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8081360 |
Light-collecting device, light-collecting device array, exposure device and image-forming apparatus
A light-collecting device is provided, a light-collecting device, including: a first volume hologram recorded in a hologram recording layer by interference of a first spherical wave and a planar...
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8073296 |
Optical device, and virtual image display device
A virtual image display device which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device includes an...
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8023783 |
Optical device, and virtual image display device
A virtual image display device is provided which displays a two-dimensional image for viewing a virtual image in a magnified form by a virtual optical system. The virtual image display device...
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7999983 |
Lens material, optical electronic component and optical electronic device
An optical material includes lithium tantalate, and a molar composition ratio of lithium oxide and tantalum oxide (Li2O/Ta2O5) in the lithium tantalate is in the range of 0.975 to 0.982. Since an...
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7988297 |
Non-rigidly coupled, overlapping, non-feedback, optical systems for spatial filtering of fourier transform optical patterns and image shape content characterization
Non-rigidly coupled, overlapping, non-feedback optical systems for spatial filtering of Fourier transform optical patterns and image shape characterization comprises a first optical subsystem that...
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7925096 |
Method and apparatus for validating holograms
A method and apparatus that validates a hologram by scanning the hologram at multiple angles is disclosed. The method may include scanning a document containing the hologram at a first angle to...
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7905407 |
Electro-optical lens mounting assembly and method in electro-optical readers
A lensholder holds at least one fixed optical lens and a variable focusing element in a spaced relation along an optical path through which light passes in an electro-optical reader. The variable...
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7880945 |
Hologram projection screen and its manufacturing method and system as well as its applications
A method for manufacturing a hologram projection screen includes the steps of: 1) recording hologram lens information on a photoresist plate; 2) metalizing the photoresist plate that has been...
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7839550 |
Volume holographic filter with broad acceptance angle and narrow spectral bandwidth
A narrowband filter with a wide acceptance angle which utilizes two holographic filter elements connected in series. The filter blocks light outside of a narrow spectral band of interest, while...
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7817909 |
Optical device and light source
An optical device directs light from a light source to a region of space, such as the field of view of a camera when the optical device is used as a camera flash unit. This device includes a first...
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7772988 |
LED light assembly with predetermined distribution pattern and built-in retroreflector
An apparatus and method for producing specified output intensity distribution requirements from a single LED source, wherein the apparatus includes a single LED source and a cover, including a...
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RE41455 |
Objective lens for optical disks having different thicknesses
A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the...
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7764413 |
General diffractive optics method for expanding an exit pupil
An exit pupil extender with one input optical element and two exit optical elements disposed on different sides of the input optical element. The exit pupil extender also comprises two intermediate...
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7710624 |
Controlling the transmission amplitude profile of a coherent light beam in a holographic memory system
Holographic systems which shape coherent light beams are disclosed. These holographic systems may beam-shaping devices positioned in the path of coherent light beams to shape a coherent light beam...
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7672550 |
Illumination light source and image display apparatus
A coherent light source includes a plurality of light emitting points arranged in one-dimensional array. A beam shaping unit shapes a light beam so that a diameter of a light emitted from the...
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7586826 |
Compatible optical pickup
An optical pickup which is compatible with at least one high density recording medium that uses a blue-violet beam and at least one lower density recording medium, the optical pickup including: an...
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7538916 |
Document lighting device, image reader, color document reader, and image forming device
In a document lighting device, each of the plurality of the light emitting elements arrayed in a light source unit is arranged in a vicinity of a focal point on a cross section in a sub-scanning...
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7532372 |
Method for creating a holographic screen that reconstructs uniformly magnified three-dimensional images from projected integral photographs
A method of producing a holographic screen for reconstruction of uniformly magnified three-dimensional images from projected integral photographs. The screen is produced as an array of holographic...
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7527412 |
Surface emitting device and display apparatus including the same
A surface emitting device and a display apparatus including the same. The surface emitting device includes: a light source; and a light guide plate having a light exit surface on which holographic...
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7515319 |
Lens-less spectrometer
A lens-less system for analyzing an optical spectrum includes a sophisticated volume hologram for separating an incident diffuse optical signal into wavelength channels without aid of an external...
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7502152 |
Device for projecting an object in a space inside a vehicle
A device for projecting an object in a space of a vehicle is described. This object is preferably projected holographically, and a voice input and output system is assigned to this object. An...
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7436561 |
Hologram laser unit and optical pickup apparatus
A laser light beam of a first wavelength which is polarized in a first polarizing direction, emitted from first and second semiconductor laser elements and reflected by an information recording...
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7388696 |
Diffuser, wavefront source, wavefront sensor and projection exposure apparatus
A wavefront source having a wavefront formation structure (4a) and a diffuser with a scattering structure (2b) in the beam path in front of or at the level of the wavefront formation structure;...
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7355768 |
Wavelength tunable holographic filter with broad acceptance angle and narrow spectral bandwidth
A narrowband, tunable filter with a wide acceptance angle utilizes two holographic filter elements connected in series. The filter blocks light outside of a narrow spectral band of interest, while...
