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7440158 |
Direct optical image projectors
An apparatus includes a reconfigurable spatial light modulator, a light source, and a transmission filter. The reconfigurable spatial light modulator is capable of producing spatially varying...
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7428099 |
Optical security system using fourier plane encoding
A method of verifying the authenticity of an object is disclosed. The method may include encoding a primary image, convolving the encoded primary image with a random code, generating thereby a...
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7423808 |
Rear projection screen with spatial varying diffusing angle
A Fresnel lens of the prior art is split into two Fresnel lenses to allow easier control of the horizontal and vertical viewing angles. In a second embodiment, the Fresnel lens is entirely...
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7397557 |
Serrated Fourier filters and inspection systems
Serrated Fourier filters and inspection systems are provided. One Fourier filter includes one or more blocking elements configured to block a portion of light from a wafer. The Fourier filter also...
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7391570 |
Programmable optical processing device employing multiple controllable light modulator elements in fractional fourier transform planes
A programmable optical processing device employing a plurality of controllable light modulator elements. First and second optical elements are positioned to create an optical region therebetween...
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7365917 |
Optical method and system for extended depth of focus
An imaging arrangement and method for extended the depth of focus are provided. The imaging arrangement comprises an imaging lens having a certain affective aperture, and an optical element...
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7345754 |
Fourier filters and wafer inspection systems
Fourier filters and wafer inspection systems are provided. One embodiment relates to a one-dimensional Fourier filter configured to be included in a bright field inspection system such that the...
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7330659 |
Wavelength filter that operates on sets of wavelength channels
A wavelength filter, for filtering a WDM signal, comprises a demultiplexer, a multiplexer, and a control array connecting the demultiplexer and the multiplexer, where the demultiplexer and the...
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7330657 |
Method to demultiplex wavelengths of light
An apparatus and method for demultiplexing multiple wavelengths of light. In one embodiment, an optical signal having a plurality of wavelengths is provided to an optical-to-electrical (OE) circuit...
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7237940 |
Light guide plate with subwavelength grating and backlight module using the same
A light guide plate ( 30 ) has a light incident surface ( 305 ) for receiving light, a light emitting surface ( 301 ) for emitting light, a bottom surface ( 303 ) opposite to the light emitting...
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7230603 |
Illumination device and display device using the same
An illumination device and display device using it display motion pictures without a blur and make a light utilizing efficiency of a backlight improved. An illumination device having a light pipe...
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7227687 |
Complex spatial light modulator
One embodiment relates to a spatial light modulator (SLM) for modulating light incident thereon. The SLM includes a plurality of pixels, each pixel including a plurality of phase shift elements....
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7221515 |
Optical diffraction element
An optical diffraction element ( 1 ) comprises a diffraction layer ( 4 ) which is divided into diffraction strips ( 6 ) alternating with intermediate strips ( 8 ). The diffraction strips comprise...
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7215302 |
Display device, position adjustment pattern display program, recording medium, polarized glasses, and method of adjusting position of filter of the display device
Even if a divided wavelength plate filter is mounted, it is possible to reliably display a three-dimensional image or perform a displaying operation on from one screen to a plurality of screens. In...
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7106510 |
Wavefront coded imaging systems
The present invention provides improved Wavefront Coding imaging apparatus and methods composed of optics, a detector, and processing of the detected image. The optics are constructed and arranged...
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7061693 |
Optical method and system for extended depth of focus
An imaging arrangement and method for extended the depth of focus are provided. The imaging arrangement comprises an imaging lens having a certain affective aperture, and an optical element...
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7057786 |
Electro-optic array interface
A grating coupled surface plasmon resonance optical modulator is disclosed. A electro-optic polymer dielectric is deposited on the metallic surface of a diffraction grating to provide a...
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7050235 |
Diffractive optical spectral filter having arbitrary amplitude and phase response
A diffractive optical filter having a fractional level density s[j] and a transfer function C[m] that is an approximation to a desired Hermitian, passive transfer function B[m] is provided. The...
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7012749 |
Optical processing
A method of performing a DFT (discrete Fourier transform) or a DFT derived transform on data, comprising: providing spatially modulated light having spatial coherence, said spatially modulated...
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7006215 |
Shaped illumination geometry and intensity using a diffractive optical element
A method and apparatus to illuminate a target. The apparatus can comprise a first lens configured to receive light from the light source, a diffractive optical element configured to receive the...
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6975786 |
Optical switching with ferroelectric liquid crystal SLMs
An optical switch uses two ferroelectric liquid crystal spatial light modulators ( 10, 11 ) with an interconnect region in between. The switch uses bulk lenses ( 2, 8 ) to focus light from an input...
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6972905 |
Non-positive-definite optical filtering from positive-definite transfer functions
Fractional Fourier transform properties of lenses or other optical environments are applied to one or more positive-definite optical transfer functions at locations outside the Fourier plane to...
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6961456 |
Method and apparatus for reading and decoding information
A method and apparatus is disclosed for reading and decoding information extracted from a form. In the system of the present invention, packages are randomly placed on a conveyor belt, with their...
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6911637 |
Wavefront phase sensors using optically or electrically controlled phase spatial light modulators
Systems for optical wavefront sensing and control based on a phase contrast Fourier domain filtering technique. Optically or electronically controlled phase spatial light modulators (SLM) are used...
