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Electronic measurement system
Clinical thermometer with thermo-couple probe
Thermometer using a thermo-sensitive element
Opposed button thrust surfaces for earth boring bits
Liquid crystal display device with light shield of specific transmittance
Liquid crystal variable color density lens and eye protective devices incorporating the same
Apparatus and method for color transformation
Method and apparatus for sealing liquid crystal display element cell
Arrangement of .lambda./2 retardation plate in projector
Method of recording images
High contrast back lit liquid crystal display system
Display device having an improvement in insulating between conductors connected to electronic components
Zoom lens having small distortion
Zoom lens system
Finite distance zoom lens system
Liquid crystal display including pixel electrode (S) designed to improve viewing characteristics
Multi-domain liquid crystal display device
Telephoto zoom lens
Camera with a holographic indicator
Mark indicating device for optical apparatus
Display element
Thermochromic liquid crystal displays
Biorhythm indicator
Method and apparatus for automatic generation of phase-adapted coherent secondary radiation in a non-linear crystal
Optical modulation device
Apparatus for limiting the output signal frequency band of an optical sensor
Liquid crystal display panel and a process for the production thereof
Monolithic optical waveguide filters based on Fourier expansion
Split-beam Fourier filter
Programmable wavelength router
Color selective light modulators employing birefringent stacks
Liquid crystal devices using a linear electro-optic effect
Optical equalizer
Distributed resonant ring fiber filter
Method and apparatus for reducing optical cross talk in a liquid crystal optical switch
Method of and an apparatus for projecting a scanned two- or three-dimensional modulated light pattern originating from a light source
ECB type liquid crystal display device having birefringent layer with equal refractive indexes in the thickness and plane directions
Agile beam laser
Jinc-trap resonator
Scanning laser for a scanning laser radar
Visual display device with memory and telephone exchange incorporating such a device
CRT Display device
Electro-mechanical package of visual display and related circuitry
Method for manufacturing a liquid crystal display device with thin-film-transistors
Liquid crystal display having patterned insulating and semiconductor layers and a method of fabricating the same
Active matrix liquid crystal panel having an active layer and an intervening layer formed of a common semiconductor film
Semiconductor device
Compound semiconductor light emitting device and method of fabricating the same
Exposure control system
Program-controlled shutter
Light totalizing system for photographic camera provided with a shutter-diaphragm
Multi-item input/output device to input information to and retrieve other information from a terminal computer
Failure detection circuit for impact printers or the like
Multipurpose liquid crystal display having means for removably positioning the retroreflector
Amplification with chalcogenide glass fiber
Color filter
Liquid crystal display device
Warning display circuit of the electric shutter for camera
TV receiver for digital/analog combined use
Headwear with eye protector
Photographic apparatus having a reflex optical system
Image processing equipment with light source synchronized to blanking interval of video camera
Liquid crystal display element
Image forming apparatus provided with image eraser
Image formation apparatus and image formation method
Imaging forming apparatus
Image recording apparatus in which a plurality of images of different colors are printed in registration
Coding device, coding method, program and recording medium
Image magnifying and pick-up system with lighting light-guide device
Unbalance vector display device and process
Method for addressing X-Y matrix display cells
Method for making polystalline silicon thin film
Optical cable introducing structure and method of introducing and connecting an optical cable
Liquid-crystal display device
Scanning prism
Galvanometer-type tilting-mirror scanning system and circuit therefor
Optical recording medium recording pixel data as a compressed unit data block
Image processing apparatus including selecting function for displayed colors
Raman fiber optic probe assembly for use in hostile environments
Scanning system
Liquid crystal apparatus having light quantity of the backlight in synchronism with writing signals
Fluorescent backlight flicker control in an LCD display
Light adjusting sheet for a planar lighting device and a planar lighting device and a liquid crystal display using the sheet
Near video-on-demand signal receiver
Detection of content display observers with prevention of unauthorized access to identification signal
Color eliminating circuit
Video recording apparatus with color killer
Single channel method and apparatus for automatically optimizing insert editing in a signal recorder
Tape recording method and apparatus
Signal recorder with deferred recording
Summary frames in video
Apparatus and method for controlling the recording of television programs
Digital broadcast receiver outputting video and program information
Device and method for displaying broadcast program guide in a programmed recording system
Reproducing method and apparatus
Thermo-optique smectic liquid-crystal storage display
