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| Number | Title | Issue Date |
| 7421212 | Detecting and locating pulses using a Bragg cell Detecting a pulse of a signal includes receiving the signal and a light beam. The signal drives a spatial light modulator to modulate the light beam, where the complex amplitude of the modulated light beam is proportional to the signal current. The modulated light b... | 09/02/2008 |
| 7375819 | System and method for generating beams of light using an anisotropic acousto-optic modulator A light source system includes a beam source generating a first input beam of light. An anisotropic acousto-optic modulator (AOM) is positioned to receive the first input beam. The AOM includes a plurality of transducers for receiving control signals and generating ... | 05/20/2008 |
| 7372576 | System and method for generating beams of light using an anisotropic acousto-optic modulator A light source system includes a beam source generating a first input beam of light with first and second beam components. The first component has a first linear polarization and a first frequency. The second component has a second linear polarization and a second f... | 05/13/2008 |
| 7292787 | Selected-wavelength tuning filter and optical add/drop multiplexer The present invention relates to the selected-wavelength tuning apparatus which is provided with an AOTF, a radio-frequency signal generator, an optical detector, and a controller for detecting lights emitted from the AOTF with the optical detector and for controlli... | 11/06/2007 |
| 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 |
| 7239439 | Communication system using variable pattern acousto-optic modulation A communication system uses a beam of light; a beam expanding lens; a lens for collimating the expanded beam into a column of collimated light; a plurality of acoustic transducers to project acoustic emanations perpendicularly to the column of collimated light, wher... | 07/03/2007 |
| 7206120 | Dynamic beam splitter outputting a selectable number of beams A dynamic beam splitter including a beam deflector having a plurality of operative regions, the beam deflector being operative to receive a laser beam at a first one of the plurality of operative regions, the laser beam passing through the beam deflector, and to sel... | 04/17/2007 |
| 7133186 | AOM modulation techniques employing transducers to modulate different axes Digital control of frequency and/or amplitude modulation techniques of an intracavity and/or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); fac... | 11/07/2006 |
| 7133187 | AOM modulation techniques employing plurality of transducers to improve laser system performance Digital control of frequency and/or amplitude modulation techniques of an intracavity and/or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); fac... | 11/07/2006 |
| 7132778 | Surface acoustic wave modulator An acoustic wave identification transponder device, having a substrate, an electroacoustic transfer generating an acoustic wave in said substrate and a set of encoding elements disposed in a path of the acoustic wave for modifying the acoustic wave, having elements ... | 11/07/2006 |
| 7133188 | AOM modulation techniques employing an upstream Bragg adjustment device Digital control of frequency and/or amplitude modulation techniques of an intracavity and/or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); fac... | 11/07/2006 |
| 7102809 | Acoustic-optic devices utilizing tellurium crystals Acoustic-optic devices which use a crystal of tellurium into which is launched acoustic shear waves by a lithium niobate transducer in accordance with an input RF signal. Tellurium used in the devices exhibits a figure of merit in the range of around 5,000 to 10,000... | 09/05/2006 |
| 7075698 | Variable lenslet array The disclosed invention provides a variable lenslet array system that comprises an acousto-optic medium and at least one acoustic wave generator that is positioned adjacent to the acousto-optic medium. The acoustic wave generator is adapted to generate standing acou... | 07/11/2006 |
| 7054055 | Acousto optic element An acousto optic element comprises optically transparent acousto optic medium having light incoming plane, light outgoing plane facing light incoming plane, transducer joining plane, and inclined plane tilted to transducer joining plane and piezoelectric transducer ... | 05/30/2006 |
| 7046425 | Multi-stage optical switching device An optical switching device contains an active stage coupled to a passive stage. The index of refraction in the active stage is variable to change the entry direction of a light beam into the passive stage, which has a fixed index of refraction. Because the light be... | 05/16/2006 |
| 7019891 | AOM modulation techniques employing plurality of tilt-angled transducers to improve laser system performance Digital control of frequency and/or amplitude modulation techniques of an intracavity and/or extracavity AOM (60) facilitate substantially full extinction of a laser beam (90) to prevent unwanted laser energy from impinging a workpiece (80); fac... | 03/28/2006 |
| 6972400 | Multi-mode vibration sensor laser A multimode remote vibration sensor. The inventive sensor (8) includes a mode locked laser transmitter (10); a receiver (30) adapted to detect signals transmitted by the laser (10) and reflected by an object (22) and a signal proce... | 12/06/2005 |
| 6947630 | Control method and control apparatus for variable wavelength optical filter The present invention has an object to provide a control method and a control apparatus for a variable wavelength optical filter, which can reliably and stably control drive conditions of the variable wavelength optical filter, independent of the number of wavelengt... | 09/20/2005 |
| 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 |
| 6856442 | Transmission line, optical module using the same and manufacturing method of optical module According to the present invention there are provided a transmission line and an optical module having the transmission line, the transmission line having on a dielectric substrate a first signal wiring conductor, a second signal wiring conductor insulated from the ... | 02/15/2005 |
