| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 101 | REFLECTION TYPE DIFFUSE HOLOGRAM, HOLOGRAM FOR REFLECTION HOLOGRAM COLOR FILTERS, ETC, AND REFLECTION TYPE DISPLAY DEVICE USING SUCH HOLOGRAMS | US11694159 | 2007-03-30 | US20070195391A1 | 2007-08-23 | Shingo Nishikawa; Kenji Ueda; Toshikazu Segawa; Tsuyoshi Hotta; Yuko Kuwabara; Masachika Watanabe |
| A method of fabricating a hologram having a pattern made up of pixels in which a photosensitive material for forming a hologram is stacked on either a reflection-type hologram or a transmission type hologram. According to one aspect of the invention, the photosensitive material is stacked on a reflection-type relief hologram and reconstructing illumination light of a given wavelength is struck on the reflection-type relief hologram through the photosensitive material, so that interference fringes produced by interference of the light diffracted from the reflection type relief hologram and the incident light are recorded in the photosensitive material. According to another aspect of the invention, the photosensitive material is stacked on a transmission-type hologram, and reconstructing illumination light of a given wavelength is struck on a side of the transmission type hologram that is not opposite to the volume hologram photosensitive material, so that interference fringes produced by interference of light diffracted from the transmission type hologram and reference light incident on the photosensitive material are recorded in the photosensitive material. According to a third aspect of the invention, the photosensitive material is stacked on a transmission type hologram, and reconstructing illumination light of a given wavelength is struck on a side of the transmission type hologram that is not opposite to the photosensitive material, so that interference fringes produced by interference of light diffracted from the transmission type hologram and zero-order transmitted light are recorded in the photosensitive material, and a reflecting layer is provided on a back side of the photosensitive material. | ||||||
| 102 | Reconfigurable spatial light modulators | US10528670 | 2003-10-06 | US07218435B2 | 2007-05-15 | Christopher William Slinger |
| This invention relates to reconfigurable spatial light modulators (SLM) incorporating a scatter plate. Computer generated diffraction patterns or holograms may be loaded on the (SLM) either as a single frame or as a series of frames for observation by an observer. In a preferred embodiment both an electrically addressable spatial light modulator (EASLM) and an optically addressable spatial light modulator (OASLM) are used. The (OASLM) may be formed of several smaller (OASLMs) arranged in a matrix format. The faster (EASLM) forms a light pattern on sub-areas of the large (OASLM) in turn to give a large display. The scatter plate is arranged at the output of the (SLM) nearest an observer. This scatter plate has a known characteristic and serves to increase the field of view and/or reduce the number of pixels required to give a holographic or two dimensional displays. Prior to producing a display, the diffraction patterns, holograms, or image in the computer is modified to take account of the properties of the scatter plate; a modified computer generated diffraction pattern, hologram, or image is then displayed to an observer. The system may also be used for optical switching. | ||||||
| 103 | High Throughput Holographic Spectrometer Using the Multiplexed Hologram | US11459102 | 2006-07-21 | US20070030490A1 | 2007-02-08 | Ali Adibi; Chao Hsieh; Arash Karbaschi; Omid Momtahan |
| One embodiment of a system includes a sophisticated volume hologram for dispersing an incident optical signal with uniform spectrum over an input plane to an output pattern with non-uniform spatial-spectral information, where the sophisticated volume hologram includes a plurality of holograms that map different input wavelengths into a diverse spatial pattern. The system further includes a detector for receiving and detecting light dispersed by the sophisticated volume hologram. Other systems and methods are also provided. | ||||||
| 104 | Hologram and its holographic process | US11483562 | 2006-07-11 | US20070008596A1 | 2007-01-11 | Tsuyoshi Yamauchi; Masachika Watanabe; Tomoko Kumasawa |
| The invention relates to a security-conscious hologram which can apply a sufficient three-dimensional appearance to a reconstructed image in both its vertical and horizontal directions, and which is difficult to illegally copy and easily told from any illegal copy forged from it, and a holographic process of recording it. The hologram H2 is of a combined reflection and volume type, wherein a subject image P is recorded, and minute reflection images F and O′ from a light source are recorded at least in front of, or in the rear of, the subject image P, both in a reconstructible fashion, and a viewing position E is moved along a hologram surface, so that the subject image P and the minute reflection images F and O′ are viewable at varied relative positions. | ||||||