Liquid crystal display cell, process for its production and cell plate
Device for eliminating ringing in filtered ECG signals
Video processing circuit
Process for the preparation of a container closed under sterile conditions and containing lyophilized material
Mount for imaging lens array on optical print head
Optical absorbance meter
Single lens, multi-beam system and method for high resolution recording of information on a moving recording medium and article
Device for processing optical data with improved optical allignment means
Liquid crystal display cell having a diffusely-reflective counter electrode
Gain reflector-liquid crystal display
Reflective-type liquid crystal display device with etched oxide layer between substrate and metal film and method for producing same
Optical recording/reproducing head access controlling apparatus for an optical type information recording/reproducing apparatus
Environmentally sensitive compositions of matter based on 3H-fluoren-3-ylidenes and process for making same
Providing data to applications from an access system
Light modulating apparatus
Luminance/chrominance separating apparatus having a spatial filtering effect
Circuit for removing jitter of chrominance signal and television set using the same
Remote tracking control system for a video cassette tape recorder
Germanium silicon oxynitride high index films for planar waveguides
Counteracting geometric distortions for DCT based watermarking
Robust digital watermarking
Method and apparatus for recording manufacturer information on a recording medium and for determining whether the manufacturer information is effective
Video adapter circuit for detection of analog video scanning formats
Electronic watthour meter
Digital video window control
Magnetic disc recording and/or reproducing apparatus
Recording and/or reproducing apparatus, particularly with means for searching for vacant tracks
Receiving apparatus including a display for displaying the amount of unrecorded memory
Display control method for display having buttons representing selectable voting items in which only marks assigned to selected items continue to be displayed upon selection
3D virtual reality multi-user interaction with superimposed positional information display for each user
Video signal selecting device
Optical modulation element having two-dimensional phase type diffraction grating
Method of operating a liquid crystal light valve
Method and apparatus for constructing, storing and displaying characters
Bi-directional bus system and transmitting, receiving, and communication methods for same
Method and apparatus for providing dual language captioning of a television program
Methods and apparatus for concurrently acquiring video data from multiple video data sources
Compressed data recording method using integral logical block size and physical block size ratios
Apparatus and method for extracting a portion of an image
Chrominance signal reproducing apparatus for video tape recorder
Exposure display device for a single lens reflex camera
Exposure and flash fire control system
Video signal recording and reproducing apparatus a frequency down-cinverted luminance signal into the vertical retrace line interval of a recording signal
System for colorizing video with both pseudo-colors and selected colors
Liquid crystal lenses having a Fresnel lens
Recording method of still video apparatus
Apparatus for detecting a cut in a video
Optical component containing a maximum of 200 wt.-ppm of chlorine
Television signal reception apparatus and method, and broadcast reception apparatus and method
Side chain liquid crystalline polymeric media exhibiting third order nonlinear optical response
Acrylic copolymers exhibiting nonlinear optical response
Perfluoroalkyl group-containing copolymers
Video recording and reproducing apparatus with crosstalk reduction
Process for thermoremanent duplication of magnetic recording master tape onto slave tape with reduced dimensional changes of slave tape
Password that associates screen position information with sequentially entered characters
Compact disk and high-speed search method thereof and recording method appropriate therefor
Apparatus for indicating overcorrections, in electrical color correction apparatus
Lightpen control circuit
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST*** *** NO IMAGES AVAILABLE***
Emulation attribute mapping for a color video display
Generation of hard copy color photo reproductions from digitally created internegative
Modular rod lens assembly and method of making the same
Multidirectional viewing borescope
Edit decision list for identifying the pull down phase of a video signal
Can decorating apparatus
Method of mechanical surface treatment of a blank metal sheet
Resealable flip-top can
Tamper evident and counterfeit resisting informational article and associated method
Techniques for transferring holograms into metal surfaces
Nanopastes for use as patterning compositions
Photographing data indicator for a single lens reflex camera
Waste toner container detector
Method and apparatus for the selection of data for use in VTR trick playback operation in a system using intra-coded video frames
Replay bit stream searching
Electronic component packaging means, and supply mechanism for and method of supplying electronic components by using the electronic component packaging means
Optical storage medium, optical storage method, optical reading method, optical reading apparatus, optical retrieving method and optical retrieving apparatus