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7298553 |
Element for the combined symmetrization and homogenization of a bundle of beams
The invention relates to an element for the combined symmetrization and homogenization of a beam of rays and to a method for designing an element of this type. One object of this invention is to...
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7298535 |
Digital situation indicator
A personal monitoring system to be worn by an individual in a hazardous situation comprises an enclosed face mask which includes a transparent shield over at least the eves a sensor module secured...
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7227688 |
Apparatus for applying optical gradient forces
An apparatus and method for manipulating small dielectric particles. The apparatus and method involves use of a diffractive optical element which receives a laser beam and forms a plurality of...
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7218429 |
Digital focus lens system
A digital focus lens systems that can provide an optical system with a plurality of selectable focal powers is described. The system includes a number of switchable elements, each of which is...
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7212323 |
Methods and apparatus for mass manufacturing two-dimensional binary information on transparent substrates using phase contrast modulated templates
Methods and apparatus for making, encoding, and encrypting binary patterns for storing recorded information. One of the methods includes the steps of providing an original image, fragmenting the...
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7209269 |
Displaying holographic three dimensional images
Holographic three dimensional images of objects can be displayed via a device comprising micro holographic optical elements (MHOEs). A device for displaying holographic three dimensional images of...
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7180669 |
Method and system for generating substantially uniform speckle patterns
A diffractive optical element is positioned in an optical path between a coherent light source and a surface. The diffractive optical element is designed to disperse the light across one or more...
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7180668 |
Optical pickup device and optical disc device
This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into...
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7161131 |
Multiple wavelength quadrant detection
A quadrant detector includes a holographic optical element and a plurality of detector elements. The holographic optical element is designated to have four quadrants, each of which directs...
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7133172 |
Variable hologram element, and optical device using the same
The invention relates to an optical element with variable optical properties, which ensures that the amount of light available is increased, and an optical device using the same. In a liquid...
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7126730 |
Electro-holographic lens
An electro-holographic lens device comprising: an active layer made from a transparent photo-refractive material, whose refractive index may be locally modified by locally applying an electric...
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7099590 |
Filtering technique for free space interconnects
A filtering technique for a free space communication that features encoding and decoding of signals employing a filtering apparatus that includes a bulk holographic transform function. Employing...
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7050207 |
Optical pickup device using hologram pattern and hologram pattern generating method
Astigmatism and coma are suppressed in an optical pickup device such that light from a single real laser light source is diffracted and divided by a hologram module into a plurality of light spots...
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6992804 |
Part made of transparent material and headlight lens for vehicles
A part (1) made of transparent material that allows visible light waves to pass therethrough, said part comprising outer faces (11, 12) defining a solid body (10) made of transparent material, the...
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RE38943 |
Compound objective lens for optical disks having different thicknesses
A compound objective lens is composed of a hologram lens or transmitting a part of incident light without any diffraction to form a beam of transmitted light and diffracting a remaining part of the...
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6987614 |
Optical pickup and optical disc drive device
This invention is an optical pickup device having a composite optical element (32) which has a first diffraction grating (45) for splitting a light beam emitted from a light source (31) into...
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6972904 |
Pointable optical transceivers for free space optical communication
Optical transceivers include a diffractive optical element (DOE) attached to a surface of a prism or other optical support. The DOE is configured to direct an input optical signal to a planar or...
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6967754 |
Hybrid optical transceivers for free space optical communication
Optical transceivers include a diffractive optical element (DOE) attached to a surface of a prism or other optical support. The DOE is configured to direct an input optical signal to a curved...
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6952295 |
Hologram screen and hologram display
A hologram screen 1 displays an image by diffracting and scattering image light 31 projected from an image projection apparatus 2. An upward/downward light scattering device 13, which scatters...
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6867889 |
Transceiver for a wireless optical telecommunication system
A holographic optical element (HOE) device is mounted in wireless optical telecommunication system transceiver. The HOE device includes a developed emulsion material having an interference pattern...
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6856460 |
Diffractive optical element for providing favorable multi-mode fiber launch and reflection management
A light transmission system includes a laser, an optical fiber, and a transfer lens. The transfer lens transfers light emitted by the laser into the optical fiber. The transfer lens includes a...
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6853812 |
Polarized-holographic filtering providing improved extinction ratio
A filtering technique for free space communication that features an improved extinction ratio by providing a filter that employs a bulk holographic transform function and a polarizing film. In this...
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6847761 |
Optical module and method of forming the optical module
An object beam divided by a light dividing means 12 is caused to enter a photo-refractive polymer layer 6 through an optical fiber 23. On the other hand, a reference beam divided by the light...
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6842271 |
Rain sensor, in particular for a motor vehicle
A rain sensor for a motor vehicle, having a transmitter emitting radiation, a receiver, and a holographically embodied diffractive element that has a linear-grating-like structure.
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6738130 |
Ultra-light helmet-mounted laser range finder
A holographic telescope (40). The novel invention is comprised of an eyepiece (44) and a first holographic optical element (42) positioned to receive incident electromagnetic energy and focus the...
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6731415 |
Multi-aperture holographic optical element for use in a free space optical communication system
A holographic element (HOE) with multiple apertures formed in a single substrate for use an optical communication system. The multi-aperture HOE can be use instead of an optics unit having one or...
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