Matches 201 - 250 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
6856392 Optical element with alignment mark, and optical system having such optical element  
A diffractive optical element having a design wavelength λ, includes a diffractive surface for diffracting predetermined light corresponding to the design wavelength, and a mark shaped so that,...
6844973 Plane diffraction grating based on surface normal rotation and its application to an optical system  
A plane diffraction grating based on surface normal rotation according to the present invention is designed so that the profile of the grooves at a radial area is determined depending on a...
6844417 Brominated polycarbonate films  
Optical articles, including light management films, prepared from brominated polycarbonate material are disclosed. The brominated polycarbonate provides a film exhibiting good light transmittance,...
6839174 Relief type diffraction optical element, optical system comprising the same and mold for manufacturing the same  
A relief type diffraction optical element including a substrate made of an optical material, said substrate having formed on its surface a non-even width relief pattern which include a first zone...
6839173 Reflection type diffraction grating  
A reflection type diffraction grating according to the present invention has a structure in which a metal film as a first layer with reflectance not lower than 30% with respect to the wavelength of...
6836365 DIFFRACTIVE OPTICAL ELEMENT, METHOD OF FABRICATING THE ELEMENT, ILLUMINATION DEVICE PROVIDED WITH THE ELEMENT, PROJECTION EXPOSURE APPARATUS, EXPOSURE METHOD, OPTICAL HOMOGENIZER, AND METHOD OF FABRICATING THE OPTICAL HOMOGENIZER  
A diffractive optical element efficiently converts an input light beam into an output light beam having a specified cross-sectional shape. The diffractive optical element includes a plurality of...
6831783 Diffractive optical element and optical system  
A diffractive optical element includes a first layer having a relief-type grating, a second layer having a relief-type grating, and a third layer having a relief-type grating. The first, second and...
6829417 Amplitude and phase control in distributed optical structures  
A distributed optical structure comprises a set of diffractive elements. Individual diffractive element transfer functions collectively yield an overall transfer function between entrance and exit...
6829099 Projection optical system and projection exposure apparatus  
A projection optical system includes at least one lens, at least one concave mirror, at least one diffractive optical element, a first imaging optical system that includes the at least one lens and...
6829091 Optical system and optical instrument with diffractive optical element  
An optical system for forming an image of an object. The optical system includes an optical element, which is deformed by the weight thereof, and at least one optical member for preventing a change...
6825980 DOE-based systems and devices for producing laser beams having modified beam characteristics  
Novel methods are disclosed for designing and constructing miniature optical systems and devices employing light diffractive optical elements (DOEs) for modifying the size and shape of laser beams...
6825979 Optical system having a diffractive optical element, and optical apparatus  
An optical system includes a diffractive optical element having a diffraction grating provided, on a lens surface having a curvature, in a concentric-circles shape rotationally-symmetrical with...
6822797 Light modulator structure for producing high-contrast operation using zero-order light  
An optical system provides high-contrast operation by collecting zero order light. The optical system comprises a light modulator and a collector. The light modulator is preferably a grating light...
6822796 Diffractive optical element  
A diffractive optical element has a diffraction grating formed by periodic depressions and projections on the surface of a substrate and a dielectric multilayer film on the diffraction grating. The...
6816648 Integrated waveguide gratings by ion implantation  
Integrated semiconductor waveguide gratings, methods of manufacture thereof and methods of apodizing thereof are described. A semiconductor waveguide grating includes a substrate, a cladding layer...
6813080 Metal-free gratings for wavelength-multiplexed optical communications  
The invention is directed to metal-free grating for use in wavelength optical communications, and in particular to metal-free, reflective immersed diffraction gratings. The gratings of the...
6801354 2-D diffraction grating for substantially eliminating polarization dependent losses  
A 2D diffraction grating light valve modulates an incident beam of light. A plurality of elements each have a reflective surface with their respective reflective surfaces substantially coplanar....
6798574 Prism diffuser for diffracting and spreading light  
The present invention relates to a prism diffuser for diffracting and spreading light, and in particular to a prism diffuser for diffracting and spreading light which is capable of spreading light...
6795248 Aberration compensating optical element, optical system, optical pickup device, recorder and reproducer  
An aberration compensating optical element includes: a diffractive structure having a plurality of ring-shaped zone steps formed into substantially concentric circles on at least one surface of the...
6791764 Optical element, metal die, and cutting tool  
An optical element has diffractive grooves. Each diffractive groove includes a first surface approximated by a predetermined optical function; a second surface extending in a direction to cross the...
6791754 Optical system having a diffractive optical element, and optical apparatus  
An optical system includes a diffractive optical element having a diffraction grating provided, on a lens surface having a curvature, in a concentric-circles shape rotationally-symmetrical with...
6788465 Littrow grating and use of a littrow grating  
A Littrow grating ( 1 ) comprises a multiplicity of parallel diffraction structures ( 3 ) succeeding one another periodically. The latter are arranged on a support ( 2 ) defining a base area ( 4 )....
6781756 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...
6778326 Combined heat filter and condenser lens, a projection type apparatus using such, and a method for fabricating it  
An optical component including: a substrate made from heat absorptive glass having a front surface and a rear surface, at least one of said surfaces being a crenulate surface having optical power.