Object detecting apparatus having case breakage detecting function
Optical recording film and process for production thereof
Automatic inspection system for detecting foreign matter
Chroma signal phase correction circuitry to be used in a color video information playback system
Tunable directional optical waveguide couplers
Optical switch
Optical switch
Method of access to recording medium, and apparatus and method for processing information
Recording and reading space control between a read/write probe and a recording medium
Optical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus therefor
Information recording apparatus and process for recording on a recording medium with pit edges shifted in a step-wise fashion
Disc player for playing different types of discs which automatically identifies the type of a currently loaded disc
Method of recording and reproducing video format signal using division video signals on a plurality of recording media
Method of digitally compressed video and audio data
Adapter and adapter system for playback of a compact disc and a mini disc in an optical disc apparatus
ECL in a recording and reproduction device in which coefficient groups including coefficient data corresponding to low frequency components of the first axis in at least two overlapped coding blocks are not recorded by the same recording head
Light control film with reduced ghost images
Rear projection screen with light diffusion sheet and projector using same
Reference beam deflecting element for recording a hologram
Optical filter employing holographic optical elements and image generating system incorporating the optical filter
Video recording and reproducing device and method including video signal record restart during rewind/playback operation after non-detection of pilot signal in video track
Method and apparatus for reducing noise in a video signal
Semiconductor delay line driven by an input signal-derived reference signal
Phase shift multifocal zone plate
Multifocal objective
Objective lens system
Diffractive multifocal optical device
Grating lens and focusing grating coupler
Powerless field-corrective lens
Error detecting device for optical head
Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses
High resolution imagery systems and methods
Compound objective lens having two focal points
Superresolution scanning optical device
Method and apparatus for storage and retrieval with multilayer optical disks
Optical head
Light beam shaping device to change an anisotropic beam to an isotropic beam for reducing the size of an optical head
Method of using a single pick-up head to read and store data on discs of different thicknesses and structure of a pick-up head apparatus therefor
Optical head and optical data recording and reproducing apparatus having the same
Device for optically scanning a recording medium by focusing the best focus or the paraxial focus to the information layer
Objective lens for recording and reproducing for use in an optical information recording medium
Optical pickup used with both DVD and CD
Correction elements to lower light intensity around an optical axis of an optical head with a plurality of focal points
Objective lens for optical pick-up head of optical disk drive
Optical head
Compound objective lens having two focal points
Optical pickup device for reproducing discs of two types with different densities by double beam focuses of different sizes
Multiple focus lens, an optical head apparatus and an optical information recording-reproducing apparatus
Polarizing plate and liquid-crystal display containing the same
Method of recording and reproducing color video signals
Recording apparatus
Recording/reproducing apparatus and information medium transfer method
Polarization independent wavelength tunable filter based on birefringence compensation
Wavelength division multiplexer and demultiplexer
Tunable filtering device for optical communications
Wavelength selection switches for optical application
All-optical holographic code division multiple access switch
Method for producing copy protected recorded videotape having uncopyable vertical synchronizing signal partition
Image recording/reproducing apparatus
Three-dimensional image display device having an elementary hologram panel and method for manufacturing the elementary hologram panel
Method and apparatus for displaying three-dimensional images
Lens array and method of making same
Optical signal processor, method of its control, method of its designing, and method of its production
Method and system for equalizing PMD using incremental delay switching
Polarization scrambler and integrated optical circuit making use thereof
Fiber optic circulator
Method and apparatus for providing transformation of the polarization of light
Polarization mode dispersion compensation
Method for compensating polarization mode dispersion in a waveguide and a polarization mode dispersion compensator
Electro luminescence device and electrophotographic printing system using the same
Film confined to a frame having relative anisotropic expansion characteristics
Method for formatting partially overlapping holograms
Multiplexed multi-image source display writing system
Chrominance encoding for a widescreen television system
Auxiliary signal to assist conversion of a letterbox standard aspect ratio television signal to a wide aspect ratio signal
TV signal decoding apparatus using luminance and color signal selection
Low cost high efficiency power converter
Television camera arrangement in which electrically generated data is superimposed on the video picture information
Multi-channel video switch using dual-gate MOS-FETS
Apparatus for recording optical information
Electrochromic light regulator
Electromagnetically driven shutter
Device and method of fabricating color conversion table and medium recording program for forming color conversion table
Television generator for highlighting portions of an image
Holograms for security markings
Holographic display element and method of making the same
Chrominance signal processing circuit in color television receiver
Multiple-resolution scanning device
Optical signal free-space conversion board
Polyhedral integrated and free space optical interconnection
Component for optical data transmission
Image processing apparatus
Method of and apparatus for producing hard copy of color picture adaptive to variations in characteristics of fluorescent screen of recorder CRT
Image recording apparatus
Process and recording media for continuous wave four-level, two-photon holography
Process for the preparation of aryldimethyl(3-aryl-propyl)silanes
Optical information storage on a bacteriorhodopsin - containing film
Method and system for maintaining and controlling the signal-to-noise ratio of hologams recorded in ferroelectric photorefractive materials
Asymmetrical dyes with large two-photon absorption cross-sections
Two-photon upconverting dyes and applications
Two-photon or higher-order absorbing optical materials and methods of use
Signalling system
Method and apparatus for recording one-step, full-color, full-parallax, holographic stereograms
FM demodulator having a frequency independent delay circuit
Apparatus for recording and reproducing a video signal
Circuit arrangement for the equalization of digital signals received in analog form
Fixed solar concentrator-collector-satelite receiver and co-generator
Double hologram
Data recording apparatus
Digital transmission signal processing system and recording/reproducing system
Video signal processing apparatus
Continuous looping feature in transmission of HDTV signals
Chemical analysis apparatus
Decorative article
Method for producing picture element groups by means of laser rays in space and on a plane
Functional devices comprising a charge transfer complex layer
Method of fabricating an electrolytic cell employing a solid polymer electrolyte
Image input device
System and method for steering focal plane data using cylindrical coordinates to access data locations in a holographic memory
Scanning module
Illumination device and method for laser projector
Method and system for first-order RF amplitude and bias control of a modulator
Air filter material
Wavelength allocation in a ring
Ruggedized high-volume enviromentally-friendly electrophoretic cell
Tape data carrier, method and device for manufacturing the same
Method and apparatus for capacity-efficient restoration in an optical communication system
Single wall domain latrix for optical data processing system
Microstructure-bearing articles of high refractive index
Apparatus for recording and/or reproducing color video signals
Multi-scene recording medium having data units of program information items recorded alternatingly and continuously thereon, and apparatus for reproducing data therefrom
Method and system for producing personal golf lesson video
Video information editing method and system, and recording medium having the editing method stored
Line light source including fluorescent colorant
Waveguide security device
Ink jet recording paper
Random phase plate for holography and process for manufacturing same
Transfer lamination of vapor deposited foils, method and product
Method for applying an embossing foil to a flexible material
Method of manufacture of foil material and the foil material made thereby
Method for forming an image comprising adherence of the image-receiving and image-forming material
Process for preparing blazed holograms
Embossing foil
Plastic molding of articles including a hologram or other microstructure
Pre-imaged high resolution hot stamp transfer foil, article and method
Holographic document and method for forming
Tamper evident and counterfeit resisting informational article and associated method
Embossed-in-register manufacturing process
Method for generating a hologram on a disc surface
Adhesive coated thin film label
System and apparatus for the recording and projection of images in substantially 3-dimensional format
Display device for both hardcopy and digital images
Method for effecting illumination of an arbitrary aperture
Image recording medium and method of making same
Holographic display overlay
Optical disc readout apparatus for different types of optical discs
Optical pickup using an optical phase plate
Optical pickup using an optical phase plate
Optical pickup using an optical phase plate
Light diffusion sheet and backlight unit using the same
Log time processing and stitching system
Marking a video and/or audio signal
Video tape or cassette recorder
Method and apparatus for creating a white-light interference hologram from PC input photographic data
Device-independent and medium-independent color matching between an input device and an output device
Rotatable sheet feed scanner and method for using the same
Stereoscopic image information transmission system
Network facsimile apparatus
Method for making hologram ornamental sticker
Method for forming spatially-varying distributed Bragg reflectors in optical media
Cascaded self-induced holography
Writing Bragg gratings in optical waveguides
