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8120730 |
Hybrid polarizer
A hybrid polarizer includes an absorbing element having a first major surface and a second major surface. The hybrid polarizer also includes a first birefringent reflective polarizer disposed on...
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7982955 |
Birefringent filter using reflective polarizers and dichroic elements
An optical filter uses two or more reflective polarizers together with retarders to form birefringent filters with controlled transmission. The energy reflected by these polarizers is absorbed by...
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7859753 |
Optical birefringence filters with interleaved absorptive and zero degree reflective polarizers
A wavelength discriminating optical filter has birefringent retarders stacked between polarizing filters, in relative rotational orientations causing passband wavelengths to emerge in a...
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7701633 |
Prism optical system and image pickup apparatus
A prism optical system including an optical low-pass filter disposed on an incident side of a luminous flux, and a prism arranged to perform a color separation to a plurality of color bands by an...
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7628493 |
Projector based on tunable individually-addressable Fabry-Perot filters
A projection system includes a display apparatus comprising a plurality of tunable Fabry-Perot filters, each of the filters being configured for shifting between a state in which the filter...
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7626154 |
Imaging device
Frequency characteristics of an optical low-pass filter (2) are set in such a way that a first false color passing rate indicative of the rate of frequency components passing through a frequency...
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7570425 |
System, apparatus and method for high efficiency low leakage LCD polarizer
An apparatus for a liquid crystal display includes a polarizer film configured to receive light from a liquid crystal display and an optical polarizer screen configured to filter light for the...
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7567382 |
Optical filter
An optical filter such that at least one optically anisotropic crystal plate and at least one substrate are stuck together in a state in which a principal face of the optically anisotropic crystal...
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7541600 |
Lithographic and measurement techniques using the optical properties of biaxial crystals
A method and apparatus for accurately retrieving the position of an optical feature. The method uses the optical properties of biaxial crystals to conically refract the optical feature and...
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7488237 |
Optical filter, production method for this optical filter and optical device using this optical filter and housing structure for this optical filter
An optical low pass filter is constituted by a quartz birefringent plate a quarter wavelength plate and a quartz birefringent plate layered in that order. Curved chamfered portions are formed at a...
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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...
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7397604 |
Narrow bandpass filter assemblies for solar telescopes
The invention relates to the combination of lower transmittance etalons with higher transmittance filters, including use of a single circular polarizer with high efficiency and optical performance...
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7394188 |
Phosphor based light source component
A method of making a light source includes the steps of forming a first optical component having a phosphor material in fixed relation to a first multilayer interference reflector, providing a...
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7371329 |
Method for filtering particles from a fluid
Methods for filtering particles from a fluid are disclosed, wherein an array of microstructures defining respective microchannels having respective minimum widths are used to separate the fluid...
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7362489 |
Multi-conjugate liquid crystal tunable filter
A hyper-spectral imaging filter has serial stages along an optical signal path with angularly distributed birefringent retarders and polarizers forming interference filters. The retarders can...
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7349089 |
High transmission multi-wavelength filter and method
An optical arrangement and method of filtering include a beam splitter that accepts an incident beam and transmits light from the incident beam of a first polarization and reflects light from the...
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7286290 |
Optical illumination apparatus
An optical illumination apparatus has a polarization conversion device for converting light from a light source into light polarized uniformly in a predetermined manner and an optical integrator...
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7268944 |
Optical interleaver, filter cell, and component design with reduced chromatic dispersion
An optical interleaver for use in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing...
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7251382 |
Functional tunable multichannel filter
Disclosed herein is a functional tunable multichannel filter which is capable of adjusting channel spacing and/or a wavelength location using polarization controllers (λ/2, (λ/4). The functional t...
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7245432 |
Dual diffraction-grating device
A diffraction grating device (100) has both reflecting (108) and transmitting (106) gratings inter leaved to allow both transmission diffraction patterns and reflection diffraction patterns to be...
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7227684 |
Method and system for providing beam polarization
A radiation polarizer, controller, and a method of radiation polarization and beam control, are disclosed. The radiation polarizer includes a substrate, at least one anti-reflection coating layer...
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7206465 |
All-fiber linear design depolarizer for all-states of polarization
An all-fiber, all-states of polarization linear design depolarizer is provided. It is made of two polarization combiners (PC1,PC2) with a 2×2 directional coupler (DC) between them. The connections ...
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7195356 |
Split-path color switching system and method
The present application describes a retarder stack color switch using a single polarization analyzer for reflective-mode projection displays. The single polarization analyzer permits additive mode...
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7196847 |
Device and method for an optical tunable polarization interface filter
The tuner has constituent component for constructing a tunable or switchable spectral filter, including single and multiple stage filters and fitters without intermediate polarizer, over a...
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7196797 |
Differential interferometer with improved cyclic nonlinearity
An interferometer system includes a plane mirror interferometer, a turning mirror, a retardation plate assembly having a retardation plate that can be adjusted and then fixed, and a retroreflector....
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7173763 |
Optical interleaver and filter cell design with enhanced clear aperture
An optical interleaver for use in a range of telecommunications applications including optical multiplexers/demultiplexers and optical routers. The optical device includes an optical processing...
