Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8064121 | Acousto-optical component An acousto-optical component is suggested, in particular for use in the beam path of an optical arrangement, preferably of a microscope, with a crystal for the passage of light. Sound waves are generated via an electrical transducer and passed through the crystal. T... | 11/22/2011 |
| 7965437 | Integrated high efficiency multi-stage acousto-optic modulator An acousto-optic modulator for a Q-switch (300) for a laser includes a monolithic acousto-optic (a-o) medium (311), a series of at least two acoustic transducers (321, 322), bonded spaced apart on the a-o medium, which emit first and second colu... | 06/21/2011 |
| 7920318 | Photoelastic modulator system A photoelastic modulator (PEM) has two parts (11, 13) of the same or dissimilar cross sections, joined together to form an abrupt junction (16). A transducer, for which the natural oscillation is at the half acoustic wavelength mode, excites a longitud... | 04/05/2011 |
| 7855823 | Acoustooptic device and optical imaging apparatus using the same The present invention provides an acoustooptic device usable even with light in the ultraviolet region, free from laser damage and optical damage, and excellent in acoustooptic performance and an optical imaging apparatus using the same. The acoustooptic device acco... | 12/21/2010 |
| 7821698 | Light pulse positioning with dispersion compensation A light pulse positioning apparatus with dispersion compensation includes an acousto-optical device and a dispersive element optically coupled thereto. The dispersive element is placed and oriented in relation to the acousto-optical device to spatially and temporall... | 10/26/2010 |
| 7706047 | Acousto-optical laser scanner and UV laser analyzer of micro-objects based on it Two-coordinate AO laser scanner for 355 and 266-nm UV wavebands utilizing AO cells with specially shaped TeO2 and KDP AO crystals, and equipped with LiNbO3 pulse-fed transducers of special configuration that allows enlarging scanning angle. Thi... | 04/27/2010 |
| 7623285 | Method and device for opto-acoustical imagery The inventive method for opto-acoustical imagery of an image object consists in a) generating an incident optical wave and a reference optical wave coherent therewith, b) oscillating the image object area at an acoustic frequency, c) sending the incident wave to sai... | 11/24/2009 |
| 7593155 | Active temporal modulation of ultrashort pulse trains using reconfigurable optical gratings A system and method for the temporal and phase modulation of beams through a series of electronically controlled grating modulators, as acousto optic devices (AODs), is provided where incoming electromagnetic radiation may be advanced or retarded by introducing a ti... | 09/22/2009 |
| 7548364 | Ultra-fast beam dithering with surface acoustic wave modulator An apparatus for processing a coherent light pulse comprises a piezoelectric material having an optical interface surface and a surface acoustic wave (SAW) producing device disposed on the piezoelectric material. A coherent light pulse is dithered at a high frequenc... | 06/16/2009 |
| 7538929 | RF phase modulation technique for performing acousto-optic intensity modulation of an optical wavefront An acousto-optic modulator includes an acousto-optic bulk medium and transducer attached to the acousto-optic bulk medium and formed as a linear array of electrodes. A transducer driver is connected to each electrode and is coherently phase driven to alter the angul... | 05/26/2009 |
| 7535617 | Portable acousto-optical spectrometers A portable acousto-optical (AO) spectrometer system comprised of at least one AO crystal cell device specially designed for cancellation of side-lobe noise at a desired tuned wavelength of operation. Each AO crystal cell device has a transducer attached and forms an... | 05/19/2009 |
| 7518779 | Acousto-optic devices having extended temperature reliability An acousto-optic modulator includes an acousto-optic bulk medium and transducer attached to the acousto-optic bulk medium. The transducer includes an electrode circuit and plurality of piezoelectric platelet segments attached to the bulk medium and supporting the el... | 04/14/2009 |
| 7483196 | Apparatus for multiple beam deflection and intensity stabilization A multiple beam generator for use in a scanning system, wherein the generator includes an acousto-optic deflector (AOD) which during use receives a laser beam and generates a deflected beam, the deflection of which is determined by an AOD control signal; a diffracti... | 01/27/2009 |
| 7443567 | Image enhancement of a microdisplay through acoustooptics A method of processing light includes generating a beam of light and periodically diffracting the beam of light by an acoustooptic cell to produce diffracted light having at least one direction change from the generated light. The method further includes spatially i... | 10/28/2008 |
| 7414773 | Device for dispersing light pulses of which the spectral amplitude is programmable Device for dispersion of light pulses of an optical beam constituted by two dispersive prisms with the same vertex angle, mounted head to tail, the optical input surface of the first prism being parallel to the optical output surface of the second prism, the distanc... | 08/19/2008 |
| 7405414 | Method and apparatus for patterning a workpiece The present invention relates to a method for creating a pattern on a workpiece sensitive to electromagnetic radiation. Electromagnetic radiation is emitted onto a computer controlled reticle having a multitude of modulating elements (pixels). The pixels are arrange... | 07/29/2008 |
| 7405859 | Method and apparatus for selecting wavelength A wavelength selecting apparatus includes a wavelength selecting filter and that a monitoring filter are similar acousto-optic tunable filters; a light source that outputs light having a specific wavelength to the monitoring filter; a light receiving unit that detec... | 07/29/2008 |
| 7405858 | Acousto-optic tunable filter control apparatus automatically adjusting frequency and power of radio frequency signal An AOTF control apparatus, which applies an RF signal to an AOTF to allow a selected light to pass through the AOTF, includes: a first calculating unit calculating a relationship between a frequency of the RF signal and a wavelength of the selected light based on a ... | 07/29/2008 |
