Class 359/314 - Particular cell orientation

Subclass of Class 359 - Optical: systems and elements
Definition: Subject matter wherein a specific location of the modulator
No. of patents: 30
Last issue date: 10/16/2007

Number	Title	Issue Date
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
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
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
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
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
6295079	Scanning optical unit A scanning optical unit is provided which can prevent flare reflection of a laser beam at an end portion of a reflecting mirror which is provided outside an exposure region and which is for detecting a time of starting of exposure by the laser beam. In th...	09/25/2001
6057957	Optoacoustic modulator An optoacoustic modulator contains first and second optoacoustic media, to which first and second piezoelectric vibrators are attached respectively. Herein, both of the first and second optoacoustic media are designed in same measurements, wherein they ar...	05/02/2000
5973822	Acousto-optic tunable filter and method of calculating its equivalence incident angle In a non-collinear type acousto-optic tunable filter, the incident angle of a source light beam L1 radiated from a light source 6 onto an acoustic medium 1 is set at an equivalence incident angle for which the wavelength λi of the d...	10/26/1999
5963569	Multiple channel acousto-optic modulators A multichannel acousto-optic modulator (MCAOM) is described which uses a crystal with a plurality of mounting faces for acoustic transducers. The mounting faces are oriented so that the acoustic transducers mounted thereon generate acoustic fields which i...	10/05/1999
5907428	Acousto-optic element light deflector light beam scanning apparatus and image recording apparatus An xyz coordinate system is determined so that a z-axis may coincide with an incident direction of an incident light, an x-axis may coincide with a polarizing direction of the incident light and a y-axis may be defined as the right-handed system from the ...	05/25/1999
5796512	Subicron imaging system having an acousto-optic tunable filter An imaging system comprises an acousto-optic tunable filter for receiving light at an input end thereof and outputting light at an output end thereof. A control circuit is provided for tuning the filter. A prism is responsive to the light output by the tu...	08/18/1998
5652673	Elimination of modulated interference effects in photoelastic modulators Modulated interference effects arising when laser beams are modulated by photoelastic modulators are substantially eliminated by methods and apparatus that extract from the detected beam the modulated, interfering light that emanates from the optical elem...	07/29/1997
5537242	Liquid crystal millimeter wave open transmission lines modulators Low-cost, thin-layer liquid crystal (LC) millimeter wave (MMW) phase modulators and phased array antennae are provided based on several types of open transmission strip-line, parallel-line, and ridge-guide configurations in which surface-aligned LCs are m...	07/16/1996
5517349	Process and a device for error correction in acousto-optic deflection of light beams, particularly of laser light A process and a device for compensating wave-front errors occurring in acousto-optical deflectors, with at least one auxiliary deflector which produces a deflected beam whose geometry is independent of the deflection angle and which counteracts the depend...	05/14/1996
5329397	Acousto-optic tunable filter An electronically tunable optical filter utilizing noncollinear acousto-optic interaction in an acoustically anisotropic, optically birefringent crystal. The directions of optical and acoustic waves are chosen so that the optical ray is collinear with the...	07/12/1994
5247388	Continuously variable delay lines An acousto-optic apparatus is described that varies the time delay of electrical signals over a continuum of delays. In the preferred embodiment, a light source, which can be either coherent or incoherent, emits an optical beam that is focused into an aco...	09/21/1993
5220163	Microwave adaptive transversal filter employing variable photonic delay lines By applying a spatial frequency dependent phase compensation in an optical heterodyning system, a variable rf delay line can be synthesized. The system is able to generate continuously variable phased microwave signals over a prescribed frequency band. A ...	06/15/1993
5122898	Acousto-optical deflector An acousto-optical deflector disclosed, comprising, two crystals and two piezoelectric transducers associated respectively with the crystals and controlled by a variable frequency RF signal for generating, in the crystals, ultrasonic waves of the same fre...	06/16/1992
4637688	Acousto-optic diffraction and signal mixing device An acousto-optic diffraction and signal mixing device. A laser light beam is expanded and shaped into a sheet beam which is directed across the surface of an acousto-optic medium. Four acoustic transducers are disposed on the acousto-optic medium, two at ...	01/20/1987
4602852	Acousto-optic deflector systems An acousto-optic deflector system including first and second transducers for producing acoustic waves for interaction with an optic beam in an acousto-optic device. The transducers are driven by signals of differing frequencies (f1 +Ɗf, f...	07/29/1986
4582397	Diospersive acousto-optic filter An electronically tunable optical filter using acousto-optic interaction in a dispersive birefrigent crystal. The strong wavelength dispersion of birefringence in a class of uniaxial semiconductors near the band gap is utilized to enhance the spectral res...	04/15/1986
4536062	Thermal stabilization for an acousto-optic device An acousto-optic device is shown which permits the use of a temperature sensitive solid state laser. The laser is mounted in a heat sink that displaces the laser as a function of temperature in a direction which cancels the drift of the laser's blur spot ...	08/20/1985
4530573	Optoelectronic multiposition RF signal switch A laser is modulated in accordance with an input signal of time varying value. The modulated beam is intercepted by a Bragg cell acoustically modulated in accordance with one or more preselected control frequencies from a selectable source of such frequen...	07/23/1985
4456338	Electronically tuneable light source An electronically tuneable light source which includes a source of white light, an acousto-optic modulator which includes a transparent medium and a means for generating an acoustical wave in the medium and a means for directing the collimated beam of the...	06/26/1984
4390247	Continuously variable delay line Coherent light is incident upon an acousto-optical cell through which bulk acoustic waves are propagating. These acoustic waves correspond to a signal to be delayed and result from the application of the signal to a piezoelectric transducer of the cell. T...	06/28/1983
4339821	Acousto-optic mode-locked laser An acousto-optic mode-locked laser comprises a piezo-electric, acousto-optic crystal disposed within the cavity of a laser in the path of the laser beam, and a radio-frequency energized interdigital transducer (IDT) array coupled to the crystal so as to l...	07/13/1982
4052121	Noncollinear tunable acousto-optic filter An electronically tunable optical filter is described wherein an optical beam is diffracted by an acoustic beam the group velocity of which is noncollinear with the optical beam transmitted through the birefringent crystal medium. The frequency and the di...	10/04/1977
4037933	Light deflector of acousto-optic interaction type A light deflector utilizing the anisotropic Bragg diffraction in an anisotropic medium in which the directions of the wave front normal and the energy propagation of ultrasonic waves are arranged to be different and the frequency range of the ultrasonic w...	07/26/1977
4006967	Directing optical beam Methods and apparatus for directing a beam of optical radiation toward a selected location and modulating the intensity thereof at the location by directing the beam over a path that includes a Bragg grating, and selectively modifying the angle between th...	02/08/1977
3944334	Acousto-optic filter An acousto-optic filter utilizing the far-off-axis anisotropic Bragg diffraction comprising an optically anisotropic acousto-optic medium embodied by paratellurite. The light entrance surface is slanted to the crystalline axis to make a light beam inciden...	03/16/1976

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Class 359/314 - Particular cell orientation