatial dispersion  
The invention provides a UV below 200 nm lithography method. The invention includes providing a below 200 nm radiation source for producing <200-nm light, providing a plurality of mixed cubic...
6639720 Large scale polarizer and polarizer system employing it  
A large scale polarizer comprises one or more quartz substrate parts formed as a rectangle, a triangle, or a parallelogram, and a polarizer holder supporting the quartz substrate part. The...
6636349 Reflection and refraction optical system and projection exposure apparatus using the same  
An imaging optical system includes a polarization beam splitter, a quarter waveplate, a reflection mirror and polarization state changing unit. The beam from an object plane is projected by way of...
6618142 Compact birefringent spectrometer  
A spectrometer uses collimated, P-polarized light made incident on a surface of an optically transparent material at angle θ INC . The material transmits the light which reaches a boundary surface...
6613421 Optical film  
Birefringent optical films have a Brewster angle (the angle at which reflectance of p-polarized light goes to zero) which is very large or is nonexistent. This allows for the construction of...
6597498 Optical system for the vacuum ultraviolet  
The invention is directed to an optical system for the vacuum ultraviolet range wherein the optical system utilizes the isotropic point at which the wavelength of the double refraction of a crystal...
6583931 Projection optical system, production method thereof, and projection exposure apparatus using it  
In a projection optical system having at least two silica glass optical members, a birefringence value is measured at each of points in a plane normal to the optical axis with the center at an...
6475682 Photolithography method, photolithography mask blanks, and method of making  
The invention provides optical projection lithography methods, photolithography photomasks, and optical photolithography mask blanks for use in optical photolithography systems utilizing deep...
6424454 Brewster-cut crystal for nonlinear frequency conversion  
A specially cut uncoated birefringent crystal having three Brewster-cut faces with adjacent coated Brewster-cut coupling prisms are used for optical frequency conversion. Two input frequencies are...
Matches 1 - 50 out of 142 1 2 3 >