| 7391976 | Optical acoustoelectric transducer An optical acoustoelectric transducer having a directivity pattern like a better 8 by receiving by a light-receiving element a reflected fraction of the light from a light-emitting device disposed at the center of a bottom plate that is parallel to a diaphrag... | 06/24/2008 |
| 7385749 | Silicon acousto-optic modulator An acousto-optic modulator includes a (100), (010) or (001) single crystal silicon acousto-optic interaction medium, and at least one transducer for emitting an acoustic wave attached to the single crystal. The transducer has a first electrode layer disposed on one ... | 06/10/2008 |
| 7372612 | High performance compact external cavity laser (ECL) for telecomm applications An optical tunable laser design (100) for the optic telecommunication industry is disclosed in this invention. This new design is economical, reliable, robust and with superior optical performances. The design offers broadband tunability, high output power, n... | 05/13/2008 |
| 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 |
| 7349632 | Method of wavelength selection control and wavelength variable filter device A method of wavelength selection control is disclosed. The method includes detecting reference RF frequencies by varying the frequency of a RF signal supplied to a reference acousto-optic tunable filter with the reference RF frequencies corresponding to reference wa... | 03/25/2008 |
| 7348108 | Design and layout of phase shifting photolithographic masks A method for defining a full phase layout for defining a layer of material in an integrated circuit is described. The method can be used to define, arrange, and refine phase shifters to substantially define the layer using phase shifting. Through the process, comput... | 03/25/2008 |
| 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 |
| 7343056 | Acoustooptic filter An acoustooptic filter 1 having an optical waveguide 3 disposed on an upper surface 2a of an acoustooptic substrate 2, an interdigital electrode 4 which excites a surface wave disposed on the acoustooptic substrate 2,... | 03/11/2008 |
| 7339521 | Analytical instruments using a pseudorandom array of sources, such as a micro-machined mass spectrometer or monochromator Novel methods and structures are disclosed herein which employ pseudorandom sequences to spatially arrange multiple sources in a pseudorandom source array. The pseudorandom source array can replace the single source in analytical instruments relying on spatial separ... | 03/04/2008 |
| 7327896 | Testing apparatus and method for a spectral imaging system A hyperspectral imaging system is tested in the lab to allow a determination of its response to the emission from a simulated target, of certain wavelengths of radiation which the imaging system will be using during target determination. A broadband IR wavelength ge... | 02/05/2008 |
| 7324265 | Tuning a narrow band filter for telecommunication applications with an acoustic optical tunable filter An optical tunable filter that includes an tunable acousto-opto deflector (AOD) for deflecting a broad band beam to an expander for projecting the broad band beam to a set of grating for generated a tuned output beam corresponding to a deflection from the AOD and a ... | 01/29/2008 |
| 7302121 | Optical device and drive voltage supply device The present invention is directed toward an optical device and a drive voltage supply device, which prevent occurrence of a DC drift and enable stable selection of light of desired wavelength without deteriorating a filtering characteristic. The optical device compr... | 11/27/2007 |
| 7295739 | Coherent DUV illumination for semiconductor wafer inspection An apparatus for inspecting a specimen, such as a semiconductor wafer, is provided. The apparatus comprises a laser energy source, such as a deep ultraviolet (DUV) energy source and an optical fiber arrangement. The optical fiber arrangement comprises a core surroun... | 11/13/2007 |
| 7293463 | Acoustoelectric conversion device In an acoustoelectric converter element, a light wave from a light source is introduced into a first optical waveguide of a vibration substrate, and diffracted by a diffraction grating disposed on the first optical waveguide. The diffracted light is directed to and ... | 11/13/2007 |
| 7286764 | Reconfigurable modulator-based optical add-and-drop multiplexer An optical add and drop multiplexer system comprising a first module for providing a first signal; a second module for providing a second signal; and a modulator for receiving a channel of the first signal at a first location, the first location configured to actuat... | 10/23/2007 |
| 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 |
| 7281226 | Incrementally resolved phase-shift conflicts in layouts for phase-shifted features Phase shifting allows generating very narrow features in a printed features layer. Thus, forming a fabrication layout for a physical design layout having critical features typically includes providing a layout for shifters. Specifically, pairs of shifters can be pla... | 10/09/2007 |
| 7245792 | Silicon-based tunable single passband optical filter A tunable optical filter includes a tunable Fabry-Perot (FP) filter, two tunable waveguide Bragg gratings (WBGs) and a 2×2 3-dB coupler. In one embodiment, the WBGs are implemented in a silicon substrate using polysilicon filled trenches. The FP filter is implement... | 07/17/2007 |
| 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 |
| 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 |
| 7236916 | Structure and method of correcting proximity effects in a tri-tone attenuated phase-shifting mask A structure and method are provided for correcting the optical proximity effects on a tri-tone attenuated phase-shifting mask. An attenuated rim, formed by an opaque region and an attenuated phase-shifting region, can be kept at a predetermined width across the mask... | 06/26/2007 |
| 7228012 | On-fiber microwave modulator and high speed switch for telecommunication applications Application of a communication signal, RF (radio frequency) or microwave signal to a modified optical fiber for modulating or switching-off the optical signal propagating within the optical fiber. The passive cladding material of an ordinary optical fiber is removed... | 06/05/2007 |