Optical logic device and optical memory device
Non-aqueous electrolyte cell
High definition television receiver enabling picture-in picture display
Apparatus for receiving wide/standard picture plane television signal
Wide screen television
Incandescent light with parallel grooves encompassing a bulbous portion
Cable grid spectral lighting system
LTG AlGaAs non-linear optical material and devices fabricated therefrom
Method and apparatus for optical data storage using non-linear heating by excited state absorption for the alteration of pre-formatted holographic gratings
Encrypted holographic data storage based on orthogonal phase code multiplexing
Light diffusion control by electrically reconfigurable holographic optical elements
Image display apparatus
Color display device in which the area of a spherical lens equals the area of a set of RGB sub-pixels
Non-volatile holographic storage in doubly-doped photorefractive material
Stereo image forming apparatus
Card reading system
Optical pattern recognition system and method for verifying the authenticity of a person, product or thing
Dual card smart card reader
Liquid crystal display
Polymer dispersion type liquid crystal display element and reflection type liquid crystal display device
Reflective image-providing display viewed with holographically diffused ambient light
Self calibrating scanner with single or multiple detector arrays and single or multiple optical systems
Holographic verification system with indexed memory
Manufacture of security tapes and security threads
Hydraulic transfer method and device and hydraulic-transfer article
Three-LCD projector having specified scanning directions
Use of fresnel zone plates for material processing
Ambient turn-on suppression hologram
Method and apparatus for recording and reproducing a video-disc with an oscillated track
Electronic timepiece having a stepping motor and driving circuit compensated for power source variations
Method of producing switchable holograms
Suture clip with reduced hinge mass
Switchable lens/diffuser
Method for making an optical device using a laser beam interference pattern
Optics arrangements including light source arrangements for an active matrix liquid crystal image generator
VLSI visual display
Apparatus for displaying image recognized by observer as stereoscopic image, and image pick-up apparatus
Display device having diffraction grating
Virtual retinal display
Bi-directional optical transmission system
Automotive holographic signal lamp
Method and means for reducing undesirable effects of dirt particles on a flexible record device
Hologram and method of and apparatus for producing the same
Reflectors for photolithographic projection and related systems and methods
Image reading apparatus
Beam scanning system adopting deflection disc
Carrier film and process for producing the same
High-efficiency polarized light source
System for the display of images given by a spatial modulator with transfer of energy
Fiber optic diffraction grating maker
Head up display unit, liquid crystal display panel, and method of fabricating the liquid crystal display panel
Method and apparatus for maximizing the visual quality of image presented in electric form
Encoded security document
Side alignment mark
Optical transmission and receiving module
Calibration method for spectroscopic systems
Holographic puzzle
Art form and method of producing same
Segmented hologram for multi-image display
Heads-up and heads-down displays employing holographic stereograms
Seam structure of rubber sheets
Holographic method and apparatus using incoherent light
Method and apparatus for obtaining modulated light indicative of an image operationally formed by projecting an inputted image on the flat plate of an optical induction reflective index crystal
Method for making a holographic mirror
Two-step gated holographic recording in photorefractive materials using cw lasers
Masking of elongate three dimensional objects for the exposure of preselected areas for surface treatment
Method of preparing a photo-mask for imaging three-dimensional objects
Heat-bonding method
Process for selective transfer of metallic foils to xerographic images
Composite for reinforcing bituminous roofing membranes including a lightweight grid of over-under construction
Diffractive beam homogenizer having free-form fringes
Fabrication of sandwiched construction media
Hologram recording sheet, holographic optical element using said sheet, and its production process
Process for holography involving tilt compensation
Optical scanning apparatus
Programmable optical interconnect system
Method of reading hologram information
Vacuum diaphragm device
Achromatic optical system including diffractive optical element
Color reproducing method and apparatus for converting a color space data into another color space data
Image transfer sheet and image forming method using the image transfer sheet
Method and apparatus for color conversion
Holographic system for the storage of audio, video and computer data
Printed circuit board
Optical storage media with discontinuous thin metallic films
Method of manufacturing high efficiency, broad bandwidth, volume holographic elements and solar concentrators for use therewith
Polymer dispersed liquid crystal panel with diffraction grating
Three-dimensional image display device
Optically active diffractive device
Matrix-type display device
Method of detecting and adjusting exposure conditions of charged particle exposure system
Veiling glare control holographic windshield
System and method of forming structural assemblies with 3-D woven joint pre-forms
Composition containing polymerizable entities having oxirane groups and terminal olefinic unsaturation in combination with free-radical and cationic photopolymerizations means
Viewer/projector for display of 360 degree holographic film cassettes
Method of preparing volume type hologram film
Ribbed gasket for miniature galvanic cell
Manufacturing method for a hologram and a related exposure apparatus
Testing and inspecting lens by holographic means
Method for writing holograms
Information display system having transparent holographic optical element
Error control system and method
Illumination system for transmissive light valve displays
NTSC interference rejection filter
Magnification-variable optical scanner
Method of extending the field of view in a head-up display
Holographic head-up display
Non-regular reflection type holographic mirror and method of producing the same in a reflection type display apparatus for vehicle
Simulated stained-glass article and method of making the same
Color printed record and method
Sign with transparent substrate
Fluororesin-coated material having markings indicated thereon
Optical head in a device for recording and reading a data carrier
Combiner for optical or electro-optical systems
Separation type optical head
Optical data storage tracking system
Color tuned holographic optical elements and methods of making and using the elements
Multidirectional optical scanner
Scanning device for symbol codes
Scanning device
Helical scanning pattern generator
Ultra compact scanning system for a wide range of speeds, angles and field depth
Method of adhering holograms to textile wearing apparel
Demodulation technique for coherence multiplexed optical data transmission system
Optical information processor
Optical telecommunications system employing multiple phase-compensated optical signals
Interferometric switch
Color image generation systems and applications
DMD illumination coupler
Holographic display with switchable aspect ratio
Scanner with non-linearity compensating pixel clock
Method of manufacturing a photomask comprising a phase shifter with a stepped edge
Method for determining rheumatoid factors and agents for carrying out the method
Reverse light blocking hologram for a center high mounted stoplight
Production of holograms
Silver halide photographic material
Methods and apparatus for making holograms
Wide image scanner
Holographic optical element for optical disk pickup head
Scanning of images
Fax machine with retractable drawer
Transmissive holographic optical element on aberrating substrate
Image processing apparatus and image processing method for reproducing a color image from color signals having different phases
Method of preparing a hologram using readily available light sources
Resin coated carriers for electrostatic image development and the method of preparing the same
Holographic recording material and process for producing holograms
Storage stable photopolymerizable composition and element for refractive index imaging
Optoelectronic devices
Photorefractive device and process for its use
Photoreceptor for electrophotography with low free chlorine content polycarbonate resin in organic photoconductive layer
Device for the folding of the optical paths of two right-hand and left-hand image projectors of a binocular helmet visor with projection on visor
Solar concentrating lens and receiver
Temperature-controlled accelerated weathering device
Process for improving adhesion of polysiloxane coatings to polymeric substrates via reduced alkali metal cation content
Refractive spectrum splitting photovoltaic concentrator system
System for collimating and concentrating direct and diffused radiation
Intermittent transmission apparatus
System for controlling activation of air bag for vehicle
Document gap detecting device for use in facsimile
Fiber identification in an optical fiber composite overhead ground wire
Projection display apparatus using color temperature correctors and liquid crystal shutters
Projection televisions with three dimensional holographic screens
Method and device for determining cornea surface topography
System and method to program a printing form
Masks with low stress multilayer films and a process for controlling the stress of multilayer films
Apparatus for correcting scanning position in optical scanner
Agitator hub
Sensitive yeast genetic system for identifying agents causing double-stranded DNA damage
Head-up display
Optical wave network system and method of monitoring a network trouble
Developer solution for positive-working resist composition
Color expressing method and image processing apparatus thereof
Real-time analog creation of holographic fourier transform matched filters
Method of disconnecting short-circuited part between upper and lower electrodes of liquid crystal display panel, and process of preparing liquid crystal display panel by using the same
Illuminating system for the visual inspection of objects
Hybrid diffractive optical filter
High-efficiency, multilevel, diffractive optical elements
Weighted-sum processing method and apparatus for decoding optical signals
Optical instrument for measuring displacement
Diffraction encoded position measuring apparatus
Simulated objects
Telecommunications system for transmitting images
Optical waveguide device with phase matching layers
Optical arrangement having a concave mirror or concave grating
Cassette having an information disc