| 6816301 | Micro-electromechanical devices and methods of manufacture Micro-eletromechanical devices, substrate assemblies from which the devices can be manufactured, and methods to manufacture the devices are disclosed. The invention combines the advantages of conventional surface and bulk micromachining processes using a sacrificial... | 11/09/2004 |
| 6765709 | Active compensation for transient thermal effects in acousto-optic devices A multi-channel acousto-optic modulator contains an integrated structure for providing active compensation for transient thermal effects. A plurality of electro-thermal elements in the form of resistive strips are interleaved with acoustic wave launching transducers... | 07/20/2004 |
| 6674564 | System, method and article of manufacture for a beam splitting acousto-optical modulator A system, method and article of manufacture is disclosed that provides an improved, more efficient, laser beam modulator and splitter. The combined device includes a crystal with a horizontal cross-sectional shape of a pentagon. The crystal includes a top... | 01/06/2004 |
| 6665112 | 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, an a second acoustooptical element which generates a virtual image with a concave lens effect to the... | 12/16/2003 |
| 6585397 | Reflector for a projection light source The object of the present invention is to effectively utilize the light rays emitted from a light source lamp 1, and, for accomplishing this object, a reflector 2 is made up of a first parabolic reflector 3 designed for reflecting light rays coming from t... | 07/01/2003 |
| 6560005 | Acousto-optic devices An acousto-optic device comprises a first light source for producing a light beam, a light-transmitting material capable of transmitting the light beam along an optical path through the light-transmitting material, a light-absorbing material adjacent to t... | 05/06/2003 |
| 6552837 | Optical modulator with integrated driver An integrated high speed driver/modulator assembly includes a driver amplifier assembly having a specified input impedance, such as 50 ohms. The driver/modulator assembly also includes an optical modulator having a modulator transmission line. The impedan... | 04/22/2003 |
| 6549247 | Ultrasonic liquid-crystal display An ultrasonic liquid-crystal display comprises a nonpiezoelectric bottom-plate, a piezoelectric substrate on a first surface-part of an upper end-surface of the nonpiezoelectric bottom-plate, at least one dispersive interdigital transducer on the piezoele... | 04/15/2003 |
| 6525814 | Apparatus and method for producing a spectrally variable radiation source and systems including same An apparatus and method for producing a spectrally variable radiation source and systems including same is disclosed. An embodiment of a spectrally variable radiation source is disclosed including a broadband radiation source, a collimating element, a dis... | 02/25/2003 |
| 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 |
| 6356379 | Adjustable opto-acoustical low pass filter and technique Apparatus for receiving light containing image-representative information, and low-pass filtering the light. A pellicle is positioned in the path of the light. At least one transducer is coupled with the pellicle and an AC electrical signal is applied to ... | 03/12/2002 |
| 6307665 | Acousto-optic modulator An acousto-optic modulator including an ultrasonic medium for controlling light from an optical source through diffraction, two transducers each having one electrode formed on one side thereof, the electrodes being for generating an acousto-elastic wave, ... | 10/23/2001 |
| 6285493 | Electro-acoustic-optical apparatus and method of calibrating same An optically defractive medium of a Bragg cell has a moving grating induced therein in response to acoustic waves propagating in the medium. First and second electro-acoustic transducers coupled to the medium launch first and second acoustic waves toward ... | 09/04/2001 |
| 6188507 | Variable acousto-optic spectrum projector and method of operation A variable acousto-optic spectrum projector is disclosed. The invention may include a radiation source, an entrance slit, a lens or mirror, a Bragg cell, an arbitrary function generator for driving a transducer of the Bragg cell, another lens or mirror, a... | 02/13/2001 |
| 6088150 | 3-Channel light modulator and modulation method for a high power laser A 3-channel modulation system for a high power laser and a modulation method for a high power laser are disclosed herein. In a preferred implementation, the modulation system includes a laser light source, a light modulator modulating the light generated ... | 07/11/2000 |
| 6081365 | Acousto-optic modulator and manufacturing method thereof An acousto-optic modulator comprised of an acousto-optic element coated with an anti-reflection layer, and a method of manufacturing the same, are provided. The acousto-optic modulator includes an anti-reflection layer, comprised of at least two coating l... | 06/27/2000 |
| 5923459 | Accusto-optic time-integrating correlator for processing broadband doppler-shifted signals This invention relates to an acousto-optic time-integrating correlator for rocessing broadband Doppler-shifted signals. The present invention uses a conical lens telescope to compensate, in one dimension, for the differences in the absolute values of Doppl... | 07/13/1999 |
| 5909304 | Acousto-optic tunable filter based on isotropic acousto-optic diffraction using phased array transducers An acousto-optic tunable filter based on isotropic acousto-optic diffraction using phased array transducers. The isotropic AOTF provides the advantages of narrow optical passband, low acoustic frequencies, and insensitivity to the input optical polarizati... | 06/01/1999 |
| 5900966 | Acoustic-optic modulator having two transducers An acousto-optic modulator having an ultrasonic medium for controlling light from a light source by diffracting the light and a transducer portion having electrodes for generating an acoustic wave in the ultrasonic medium, wherein the transducer portion i... | 05/04/1999 |