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7170678 |
Optical color separation and synthesis system, and method of constructing optical color separation and synthesis system
An optical color separation and synthesis system is constructed according to a method, in which four first to fourth polarization beam splitters are arranged in such a manner that polarization...
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7164530 |
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...
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7154667 |
Birefringent networks
A birefringent network can be formed from a pair of beam directing elements that sandwich a birefringent filter. One of the beam director elements can be a polarizing beam splitter and the other of...
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7145719 |
Optical cores and projection systems containing the optical core
LCD projection systems that use reflective LCD imager units commonly use one or more polarization beamsplitters to separate the light incident on the imager from the light reflected by one or more...
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7130121 |
Erbium-doped fiber amplifier and integrated module components
An EDFA with integrated input and output modules is presented. The integrated input module has a packaged pump laser diode mounted to the metal EDFA package to provide a heat sink for the pump...
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7123412 |
Optical device
An optical device of the present invention comprises an image sensing device, a package for accommodating the image sensing device, the package including an opening of a square configuration as...
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7116848 |
Optical spectrum analyzer using a diffraction grating and multi-pass optics
A polarization independent optical spectrum analyzer comprises a diffraction grating, input and output slit means and polarization-maintaining multi-pass optics for directing a light beam to and...
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7113337 |
Multilayer optical coating
Anisotropic multilayer thin-film coating that may be used in fabrication of various optical elements, such as polarizers, beam splitters, interference-polarizing light filters, polarizing mirrors,...
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7106508 |
Hybrid cell
The present invention is a hybrid cell that utilizes a PBS pair in conjunction with a wedge tuner and a crystal to achieve a more stable interleaver. A first PBS splits an incoming optical signal...
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7106509 |
Filter for enhancing vision and/or protecting the eyes and method of making a filter
The selective filtering of light by polarization interference may be used to enhance vision and/or protect eyes from harmful light rays. For example, such filtering may be used in sunglasses, color...
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7102821 |
Apparatus and system for a re-configurable channel dropping de-multiplexer
An improved apparatus and system for a re-configurable optical channel dropping de-multiplexer is herein disclosed. A re-configurable channel dropping de-multiplexer in accordance with the present...
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7098442 |
Thin micropolarizing filter, and a method for making it
A polarizing filter includes a portion with a filtering layer having a plurality of openings extending therethrough, where this portion has a maximum physical thickness in a radiation travel...
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7088510 |
Anti-aliasing optical filter for image sensors
An anti-aliasing filter includes a polymeric double-refraction plate (“DRP”). The DRP of the anti-aliasing filter has at least a first liquid photo-polymerization (“LPP”) layer disposed on the sub...
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7075719 |
Optical filter and optical device provided with this optical filter
Light emitted from a taking lens 20 enters a first birefringent plate 1a to be spatially divided along a first direction extending perpendicular to the direction in which the light advances to...
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7038745 |
Brightness enhancing reflective polarizer
A multiple layer reflective polarizer 12 is described. This element is placed between and optical cavity 24 and an LCD module 16 to form an optical display. The reflective polarizer reflects some...
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7031060 |
Non-moving parts add/drop device
The instant invention provides an add/drop device including a wavelength filter, a quarter waveplate disposed on either side of the wavelength filter, and a polarizing beamsplitter disposed on...
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7019902 |
Beam forming telescope with polarization correction
An optical system for reforming a laser beam with azimuthal polarization having X and Y components into a beam with linear polarization has a multiplicity of optical elements, at least one of which...
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7019901 |
Wavelength periodical filter
Input light is split by a PBS into orthogonal polarized waves. One of the polarized waves is reflected by a mirror HR, and input to a 7λ/8 plate. The other is phase-controlled by a phase ...
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7009770 |
Multi-functional optical device utilizing multiple polarization beam splitters and non-linear interferometers
The present invention provides a multi-functional separator which may be used as a demultiplexer or as a multiplexer in wavelength division multiplexed optical communication systems. The preferred...
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7006279 |
Optical harmonic equalization control systems and methods
Devices and methods for equalizing the gain of an optical amplifier are described. For devices including harmonic filters that are controllable by amplitude control voltages and phase control...
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6996299 |
All-frequency PMD compensator and emulator
A PMD device includes a first stage that receives a signal and performs rotation about {1,0,0} on the signal. The first stage outputs a first signal. A second stage receives the first signal and...
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6982831 |
Athermal birefringent optical interleavers with flat-top passbands
A spectral interleaver providing flat top spectral transmission passbands and athermal operation is disclosed. The spectral interleaver may comprise a pentagon-shaped birefringent crystal, a...
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6965472 |
Nonreciprocal optical element with independent control of transmission opposite directions
A nonreciprocal optical element and method for operating it to effect separate control of intensity and phase (or optical path length) of counter propagating beams over a very wide range. The...
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6963448 |
Optical low-pass filter, and image sensing unit and apparatus using the same
If the thickness of a birefringence plate that forms an optical low-pass filter is not appropriately set, problems in terms of optical characteristics or machine works are posed. Hence, there is...
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