Matches 601 - 650 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >
Match Document Document Title
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...
5124843 Array illuminator using a binary optics phase plate  
An optical element for converting a uniform beam of light of wavelength λ into an array of illuminated spots, the optical element including a phase plate made of an array of constant phase zones;...
5122903 Optical device and optical pickup device using the same  
An optical element having a substrate and a composite grating pattern formed thereon. The pattern is constituted with two different kinds of grating patterns superimposed on the substrate. When one...
5121980 Small aperture multifocal  
An optical device suitably employable in intraocular and contact lenses that employs a phase zone plate of a Cohen lens design that relies on a small number of zones to provide multifocal images.
5121979 Diffractive multifocal optical device  
A bifocal lens of the Cohen lens design utilizing phase zone plate optics and a facet depth of one-half wavelength of the design wavelength, where the primary focal points are at two orders,...
5117306 Diffraction bifocal with adjusted chromaticity  
A diffraction bifocal lens or lens system, comprising two profiled surfaces or interfaces or a linear combination thereof, wherein one profile provides for the bifocality of the lens and the other...
5116461 Method for fabricating an angled diffraction grating  
A method for fabricating an angled diffraction grating (12) is provided. An optical medium (13) with fine lines and spaces that are defined in an etch mask is provided. Transferring the defined...
5116111 Multi-focal diffractive ophthalmic lenses  
A multifocal ophthalmic lens has diffractive power produced by a plurality of concentric zones. The zones have radii that meet the condition R 0 2 is not equal to R 1 2 -R 0 2 where R 0 is the...
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...
5113286 Diffraction grating apparatus and method of forming a surface relief pattern in diffraction grating apparatus  
A phase diffraction grating apparatus which is usable to generate an array of N spots, where n is an even integer, and the N spots are substantially equally spaced. The generation of an even number...
5111449 Optical pick-up device using diffraction grating element having two sub-regions  
An optical pick-up device for focusing a laser beam emitted from a light emitting element through an optical system onto a recording medium. The beam is reflected from the recording medium and...
5104209 Method of creating an index grating in an optical fiber and a mode converter using the index grating  
This invention relates to a method of creating an index grating in an optical fiber comprising disposing a slit mask containing one or more slits over a side of an optical fiber, illuminating the...
5103324 Method for fabricating holographic filters  
A method for generating holographic optical elements such as power spectrum filters is carried out using a printer and a computer. A signal function is input into the computer and traced by the...
5100226 Diffractive ophthalmic lens for correcting astigmatism  
An artificial eye lens such as a contact lens or intra-ocular lens corrects astigmatism by two sets of substantially linear parallel zones arranged to diffract light predominantly into one order at...
5091798 Diffraction grating for optical scanning  
A diffraction grating comprises the plurality of grating rings provided at positions such that their radii r are selected so that a function φ(r) of r satisfies the following differential equation...
5089903 Display apparatus  
A display apparatus comprises a display, a first diffraction grating for diffracting light from the display, and a second diffraction grating for diffracting diffracted light from the first...
5089835 Phase-type diffusing plate  
A focusing screen suited to be used in the camera, having three plane portions of different heights in each of small areas, wherein the plane portion A, the plane portion B and the plane portion C...
5085496 Optical element and optical pickup device comprising it  
An optical element comprises a polarization diffraction element that is provided with diffraction gratings that are respectively mounted on different faces of a transparent substrate of a flat...
5080465 Diffraction grating and method of making  
A diffraction grating, comprises a plurality of grooves formed by a plurality of first facets having a first set of propagative optical characteristics. All facets are generally positioned with a...
5078495 Monochromator  
A plane grating, particularly for a monochronomator, is provided with varied-spaced straight and parallel grooves in a light beam path to compensate for other light affecting components, for...
5075800 Method of optimizing holographic optical elements  
A method of designing a holographic optical element (diffractive grating) that transforms a set of waves into another set of waves in order to minimize aberrations in the phase of the output...
5066100 Binary alignment corrector  
There is provided by this invention a binary alignment corrector for correcting the directional errors caused by non-linear placement or "bowing" of diodes within laser arrays. The binary alignment...
5065380 Diffraction grating for an optical pickup device  
An optical pickup device for focusing an irradiating ray from a light emitting element on a recording medium and letting a reflected ray reflected from this recording medium focus on a light...
5061025 Hologon scanner with beam shaping stationary diffraction grating  
In a laser scanner of the type having beam shaping means and a stationary diffraction grating for directing the shaped beam to a hologon scanning disc, the beam shaping means is combined with the...
