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7339710 Holographic recording medium, holographic reading system, and data reading method from the holographic recording medium  
A holographic disc recording medium records a hologram over the entire holographic disc recording medium by using a conical reference beam for recording. A hologram recorded image includes recorded...
7133171 Double facing double storage capacity  
A first holographic data storage device has a first set of holograms stored thereon. A second holographic data storage device has a second set of holograms stored thereon. An opaque layer is...
6639698 Optical scanning unit with rotatable hologram disc  
An optical scanning unit with a rotatable hologram disc, including a light source, a rotatable hologram disc provided with a plurality of holograms, the holograms being formed concentrically along...
6621607 Diffractive display  
The present invention is directed to an improvement in a diffractive display suitable for presenting graphic and the like displays. Broadly, a novel embodiment is realized from a holographic...
6570681 System and method for dynamic optical switching using a diffractive optical element  
An optical crossbar switch system includes: a mask comprising multiple patterns, wherein at least one of the multiple patterns is a diffractive pattern; and a spatial light modulator positioned to...
6529296 Hologram scanner  
A hologram scanner is constructed with a driving source for providing a rotational force, a deflection disk installed at the rotation shaft of the driving source for forming a scanning line, the...
6523750 Laser scanning system employing light collection surfaces having optical axes disposed off the bragg angle of the holographic optical elements of the holographic scanning disc thereof  
A holographic laser scanning system for scanning bar code symbols. The system comprises a holographic scanning disc having a plurality of holographic optical elements disposed thereon for scanning...
6522448 Optical element  
An optical element has a small reflection loss of light on a boundary surface between a photonic crystal and the normal medium. The optical element includes: a normal medium region having a first...
6307662 Blazed diffraction scanner  
A scanner includes a laser for projecting a laser beam at a facet having a blazed diffractive grating thereon. The facet is rotated relative to the laser to traverse the laser beam across the...
6292278 Beam scanning system adopting deflection disc  
A beam scanning system including: a light source; a deflection disc rotatably installed over the light sources and having a hologram pattern on each of the upper and lower surfaces thereof, for...
6185017 Diffractive deflection beam scanning system  
A diffractive deflection beam scanning system including: a plurality of light sources; a deflection disc rotatably mounted over the light sources, having patterns capable of diffracting and...
6181448 Multi-laser scanning unit  
A multi-laser scanning unit (LSU) in which scanning lines incident parallel onto a photoreceptor have the same scanning direction. The multi-laser scanning unit includes: a driving source for...
6181447 Laser scanning unit  
A laser scanning unit (LSU) in a structure capable of radiating heat generated by a light source. The LSU includes at least one light source, a driving source for providing rotational force, and a...
6172780 Laser scanning apparatus  
A laser scanning apparatus including an optical source installed on a main frame, a scan disk which is rotatably installed on the main frame and has diffraction patterns formed thereon for...
6157472 Multi-laser scanning unit  
A multi-laser scanning unit (LSU) in which scanning lines incident parallel onto a photoreceptor have the same scanning direction. The multi-laser scanning unit includes: a driving source for...
6124955 Light beam scanning apparatus  
A light-beam scanning apparatus includes at least two holograms with an optical path length difference ΔΦ along a scanning beam light flux. The path length is measured from a light source to a...
6118464 Beam scanning apparatus for electrophotographic color printer using deflection disk  
In a beam scanning apparatus of an electrophotographic color printer, at least two beam deflectors, each having a deflection disk consisting of at least two sectors and a driving source for...
6091544 Light beam scanning apparatus  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and...
6046831 Beam scanning apparatus  
A beam scanning apparatus includes an optical source, a beam deflector having a deflection disk which is comprised of a plurality of sectors patterned to diffract a beam emitted from the optical...
6040929 Light beam scanning apparatus  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and...
6020984 Light beam scanning apparatus using a rotating hologram and a fixed hologram plate  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as an optical lens or a mirror having curvature, and...
6018409 Multi-beam scanning apparatus  
A multi-beam scanning apparatus includes at least two optical sources, a beam deflector having a deflection disc with a plurality of sectors for diffracting and transmitting incident beams, and a...
5995250 Method for manufacturing light beam scanning apparatus  
A method of manufacturing a fixed hologram plate of a light-beam scanning apparatus for diffracting a light incident from a light source portion by a rotatable hologram, scanning by the diffracted...
5986778 Hologon deflector system having dispersive optical elements for scan line bow correction, wavelength shift correction and scanning spot ellipticity correction  
Bow can be minimized by an auxiliary grating in a post deflection path of the diffracted beam from the hologon which is disposed in non-parallel relationship to the plane of rotation of the...
5978111 Light beam scanning apparatus  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The...
5973837 Light distributing apparatus for dividing the light from a light source into a plurality of lights  
A light-beam scanning apparatus including a rotatable hologram and a fixed plate, which are provided with diffraction gratings to minimize: either a sum total of values obtained by weighting where...