| 105 | Information security using digital holography | US09822775 | 2001-03-30 | US20060078113A1 | 2006-04-13 | Bahram Javidi; Enrique Tajahuerce |
| A method and system for encrypting multi-dimensional information utilizing digital holography is presented. A phase-shifting interferometer records the phase and amplitude information generated by a three-dimensional object at a plane located in the Fresnel diffraction region with an intensity-recording device. Encryption is performed by utilizing the Fresnel diffraction pattern of a random phase mask. Images of different perspectives of the three-dimensional object focused at different planes can be generated digital or optically with the proper key after decryption. After decryption, images of the object, focused at different planes, can be generated digitally or optically. The method allows for the reconstruction of the object with different perspectives from a single encrypted image. The method does not require sending the key exclusively through a digital communication channel. Instead, a copy of the random phase key itself can be sent to the authorized user. A method of forming an image of an object is disclosed. The method comprises forming an original hologram of the object; compressing the original hologram of the object to form a compressed hologram; decompressing the compressed hologram of the object to form a decompressed hologram; and reconstructing the object from the decompressed hologram to form a multi-dimensional image of the object. | ||||||
| 106 | Color hologram display and its fabrication process | US11285950 | 2005-11-23 | US20060072178A1 | 2006-04-06 | Emi Takabayashi; Daijiro Kodama; Masachika Watanabe |
| The invention relates to a color hologram display an image of a three-dimensional object and a hologram image of a pattern of plane characters, images or the like are recorded in the same volume type hologram photosensitive material in a superposed or multiplexed fashion. A color hologram display 27′ comprising a combined reflection and volume type of single layer, wherein a color pattern 29g of plane characters, images or the like and a color three-dimensional subject image O″ are reconstructably recorded while spatially superposed one upon another. | ||||||
| 107 | Method and device for obtaining a sample with three-dimensional microscopy | US10742054 | 2003-12-18 | US07009700B2 | 2006-03-07 | Frank Dubois; Catherine Yourassowski |
| A method and device for obtaining a sample with three-dimensional microscopy, in particular a thick biological sample and the fluorescence field emitted by the sample. One embodiment includes obtaining interferometric signals of a specimen, obtaining fluorescence signals emanating from the specimen, recording these signals, and processing these signals so as to reconstruct three-dimensional images of the specimen and of the field of fluorescence emitted by the specimen at a given time. Another embodiment includes a digital holography microscope, a fluorescence excitation source illuminating a specimen, where the microscope and the fluorescence excitation source cooperate to obtain interferometric signals of the specimen and obtain fluorescence signals emanating from the specimen, means for recording the interferometric signals and fluorescence signals, and means for processing the interferometric signals and the fluorescence signals so as to reconstruct three-dimensional images of the specimen and of the field of fluorescence emitted by the specimen at a given time. | ||||||
| 108 | Hologram recording method, optical recording medium, and hologram-recording device | US11041443 | 2005-01-25 | US20060007513A1 | 2006-01-12 | Shin Yasuda; Yasuhiro Ogasawara; Jiro Minabe; Katsunori Kawano; Kazuhiro Hayashi; Hisae Yoshizawa; Koichi Haga |
| The present invention discloses a hologram-recording method, comprising recording a reflection-type volume hologram onto an optical recording medium by irradiating the optical recording medium with a modulated beam obtained by spatially modulating a laser beam and a diffused beam obtained by diffusing the modulated beam, coaxially but from different sides of the optical recording medium, respectively. The invention provides a hologram-recording method, an optical recording medium, and a hologram-recording device that enables on-demand recording of a reflection-type volume hologram which reliably prohibits forgery or alteration with a simple device configuration. | ||||||
| 109 | Inline type speckle multiplexed hologram recording apparatus and inline type speckle multiplexed hologram recording method | US11095596 | 2005-04-01 | US20050243389A1 | 2005-11-03 | Nobuhiro Kihara |