6775066 Diffractive optical element  
The present invention provides a different optical element having superior optical characteristics. A polycrystalline substrate having crystal grains whose sizes are not more than 1 μm or an...
6775065 Diffraction element and optical pickup device  
In a diffraction element, a diffraction grating is formed with a grating pitch having different diffraction angles in accordance with a wavelength of a laser light beam incident thereon. The...
6775064 Objective lens for optical pick-up  
The objective lens is a biconvex plastic lens having first and second surfaces which are both aspheric. The objective lens is divided into an inside area which is inside of a circle of an effective...
6771435 Optical element, metal die, and cutting tool  
An optical element has diffractive grooves. Each diffractive groove includes a first surface approximated by a predetermined optical function; a second surface extending in a direction to cross the...
6762881 Optical arrangement, Littrow grating for use in an optical arrangement and also use of a Littrow grating  
An optical arrangement has a light source which emits coherent light of a specific wavelength. Further provided is an optical Littrow grating, arranged at a specific Littrow angle θ L . It has a...
6762880 Grating structures and methods of making the grating structures  
New grating structures include a bonded transmission grating structure. The grating structure is encapsulated by two pieces that are bonded together. In addition, a new method of making grating...
6760159 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...
6757105 Optical device having a wide field-of-view for multicolor images  
A diffractive optical element for guiding a light having a color spectrum characterized by a plurality of wavelengths longer than a shortest wavelength, λ B , and shorter than a longest...
6757104 Picture taking apparatus having diffractive optical element  
In order to obtain a diffractive optical element with which a high diffraction efficiency can be obtained in a wide wavelength range and color flare is not noticeable and a picture taking apparatus...
6754006 Hybrid metallic-dielectric grating  
A diffraction grating includes a metallic base layer and layers of dielectric materials of varying refractive index, where a bottom interface of the layers is adherent to the metallic base layer....
6753118 Optical grating fabrication process  
A grating fabrication process utilizes real-time measurement of a grating characteristic (such as, for example, grating period chirp, reflectivity, group delay) as a feedback error signal to modify...
6751381 Embodying amplitude information into phase masks  
A phase mask, for writing fiber Bragg gratings (FBG) in an optical fiber, adjusts the amplitude and the phase of the FBG, while maintaining a constant mean index of refraction of the fiber in a...
6751021 Optical scanning device  
The present invention provides a scanning device with the following features: the system is capable of writing data to record carriers of a first format because it is corrected for chromatic...
6750995 Enhanced volume phase grating with high dispersion, high diffraction efficiency and low polarization sensitivity  
An enhanced volume phase diffraction grating provides high dispersion, uniformly high diffraction efficiency and equal diffraction efficiencies for all polarizations across a wide range of...
6747799 High-efficiency low-polarization-dependent-loss lamellar diffraction-grating profile and production process  
A reflective lamellar diffraction grating is provided that is suitable for a variety of applications, including applications related to C-band telecommunication functions. The average efficiency of...
6731432 Off-axis diffractive beam shapers and splitters for reducing sensitivity to manufacturing tolerances  
A diffractive element used in conjunction with a grating to move a desired order beam off-axis, thereby reducing interference by undesired orders. Use of the off-axis grating allows a more uniform...
6728444 Fabrication of chirped fiber bragg gratings of any desired bandwidth using frequency modulation  
A method for manufacturing an optical waveguide refractive index grating having a desired grating pitch Λ. The method includes the step of providing a photosensitive waveguide and a writing beam...
6728036 Diffractive optical element and also optical arrangement comprising a diffractive optical element  
A diffractive optical element has a plurality of diffraction structures for a certain wavelength. These each have a width measured in the plane of the diffractive optical element and a height...
6728035 Optical device with diffraction grating having plural grating regions  
An optical device includes a light-emitting element for irradiating light onto an information recording medium, a diffraction grating for splitting light emitted from said light-emitting element...
6728034 Diffractive optical element that polarizes light and an optical pickup using the same  
A first diffractive optical element pattern with a pattern pitch that is no greater than a wavelength of incident light is formed on a first main surface of substrate such as a glass plate. Second...
6724534 Diffractive optical element and scanning optical apparatus using the same  
Diffraction optical element used in a scanning optical apparatus as a scanning optical element has a diffraction grating formed on a substrate. The diffraction grating has a tilt portion for...
6724533 Lamellar grating structure with polarization-independent diffraction efficiency  
A lamellar volume grating operating in reflection and transmission and providing a substantially wavelength- and polarization-independent diffraction efficiency is disclosed. The lamellar grating...
6707608 Diffractive optical element and a method for producing same  
The invention provides a method for producing a diffractive optical element, including forming first and second gratings, substantially in mutual registration, of at least first and second optical...
6704149 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...
6700705 Structure arrangement having an optical-diffraction effect  
In order to improve a structure arrangement comprising a plurality of portions having a relief structure with an optical-diffraction effect, in particular for visually identifiable optical security...
6694075 Apodization of optical filters with multiple exposures of photosensitive media  
Filter gratings are formed in optical waveguides having photosensitive cores by exposing the cores to actinic radiation in the form of interfering beams having peak intensities that are relatively...
Matches 201 - 250 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >