Broj patenta: US 5,282,066, Multiple layer holograms, 1994-01-25 (25.1.1994)
Pronalazači: Kevin Yu, Khin S. Yin, John E. Wreede
Vlasnik: Hughes Aircraft Company
ABSTRACT: Multiple layers or holographic exposures and methods for preparing multiple layers of holographic exposures are described. The multiple layers of holographic exposure combine to form holographic stacks and are fabricated from layers of exposed and processed photosensitive recording films, each of which has at least one independently recorded hologram. The holographic stacks are useful for providing wide bandwidth holograms and holograms having superimposed images.
Broj patenta: US 5,276,537, Diamondlike carbon thin film protected hologram and method of making same, 1994-01-04
Pronalazači: Savant, Gajendra D.; Rich, Christopher C.; Pelka, David G.;
Vlasnik: Physical Optics Corporation (Torrance, CA)
ABSTRACT: A diamondlike carbon thin film protected hologram comprises an organic film deposited on a substrate and recorded to form a hologram, and a diamondlike carbon thin film deposited on the hologram, or first and second substrates having a diamondlike carbon thin film deposited thereon and an organic film having a holographic pattern recorded therein and sandwiched between the diamondlike carbon thin films of the first and second substrates. A method of fabricating a diamondlike carbon thin film protected hologram comprises forming a layer of dichromated gelatin on a substrate, recording the dichromated gelatin to form a hologram, and depositing on the hologram a diamondlike carbon thin film at room temperature, or depositing a diamondlike carbon thin film on first and second substrates, forming a layer of dichromated gelatin on the thin film of one of the substrates, recording the layer to form a hologram, and adhering the thin film of the second substrate to the hologram. The diamondlike carbon thin film protected hologram of the present invention is impervious to moisture and humidity and other environmental conditions which would otherwise negatively affect the performance of the hologram.
Broj patenta: US 5,592,313, Methods and apparatus for making holograms, 1997-01-07
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel (Laguna Hills, CA)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two-dimensional images, together representative of a physical three-dimensional system, to generate a three-dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 5,675,437, Light control film for use in viewing holograms and related method, 1997-10-07
Pronalazači: Hart, Stephen J.; Mailand, Ken;
Vlasnik: Voxel (Laguna Hills, CA)
ABSTRACT: An apparatus for reconstructing holographic images includes a white light source, diffraction grating (1112) for generating zero-order diffracted light (1416) and at least first-order diffracted light, and light control film (LCF 1810) which is configured to block the zero-order diffracted light and to facilitate passage of a desired bandwidth of first-order diffracted light therethrough. In one embodiment light control film (LCF 1810) comprises a front layer (1802), a core layer (1804), and a back layer (1806). The back layer (1806) may be thought of as a datum, whereby a lateral shift in front film (1802) results in avelength selectively, and a corresponding shift in core layer (1804) results in good zero-order light blocking. The resulting light is a pseudo-monochromatic source having sufficient coherence for use as a hologram reconstruction beam.
Broj patenta: US 5,745,267, Apparatus for making holograms including a variable beam splitter assembly, 1998-04-28
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel (Laguna Hills, CA)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 5,796,500, Methods and apparatus for making holograms, 1998-08-18
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel (Laguna Hills, CA)
ABSTRACT: A method and apparatus (300) for making holograms includes a technique for exposing a film substrate (319) or other light sensitive medium to consecutive two-dimensional images, together representative of a three-dimensional system, to generate a three-dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate (319). Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 6,123,733, Method and apparatus for rapidly evaluating digital data processing parameters, 2000-09-26
Pronalazači: Dalton, Michael;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: Method and apparatus provides for simulating digital holographic data on a desktop computer. In one aspect, an approximation of substantially accurate pixel intensities is achieved by collapsing three-dimensional data onto a two-dimensional view, without the need for constructing complex summations of fringe patterns. A power function is applied to each voxels in the data set. The values for a particular x, y coordinate are then summed along the z axis, with the resultant sum value being stored in a sum buffer for all values of x and y. The maximum value of the sum buffer is determined, then the sum buffer values are normalized by this maximum value. Finally, an inverse power function is applied to the normalized sum, then the results are scaled over the range of values of the output buffer. Consequently, the operator is able to view in real time, simulations of a single view of a hologram created from the selected parameters.
Broj patenta: US 6,151,143, Methods and apparatus for making holograms including multiple two-dimensional images, 2000-11-21
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 6,266,167, Apparatus and method for replicating a hologram using a steerable beam, 2001-07-24
Pronalazači: Klug, Michael Anthony; Holzbach, Mark E.; Ferdman, Alejandro Jose;
Vlasnik: Zebra Imaging, Inc. (Pflugerville, TX)
ABSTRACT: An apparatus and method are disclosed for replicating a hologram. The apparatus comprises an assembly operable to position a hologram in proximity to holographic recording material. The apparatus further comprises a beam steering unit operable to direct a beam at component portions of the hologram to replicate the component portions onto a holographic recording material. The beam steering unit is further operable to enable independently variable angles of incidence at which the beam strikes each component portion.
Broj patenta: US 6,441,930, Method and apparatus for making holograms including a diffuser shiftable in its own plane, 2002-08-27
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 6,636,336, Apparatus for making holograms including means for controllably varying a beamsplitter, 2003-10-21
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium toconsecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 6,674,554, Apparatus for making holograms including images of particular sizes, 2004-01-06
Pronalazači: Hart, Stephen J.;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: A method and apparatus for making holograms includes a technique for exposing a film substrate or other light-sensitive medium to consecutive two dimensional images, together representative of a physical three-dimensional system, to generate a three dimensional hologram of the physical system. Low beam ratios are employed to superimpose multiple (20-300) images on the substrate. Each image is relatively weak, but the combination of the series of weak images ultimately appears as a single clearly defined hologram.
Broj patenta: US 6,748,347, Method and apparatus for rapidly evaluating digital data processing parameters, 2004-06-08
Pronalazači: Dalton, Michael;
Vlasnik: Voxel, Inc. (Provo, UT)
ABSTRACT: The present invention includes a method and apparatus for simulating, for example on a desktop computer, a specific view of a hologram. A preferred embodiment of this invention suitably enables, in medical imaging, the manipulation of intensity transformations (windowing and leveling), regions (cropping) and views (axial, coronal and lateral) and the display of the resulting simulations in substantially real time. In accordance with one aspect of the present invention, an approximation of substantially accurate pixel intensities is achieved by collapsing three-dimensional data onto a two-dimensional view, without the need for constructing complex summations of fringe patterns, as is typically required when constructing a hologram. A power function is suitably applied to each voxel in the data set. The values for a particular x, y coordinate are then summed along the z axis, with the resultant sum value being stored in a sum buffer for all values of x and y. The maximal value of the sum buffer is determined, then the sum buffer values are normalized by this maximum value. Finally, an inverse power function is applied to the normalized sum, then the results are scaled over the range of values of the output buffer. Consequently, the operator is able to view, in substantially real time, simulations of a single view of a hologram created from the selected parameters.
Broj patenta: US 7,093,815, Vibration quenching substrate for diagnostic equipment susceptible to vibrations, 2006-08-22
Pronalazači: Stofiel, Steven Patrick;
Vlasnik: Hitachi Medical Systems America, Inc. (Twinsburg, OH)
ABSTRACT: A vibration quenching substrate which effectively isolates diagnostic equipment such as magnetic resonance imaging devices from image degrading vibrations. The substrate comprises numerous layers including a base layer, an elastomeric layer, and an inertia base layer which free-floats on the elastomeric layer. Importantly, the elastomeric layer is free of any rigid connection to either the base or inertia base layers.
Broj patenta: US 6,490,060, Lightweight holographic sight, 2002-12-03
Pronalazači: Tai, Anthony M.; Sieczka, Eric J.;
Vlasnik: EOTech, Inc. (Ann Arbor, MI)
ABSTRACT: A lightweight contact holographic sight includes a housing and a base which form a compartment containing a laser diode, an associated power source, and optical elements including a mirror, an off axis collimator, a reflection grating, and an image hologram of a reticle pattern, wherein the optical elements are arranged within the compartment to direct and fold the laser beam in a substantially generally vertical path. In one aspect of the invention, an elevation and windage adjustment mechanism is provided to rotate the reflection grating about two orthogonal axes to thereby adjust the projected reticle pattern for windage and elevation. In another aspect of the invention a removable battery compartment including a cam surface which is releasably contacted by a cam lever arm pivotally mounted on the sight housing or the base to allow for quick tool-less removal of the compartment for battery replacement.
Broj patenta: US 5,483,362, Compact holographic sight, 1996-01-09
Pronalazači: Tai, Anthony M.; Upatnieks, Juris; Sieczka, Eric J.;
Vlasnik: Environmental Research Institute of Michigan (Ann Arbor, MI)
ABSTRACT: A holographic sight which includes a base having at least one connector for mounting the base on a small arm, and a hologram of a reticle pattern, a compact laser light source for illuminating the hologram, and a power source for the laser diode, each mounted on the base. The sight also includes an achromatizer supported in the path of the light beam for reducing shifts in the position of the reticle pattern due to variations in the wavelength of the light beam emitted from the laser diode. The sight may further include means for circularizing the generally elliptical beam emitted by the laser diode to provide a uniform illumination pattern for the hologram. A brightness adjuster and position adjuster, for varying the brightness and relative position of the reticle, respectively, may also be provided.