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| Number | Title | Issue Date |
| 7729035 | Acousto-optic modulators for modulating light signals Devices for modulating light signals. A modulator includes a rolled optical fiber cable having a preset tensile stress along the longitudinal axis thereof, a coating layer applied to the rolled optical cable, and at least one piezo acoustic transducer secured to the... | 06/01/2010 |
| 7391550 | Method and apparatus for optical broadband frequency chirp Techniques for producing an optical broadband frequency sweep or chirp, include generating a narrowband frequency chirp and a frequency-shifted replica. The narrowband chirp has an optical carrier frequency, a pulse duration and a pulse bandwidth. A frequency-shifte... | 06/24/2008 |
| 7355657 | Laser illuminated projection displays A projection video display includes a light source including an OPS-laser delivering laser radiation in multiple transverse modes (a multiple-transverse-mode OPS-laser). The display includes a spatial light modulator for spatially modulating the radiation from the m... | 04/08/2008 |
| 7349590 | Polarization modulation interrogation of grating-coupled waveguide sensors An optical interrogation system and a GCW sensor are described herein that are used to determine whether a biological substance (e.g., cell, molecule, protein, drug) is located in a sensing region of the GCW sensor. The optical interrogation system includes a light ... | 03/25/2008 |
| 7330270 | Method to suppress artifacts in frequency-domain optical coherence tomography One embodiment of the present invention is a method for suppressing artifacts in frequency-domain OCT images, which method includes (a) providing sample and reference paths with a significant difference in their chromatic dispersion (b) correcting for the effects of... | 02/12/2008 |
| 7283290 | Acousto-optic devices having highly apodized acoustic fields and methods of forming the same An acousto-optic (AO) device for generating a highly apodized acoustic wave field includes a piezoelectric transducer crystal for emitting an acoustic wave having a ground electrode disposed on one side of the piezoelectric crystal, and a patterned electrode layer d... | 10/16/2007 |
| 7282716 | Digital imaging assembly and methods thereof A coherent radiation imaging system that produces digital images with a reduced amount of speckle. Radiation from a long coherence length source is used to form an image of a sample. The output coherent wave is temporally divided into a plurality of wavelets. The sp... | 10/16/2007 |
| 7281807 | Positionable projection display devices Described herein are devices that provide projection-type video output in a portable and flexible design. The design includes a projection chamber, a base, and an interface that permits relative positioning between the projection chamber and base. The base maintains... | 10/16/2007 |
| 7280265 | Interferometric modulation of radiation An Interferometric Modulator (IMod) is a microelectromechanical device for modulating light using interference. The colors of these devices may be determined in a spatial fashion, and their inherent color shift may be compensated for using several optical compensati... | 10/09/2007 |
| 7259851 | Optical measurements of properties in substances using propagation modes of light This application describes designs, implementations, and techniques for controlling propagation mode or modes of light in a common optical path, which may include one or more waveguides, to sense a sample. ... | 08/21/2007 |
| 7245789 | Systems and methods for minimally-invasive optical-acoustic imaging This document discusses, among other things, an imaging guidewire that includes one or more optical fibers communicating light along the guidewire. At or near its distal end, one or more blazed or other fiber Bragg gratings (FBGs) directs light to a photoacoustic tr... | 07/17/2007 |
| 7244028 | Laser illuminated projection displays A projection video display includes at least one laser for delivering a light beam. The display includes a beam homogenizer and a condenser lens. A scanning arrangement is provided for scanning the light in beam in a particular pattern over the condenser lens in a m... | 07/17/2007 |
| 7187864 | Frequency comb analysis Methods and apparatus for generating a frequency comb and for its use in analyzing materials and in telecommunications. The frequency comb is generated by passing pulsed light from a laser through an optical fiber having a constriction. The frequency comb comprises ... | 03/06/2007 |
| 7126693 | Simple high efficiency optical coherence domain reflectometer design The present invention discloses simple and yet highly efficient configurations of optical coherence domain reflectometry systems. The combined use of a polarizing beam splitter with one or two polarization manipulator(s) that rotate the returned light wave polarizat... | 10/24/2006 |
| 7057799 | Tuning a narrow band filter for telecommunication applications with an acoustic optical tunable filter An optical tunable filter that includes a thin-film filter for band-passing at least two bands of wavelengths. The tunable filter further includes a tunable band-passing device tunable over the at least two bands for tuning to a tunable pass-band spectrally overlapp... | 06/06/2006 |
| 7006715 | Optical modulator of clock modulation type A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first ... | 02/28/2006 |
| 6990260 | Extended intensity-based optical sensor An extended optical sensor comprises a plurality of equally spaced intensity-based point sensors connected in parallel such that the optical path lengths are the same within the extended sensor enclosure. The input to the extended sensor is a single optical fiber as... | 01/24/2006 |
| 6982820 | Color changeable pixel A color changeable pixel comprises a first plate, a second plate and a third plate. The three plates are settled in parallel. The second plate is a deformable and reflective plate. An incident light from one side of the first plate is modulated and only specific fre... | 01/03/2006 |
| 6943881 | Measurements of optical inhomogeneity and other properties in substances using propagation modes of light This application describes designs, implementations, and techniques for controlling propagation mode or modes of light in a common optical path, which may include one or more waveguides, to sense a sample. ... | 09/13/2005 |
| 6906844 | Mounting system for an optical assembly of a photoelastic modulator An improved system for mounting an optical assembly of a photoelastic modulator (PEM) to permit free vibration of the optical assembly without introducing any stress or strain on the optical element. Moreover, the mounting system, which includes a mounting block ( | 06/14/2005 |