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...
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...
5052766 Halographic grating and optical device incorporating the same  
In formulating a groove pattern for a diffraction grating by means of holography, unique groove patterns are obtained by use of astigmatic coherent beam as either one or two recording beams....
5048925 Quasi volume diffracting structures  
A structure for responding to incident radiation for directing said radiation in a selected direction with respect to the structure, the structure using at least two outer diffraction elements and...
5033817 Scale for use with opto-electronic scale reading apparatus  
A scale for use with scale reading apparatus having grooves spaced along its length at a pitch P. Each groove is made with a shape or depth variation along its length to provide a scatter mechanism...
5032003 Optially variable surface pattern  
An article of manufacture including an optically variable surface pattern is disclosed. The optical surface pattern makes visible one out of a plurality of N image representations for each one out...
5029154 Optical reproducing apparatus  
An optical reproducing apparatus has a dual grating provided with a substrate, a first diffraction grating and a second diffraction grating. The first grating receives an incident light reflected...
5026131 High channel density, broad bandwidth wavelength division multiplexer with highly non-uniform Bragg-Littrow holographic grating  
A wavelength division multiplexer/demultiplexer having optical path lengths between a fiber array and a Fourier transform lens, and between a dispersion grating and the lens equal to the focal...
5025464 Pseudo-random support structure for transmission gratings  
A transmission grating in which the vertical supports are equidistantly sed from each other in each of the horizontal rows but have their positions relative to each vertical support in all of the...
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...
5016954 Optical pickup and hologram therefor  
An optical pickup for picking up signals from an optical disk comprises a hologram to split a laser beam emitted from a laser light source into one 0th diffraction light beam and two 1st...
5013141 Liquid crystal light modulation device  
A functional optical element has at least one diffraction grating in which first and second elements are alternately arranged. At least one of the first and second elements comprises an optically...
5009484 Diffraction gratings having high efficiencies  
A diffraction grating structure in the form of a substrate having a grating portion at an input surface thereof and a solid portion at an output surface thereof. A plurality of diffracting elements...
5007709 Diffraction grating and manufacturing method thereof  
A diffraction grating has a reflection film formed on a photosensitive layer disposed on a substrate through exposure followed by development and the groove profile thus formed has a configuration...
5007708 Technique for producing antireflection grating surfaces on dielectrics, semiconductors and metals  
A method of forming an antireflection rectangular-groove surface-relief grating on a lossy substrate exposed to incident waves of transverse electric or transverse magnetic or combination of...
4998800 Optical low pass filter  
An optical low pass filter for use in an imaging device including an objective lens and a solid state image sensor forming a plurality of picture elements thereon, which filter comprises a...
4986641 Retrofocus objective lens and optical scanning device provided with such a lens  
An objective lens (20) and an optical scanning device (30, 20, 50) provided with such a lens are described, of which lens both surfaces (22, 23), viewed from the object side, are concave, while 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...
4976513 Tunable wavelength filter  
A tunable wavelength filter comprises a plurality of distributed feedback sections and a phase-control section provided between the distributed feedback sections. The bandgap energy of the...
4972075 Automatic focusing system with dual diffraction gratings and converging means  
An automatic focusing system for forcusing on an optical disk, the system including a laser beam source, an objective lens, a photodetector for detecting a focusing error, a beam splitter disposed...
4946231 Polarizer produced via photographic image of polarizing grid  
A method of forming polarization grids for infrared optic systems is provd which uses conventional photographic media such as ordinary black and white film or plates in conjunction with a silver...
4940308 Laser beam stop  
A soft-edge stop for a laser beam includes a passing zone, a transition zone and a blocking zone. The transition zone includes a diffraction grating the diffraction efficiency of which varies...
4938553 Arrangement for an integrated optical spectrometer and the method for manufacturing the spectrometer  
An arrangement for an integrated optical spectrometer having an optical film waveguide and a focusing optical grating with grating lines extending perpendicular to a plane of the film waveguide...
4933649 Coherent aperture filling of an array of lasers  
A technique for coherent aperture filling by amplitude phase exchange is described which suppresses the far field side lobes of an array of lasers. The power contained in these side lobes is...
4915475 Optical resonator especially for stabilizing a laser source  
An optical resonator for stabilizing a laser source is useful for homodyne and heterodyne applications. The structural resonator length is considerably reduced by placing a laser source, such as a...
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...
Matches 601 - 650 out of 744 < 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 >