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7446857 Image forming method and apparatus  
An acousto-optic cell is used in a method and device for patterning a workpiece, for exposing a radiation sensitive layer on a workpiece such as a mask or a device substrate. The acousto-optic cell...
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...
7397018 Amplitude and phase controlled adaptive optics system  
An adaptive optics system is provided. The system includes a light source, a pair of deformable mirrors and a detection module. The light source is configured to provide an outgoing beam. The...
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...
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...
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...
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...
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...
6775051 Systems and methods for scanning a beam of light across a specimen  
Systems and methods for scanning a beam of light over a specimen are provided. A system may include a pre-scan acousto-optical deflector (AOD) configured to deflect a beam of light, a second AOD...
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...
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...
6618183 Method and apparatus for modulating unpolarized light  
The method and apparatus for amplitude modulation of unpolarized light by at least one Bragg modulator on the basis of domain-invertible material, the unpolarized light is modulated by a first...
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...
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...
6016216 Polarization-independent acousto-optic tunable filter  
A polarization independent acousto-optic tunable filter (PIAOTF) used for multiwavelength switching and routing in wavelength division multiplexing (WDM) networks. In the PIAOTF an incident...
5886810 Mounting apparatus for an optical assembly of a photoelastic modulator  
An optical assembly comprising an optical element and a transducer is suspended within an enclosure so that the optical assembly is free to vibrate within the enclosure. In one embodiment, the...
5838484 Micromechanical optical modulator with linear operating characteristic  
A micromechanical optical modulator having a linear response in reflectivity, as a function of applied bias, and a method of operating and making same, are disclosed. The modulator consists of a...
5781327 Optically efficient high dynamic range electro-optic modulator  
An electro-optic modulator and a method for its use, in which an optical carrier is effectively suppressed for transmission of a radio-frequency (rf) modulating signal over an optical communication...
5633747 Variable spot-size scanning apparatus  
An apparatus for both deflecting a beam of light illuminating a spot on a surface and varying the size of the spot, electronically, without changing any system components. The apparatus includes an...
5412501 System for controlling spot power in a raster output scanner  
The present invention is a scanning system and a novel method for compensating for the variations in the output power of the beam from an A-O cell. The novel method involves varying the amount of...
5357097 Method and apparatus for controlling acousto-optic filter  
An apparatus for controlling an acousto-optic filter includes a high-frequency oscillator, a beam intensity detector, a first and a second oscillator, and a first and a second controller. The...
5309178 Laser marking apparatus including an acoustic modulator  
A laser marking apparatus includes at least one laser beam source, a multichannel acoustic modulator defining a plurality of at least partially overlapping modulation regions, apparatus for...
5251058 Multiple beam exposure control  
In a raster output scanner, a system for using one original beam and one facet of a rotating polygon to generate a scan line which can be turned on to have three levels of intensity. The original...
5251057 Multiple beam optical modulation system  
In a raster output scanner, a system for using one original beam and one facet of a rotating polygon to generate two consecutive scan lines. The original beam is first separated into two beams in a...
5249196 Internally folded scalable laser  
An internally folded scalable laser has a gain medium with an internal face nd an external face and at least one internal-fold face subtending an angle which may be about 90°. An output coupler...
5153771 Coherent light modulation and detector  
A acousto-optic Fabry-Perot optical modulator (10) has a crystalline body (12) having a first partially reflective electrode (14) for receiving radiation, including laser radiation having a...
5130843 Acousto-optical device using a superlattice as the interaction meduim  
This device comprises a photoelastic interaction medium between an incident light beam (28) and at least one acoustic or sound wave, as well as means (4, 6) for producing the acoustic or sound...
5122897 Optical beam modulating device  
An optical beam modulating device used for recording halftone plate duplicate images on a recording material including two multi-channel optical beam modulators, each including a rectangular...
5067798 Laser beam scanning system  
A laser beam scanning system is used as a laser probing apparatus. The apparatus includes an acousto-optic modulator provided on an optical path for intensity-modulating a laser beam in accordance...