| 6903820 | Measurements of substances using two different propagation modes of light through a common optical path This application describes designs, implementations, and techniques for controlling propagation mode or modes of light in a common optical path, which may include one or more waveguides, to sense a sample. As an example, input light in two different optical propagat... | 06/07/2005 |
| 6885491 | Diffraction-optical component, illumination system and exposure system comprising such a diffraction-optical component as well as an exposure method employing such an exposure system A diffraction-optical component for providing a radiation-diffracting grating structure is proposed, comprising a surface wave device including a substrate 43, a surface wave source 47 excitable with an adjustable frequency for producing surface waves ... | 04/26/2005 |
| 6882374 | Image projection system A DMD (4) as a image display device time divisionally displays channel images formed by separating an image into RGB channels. A white light emitted from a xenon lamp (1) is separated, by an acousto-optical element (3), into spectal components. ... | 04/19/2005 |
| 6836610 | Electrical variable optical attenuator An electrical variable optical attenuator (10) of the present invention has a housing (1), a cover (2), an attenuating means (3), an optical module (4), an electrical driving element (5), an input fiber (87) and an ou... | 12/28/2004 |
| 6806986 | Wavelength converter and wavelength converting apparatus A wavelength converter has a phase modulated periodically modulated structure, where a nonlinear optical coefficient is periodically modulated at a fundamental period Λ0 and the phase of the modulation varies nearly continuously, and the phase variation ... | 10/19/2004 |
| 6804042 | Method for producing highly accurate frequency and FM of a laser A method and apparatus for accurately and precisely controlling the frequency (wavelength) and periodic frequency modulation of a laser are provided. An ADC (Analog to Digital Converter) is used to sample the output of a modified interferometer used as a delay line ... | 10/12/2004 |
| 6771412 | Acousto-optical devices The present invention relates to acousto-optic applications of parametric optical apparatuses that use the mechanical energy of elastic oscillations to convert light over a wide range of wavelengths and amplitudes and to generate coherent light. ... | 08/03/2004 |
| 6741381 | Modified tunable acousto-optic filter Acousto-optical filter systems for filtering a light beam by generating undiffracted and diffracted light beams within a birefringent crystal and by suppressing the diffracted beam within or at a face of the crystal. Where the two beams are noncollinear, an aperture... | 05/25/2004 |
| 6654127 | Optical delay line One embodiment of the present invention is an optical delay line that comprises a plurality of optical elements in optical communication with each other, wherein: (a) at least one of the plurality of optical elements is capable of spatially dispersing a s... | 11/25/2003 |
| 6600590 | Speckle suppressed laser projection system using RF injection A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a semiconductor laser light source (12) for a projection system (10... | 07/29/2003 |
| 6587255 | Acousto-optic scanning system with fast non-linear scan An acousto-optic scanning system, which relies on two counter propagating acoustic waves with the same frequency modulation. This scheme completely suppresses the linear frequency chirp, and thus enables the generation of fast non-linear scans and non-con... | 07/01/2003 |
| 6538795 | Optical reticle substrate inspection apparatus and beam scanning method of the same An optical reticle substrate inspection apparatus is provided with a laser, a first acoustooptical element which scans a laser beam output from the laser, and a second acoustooptical element which generates a virtual image with a concave lens effect to th... | 03/25/2003 |
| 6490075 | Acousto-optic tunable filter hyperspectral imaging system The present invention has applications that include detecting color variation in a region, for example, color variations due to temperature changes in an area of ocean water, and, in a more specific application, detecting bioluminescence of certain organi... | 12/03/2002 |
| 6454437 | Ring lighting An illuminator has a printed circuit board supporting a ring of light emitting diodes (LEDs). An annular Fresnel lens and the board are both mounted in a housing having a central though-hole for a camera field of view. The lens mixes light from the LEDs i... | 09/24/2002 |
| 6445487 | Speckle suppressed laser projection system using a multi-wavelength doppler shifted beam A system and method for reducing or eliminating the speckle intensity distribution of a laser imaging system. In one embodiment of the invention, a radio frequency signal is injected into a semiconductor laser light source (12) for a projection system (10... | 09/03/2002 |
| 6433916 | Octave spectra acousto-optic tunable filter A method for increasing the tunable range of a single acousto-optic tunable filter includes the steps of generating an active steering beam on a piezoelectric transducer and configuring the electrodes of the piezoelectric transducer to reduce the tuning f... | 08/13/2002 |
| 6424451 | Phase array acousto-optic tunable filter based on birefringent diffraction An acousto-optic tunable filter (AOTF) utilizing phased array transducers for use as dynamically reconfigurable wavelength division multiplexer. The new type of AOTF has the unique capability of simultaneous and independent selection of multi-wavelength s... | 07/23/2002 |
| 6421164 | Interferometeric imaging with a grating based phase control optical delay line An apparatus for performing high speed scanning of an optical delay and its application for performing optical interferometry, ranging, and imaging, including cross sectional imaging using optical coherence tomography, is disclosed. The apparatus achieves... | 07/16/2002 |
| 6392821 | Light display projector with wide angle capability and associated method A projector for producing a visually perceptible light image along predetermined vector coordinates, includes a light source for producing a beam of light along a light path; a deflector positioned to deflect the beam of light along the vector coordinates... | 05/21/2002 |
| 6356088 | Highly compact laser scanning microscope with integrated short-pulse laser The invention describes a highly compact laser scanning microscope with integrated short-pulse laser. Direct coupling or a fiber coupling of the short-pulse laser with the laser scanning microscope is advantageously circumvented with this arrangement. Thi... | 03/12/2002 |