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6907124 |
Optical encryption and decryption method and system
The invention relates to securing of information utilising optical imaging technologies and more specifically to phase encryption and decryption of images. An image is encrypted into a mask having...
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6894748 |
Bump structure of a scattering reflective board and method for manufacturing the bump structure
A bump structure of a scattering reflective board and a method for manufacturing the bump structure. Multiple strip-shaped shielding sections are arranged on an optical mask at intervals. Multiple...
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6844947 |
All-optical holographic code division multiple access switch
A technique for processing optical input signals to produce optical output signals using only a single hologram for a plurality of circularly shifted code words used to encode the input signals. A...
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6842285 |
Method and apparatus for generating a phase-modulated wave front of electromagnetic radiation
The present invention provides a method and a system for generating a phase-modulated wave front. According to the present invention, the spatial phase-modulation is not performed on the different...
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6832003 |
Method and apparatus for reading and verifying holograms
A system and method for reading the information stored in holograms and other diffractive objects. The information is read by analyzing the diffraction pattern produced when a laser beam is focused...
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6762882 |
System and method for use of dark field fourier diaphragm in multi-frequency imaging
An imaging system is disclosed that includes an illumination source, a modulator and a variable Fourier diaphragm. The illumination source produces a first illumination field having a first...
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6747781 |
Method, apparatus, and diffuser for reducing laser speckle
A method of reducing speckle includes dividing a laser illuminated area into phase cells, subdividing the phase cells into cell partitions, and applying a temporal phase variation to the cell...
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6744502 |
Shaped illumination geometry and intensity using a diffractive optical element
A method and apparatus to illuminate a target. The apparatus can comprise a first lens configured to receive light from the light source, a diffractive optical element configured to receive the...
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6678411 |
Apparatus and method for characterizing, encoding, storing, and searching images by shape
An optical image characterizer 10 detects light energy as discrete angular orientations of a slit in a rotating spatial filter positioned at the focal plane of a Fourier transform lens, where a...
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6671452 |
Luminaire device
An optical device for collecting light and selectively outputting or concentrating the light. A layer has an optical index of referaction n 1 , and top, bottom and side surfaces defining an angel...
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6657786 |
Synthesis of supergratings by fourier methods
The present invention relates to a method for synthesizing supergratings using Fourier analysis. The method divides the synthesis process into two stages: synthesis of an “analog” grating...
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6650476 |
Image processing utilizing non-positive-definite transfer functions via fractional fourier transform
Fractional Fourier transform properties of lenses or other elements or optical environments are used to introduce one or more positive-definite optical transfer functions outside the Fourier plane...
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6636293 |
Exposure method and apparatus having a decreased light intensity distribution
A method and apparatus for transferring a fine pattern ( 12 ) on a mask ( 11 ) onto a substrate ( 17 ) by a projection exposure apparatus including an illumination optical system ( 1 - 10 ) for...
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6631017 |
Matched amplification and switch joint transform correlator
A matched amplification correlator transforms input images projecting a real time hologram upon a holographic storage device and a spatial light modulator, optically coupled to the storage device,...
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6602596 |
Light diffusion sheet
There is provided a light diffusion sheet comprising a light diffusion layer formed on a transparent substrate and containing a binder resin and resin particles that impart an uneven surface,...
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6577429 |
Laser projection display system
A display apparatus includes a laser light source for emitting a light beam having a coherence length; a beam expander for expanding the light beam; a spatial light modulator; beam shaping optics...
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6570708 |
Image processing apparatus and method with locking feature
An optical coherent processor or correlator for processing an input image produced by an imaging device illuminated by a coherent light source utilizes an optical key for preventing unauthorized...
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6555955 |
Front panel for display
The present invention provides to a front panel for a display in which the light transmittance of the front panel at a wavelength of 450 nm is higher than the light transmittance at a wavelength of...
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6525879 |
Optical filtering apparatus and method
An optical filtering apparatus and method, wherein at least one polarizer is located in the path of radiation passing through a birefringent medium. The invention can be used to process...
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6466374 |
Iridescent film with multidirectional variable optical stripes
Iridescent film with multidirectional variable optical stripes, including multiple very thin laminated films. The films are respectively made of different transparent plastic materials with...
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6424449 |
Optical information processing apparatus for image processing using a reflection type spatial light modulator
A collimator optical system collimates light from the coherent light source. A reflection type spatial light modulator returns collimated light from the collimator optical system to the collimator...
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6421178 |
Device and method for transforming optical beams
The invention concerns a device for optically transforming at least a radiation beam having a width extending in the plane X-Y. The device including optical elements provided with optically active...
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6335999 |
Multilayer luminaire device
An optical device for collecting light and selectively outputting or concentrating the light. A layer has an optical index of referaction n 1 l, and top, bottom and side surfaces defining an angel...
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6314210 |
Multiplexing optical system
A multiplexing optical system capable of processing input information at high speed and with high accuracy and having an easy-to-align simplified arrangement. A parallel-beam generating device (11,...
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6310724 |
Image display apparatus
To effectively make a mesh of out lines between pixels by a pixel diffusion and at the same time to facilitate a focusing of an image by the observer, an optical filter for diffusing each pixel of...
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6292304 |
Apparatus for generating independent coherent beam array
An apparatus for generating an independent coherent beam array from a single light source, in which individual coherent beams are selectively activated. The independent coherent beam array...
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