H000822 Method of amplitude modulating a laser beam  
An acousto-optic tunable filter (AOTF), instead of being used for its intended use of frequency or wavelength tuning a laser from within its resonant cavity, is used outside the laser cavity to...
4695790 RF frequency spectrum analyzer subsystem  
A spectrum analyzer subsystem for analyzing the frequency content of an RF signal including an optical source means responsive to an RF signal for generating a plurality of intensity modulated...
4623219 Real-time high-resolution 3-D large-screen display using laser-activated liquid crystal light valves  
A number of viewers wearing polarized glasses are presented real-time, hiresolution, three-dimensional projected images on a distant screen at video image signal rates. Two laser raster scanners...
4614116 Phase sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features  
A phase-sensitive ultrasonic modulation method for the detection of strain-sensitive spectral features involves the use of an ultrasonic field with well-defined wavefronts and a light beam of spot...
4509829 Amplitude modulator for a high powered beam of infrared radiation  
A method and device for amplitude modulating a high powered beam of infrared radiation at frequencies in the megahertz range are disclosed. A laser is used to generate a beam of 4-40 watts of power...
4499437 Apparatus and method providing improved control of a laser beam  
The present invention provides method and apparatus for angularly deflecting and intensity modulating a laser beam. Specifically, an acousto-optic cell is driven by a signal that causes a laser...
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...
4422099 Optical communication on variable power beam  
An acousto-optic deflector may selectively deflect an applied light beam. The remaining undeflected zero-order beam varies considerably in power depending upon whether the beam is deflected. The...
4342502 Transverse tunable acousto-optic filter  
An electronically tunable optical filter utilizing noncollinear acousto-optic interaction in a birefringent crystal. The directions of optical and acoustic waves are chosen so that large angular...
4299449 Acoustooptic modulator  
An acoustooptic modulator is provided with an electroacoustic transducer which generates a non-uniform acoustic wave distribution. The distribution of the acoustic wave excitation varies along the...
4290672 Plural line acousto-optically modulated laser scanning system  
Unwanted interference effects arising in those high speed laser scanning systems, particularly those used in printing, employing an acousto-optical modulator for scanning with a plurality of...
4257685 Acousto-optic device  
A single crystal of pure or mixed univalent mercury halide, which is formed having a pair of opposed polished faces at least one of which is perpendicular to a direction which is inclined from the...
4232952 Acousto-optic device  
A single crystal of pure or mixed univalent mercury halide is formed having a first face perpendicular to the direction [A] which is inclined about the crystallographic direction [110] by an angle...
4217036 Acoustic-optic coherent modulator and detection system  
The intensity of light beams transmitted through a tunable acousto-optic modulator is controlled by modulating the center wavelength of the filter passband. Such wavelength modulation can be...
4201455 Laser-operated apparatus for data and signal recording  
A laser-operated apparatus for data and signaling recording makes use of a laser-beam source whose laser beam is directed at the Bragg angle into a tellurium dioxide monocrystal provided with an...
4164717 Acoustooptic modulation and deflection  
Acoustooptic apparatus for intensity modulating and angularly deflecting a beam of coherent light includes optical means for spreading the beam into a sheet having a cross-sectional shape with a...
4112461 Multiwavelength light beam deflection and modulation  
Apparatus and method are disclosed for diffracting light beams of different wavelengths to form a color image without achromatizing optics. An acoustic wave deflection frequency range is utilized...
4025165 Electro optical imaging device  
The present invention relates to an electro-optical imaging device containing as transducer a foil electret, having a transparent conducting backplate.
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...
3962688 Optical mass data memory  
An optical memory for storing large amounts of information with a great packing density having writing and reading cycles controlled by a computer. A laser beam provides writing and reading of...
3944948 Cascaded data modulation system  
A cascaded data modulation system for the transmission of amplitude and frequency modulation data with a bandwidth up to and greater than 500MHz. The system involves the multiple heterodyning of...
Matches 1 - 50 out of 80 1 2 >