5940195 Light beam scanning apparatus  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems such as optical lenses or a mirror having curvature, and...
5870220 Portable 3-D scanning system and method for rapid shape digitizing and adaptive mesh generation  
A portable 3D scanning system collects 2D-profile data of objects using a combination of a laser-stripe positioning device and a video camera which detects the images of the laser stripe reflected...
5861989 Light beam scanning apparatus  
A high-resolution light-beam scanning apparatus including a rotatable hologram and a fixed plate which are diffraction gratings for minimizing either a sum total of values obtained by weighting...
5861964 Method of manufacturing light beam scanning apparatus and fixed hologram plate and rotatable hologram and light distributing apparatus  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The...
5859715 Diffractive laser scanner  
A scanner (40) is disclosed which includes a source of coherent light (12), a radial holographic deflector (16), a Fθ lens (62), which images a scanned spot onto an image plane (18). The Fθ lens...
5805315 Holographic scanner including a rotary hologram disk between a front hologram and a rear hologram  
A holographic scanner for scanning a surface with a light beam is provided. The holographic scanner includes a light source for emitting light used as the light beam, a front hologram for...
5798851 Apparatus for correcting scanning position in optical scanner  
An optical scanner including a light source which is turned ON and OFF in accordance with drawing data. A hologram deflector, made of a rotatable planar hologram disc, provided with a plurality of...
5764391 Rotating knob, variable image holographic display  
A holographic display including a planar transparent light pipe (11) configured for rotation about a light pipe rotation axis that is orthogonal to the planar extent of the transparent light pipe...
5691831 Optical beam scanning device with hologram disc  
A laser source and a converging lens are provided so that a laser beam emitted from the converging lens travels substantially parallel to the surface of a hologram disc. A incidence mirror is...
5680253 Light beam scanning apparatus comprising a first and second diffraction grating plate  
A high-resolution light-beam scanning apparatus utilizing only mass-producible holograms instead of utilizing auxiliary optical systems, and capable of compensating for disadvantages. The...
5680232 Holographic scanner including a rotary hologram disk between a front hologram and a rear hologram  
A holographic scanner for scanning a surface with a light beam is provided. The holographic scanner includes a light source for emitting light used as the light beam, a front hologram for...
5646774 Mode-locked laser stabilizing method and apparatus  
This invention is an improvement of a mode-locked laser stabilizing method and apparatus used with a mode-locked laser apparatus which comprises an optical cavity which consists of an optical...
5621548 Laser scanner employing a holeless hologon disk and fabrication method therefor  
A method for fabricating a holeless hologon disk includes the steps of relatively positioning a disk assembly and a drive shaft assembly in closely spaced relation with the planar surface of the...
5619350 Optical scanning device  
An optical scanning device including a semiconductor laser and a scanning optical system which transmits a laser beam emitted from the semiconductor laser and scans the laser beam on a...
5555130 Holographic scanning  
A holographic grating element is provided which enables tracing different scan lines. The element is divided into a plurality of sectors. A first grating pattern is provided which diffracts a beam...
5550655 Laser beam optical scanner  
A laser beam passes through two holograms or through a hologram twice to reduce the ratio λ/d so that P-polarized light, as well as S-polarized light, can be diffracted with high diffraction...
5506703 Three-dimensional image display device  
A three-dimensional image display device which comprises a holographic plate having a plurality of holograms divided in correspondence with rotational angles, the holographic plate being exposed so...
5504595 Holographic scanning  
A holographic grating element is provided which enables tracing different scan lines. The element is divided into a plurality of sectors. A first grating pattern is provided which diffracts a beam...
5471326 Holographic laser scanner and rangefinder  
A holographic optical element (HOE) includes a substrate structure having rotational symmetry with respect to a rotational axis for rotatively supporting at least two holograms. A first hologram on...
5457550 Optical scanner unit having recursive optical system  
An optical scanner unit for scanning a document includes a laser unit for emitting a laser beam used for scanning the document, an optical system in which the laser beam emitted from the laser unit...
5448403 Binary diffractive optical element scanner  
An optical scanning system uses a stationary binary diffractive optical element and a rotating binary diffractive element to focus and scan a beam along the scan line.
5430560 Three-dimensional image display device  
A three-dimensional image display device which comprises a light source; a hologram divided into a plurality of divided areas and exposed so that point images are formed at different positions in a...
5418632 System and method for rotational scanner based volume display  
A three dimensional display having a rotating screen, preferably helical in shape, a light source providing a beam of light and a holographic pattern deflecting the beam of light to predetermined...
5379134 Holographic disk mounting system and method  
A holographic disk mounting system and method is disclosed utilizing a compressible O-ring which eliminates the clearance between the spin motor shaft and the holographic disk. The holographic disk...
Matches 1 - 50 out of 140 1 2 3 >