| An inline type speckle multiplexed hologram recording apparatus and method is disclosed which can condense signal light and reference light in a sufficiently overlapping relationship with each other on a hologram recording medium without using a lens having a large aperture and a wide angle of view. A signal light region and a reference light region are displayed on a spatial light modulator, and laser light is intensity modulated with recording data displayed in the signal light region to produce signal light while the laser light having passed through the reference light region is used as reference light. The signal light and the reference light are diffused by a diffuser and then condensed in an overlapping relationship with each other on a hologram recording medium by a lens such that interference fringes produced thereby are recorded in the hologram recording medium. | ||||||
| 110 | Hologram recording and reproduction apparatus | US10998643 | 2004-11-30 | US20050141388A1 | 2005-06-30 | Hisayuki Yamatsu |
| A hologram recording and reproduction apparatus is disclosed which can raise the degree of freedom in design to achieve miniaturization thereof and can raise the hologram recording density of the shift multiplexing type. Upon recording, recording light specially optically modulated by a spatial optical modulator and reference light having a wave front disturbed at random by a randomizing phase mask are coupled so as to have a common optical axis and introduced to a recording area of a hologram recording medium. As a result, the number of lenses to be moved so as to follow up the variation of the position of a recording area or a reproduction area can be reduced. Further, the random disturbance of the wave front of the reference light makes the shift selectivity sharp in both of the along-track direction and the cross-track direction. | ||||||
| 111 | Hologram making method | US11061596 | 2005-02-22 | US20050134949A1 | 2005-06-23 | Tamiki Takemori; Kenji Kon |
| The distance between a spatial light modulating device 7 and a lens 8 is set such that a real or virtual image position 9, 9′ (L, L′) of object light formed by the lens 8 is an observing position of a hologram 12′. Since a reconstructed image is fixed at the observing position L, L′, noise existing in the reconstructed image of the spatial light modulating device 7′ if any is fixed at the observing position and thus is unremarkable as noise, whereby the noise is substantially lowered. | ||||||
| 112 | Method and apparatus for illuminating a computer generated hologram | US10488543 | 2004-03-16 | US20040263930A1 | 2004-12-30 | Douglas Payne |
| A holographic display comprising a spatial light modulator, SLM, for displaying a computer generated hologram, CGH, containing horizontal or vertical parallax only, HPO, means for illuminating the SLM, and means for guiding light reflected from the SLM to a display region, the means for illuminating the SLM comprising a vertically/horizontally oriented line light source. | ||||||
| 113 | Method and device for obtaining a sample with three-dimensional microscopy | US10742054 | 2003-12-18 | US20040156098A1 | 2004-08-12 | Frank Dubois; Catherine Yourassowsky |
| A method and device for obtaining a sample with three-dimensional microscopy, in particular a thick biological sample and the fluorescence field emitted by the sample. One embodiment includes obtaining interferometric signals of a specimen, obtaining fluorescence signals emanating from the specimen, recording these signals, and processing these signals so as to reconstruct three-dimensional images of the specimen and of the field of fluorescence emitted by the specimen at a given time. Another embodiment includes a digital holography microscope, a fluorescence excitation source illuminating a specimen, where the microscope and the fluorescence excitation source cooperate to obtain interferometric signals of the specimen and obtain fluorescence signals emanating from the specimen, means for recording the interferometric signals and fluorescence signals, and means for processing the interferometric signals and the fluorescence signals so as to reconstruct three-dimensional images of the specimen and of the field of fluorescence emitted by the specimen at a given time. | ||||||
| 114 | Active digital hologram display | US10691041 | 2003-10-22 | US20040114204A1 | 2004-06-17 | Michael A. Klug; Craig Newswanger; Qiang Huang; Mark E. Holzbach |
| Certain types of holographic recording materials can be used to updateably record holographic stereograms formed when fringe patterns are generated through interference of an object laser beam containing image information with a reference laser beam. In this manner, calculation of fringe patterns is avoided, and instead perspective information is computed for a scene or object to be displayed, the information is downloaded to display hardware such as a spatial light modulator, and fringe patterns are subsequently generated through interference of an object laser beam containing this information with a reference laser beam in the classic hologram recording scheme. Previously recorded holographic stereograms or component hogels are updated by erasing the stereograms or component hogels and recording updated stereograms or component hogels, or by recording updated stereograms or component hogels in a separate portion of the holographic recording material. | ||||||
| 115 | Hologram recording medium, hologram recording method and hologram recording and reproducing apparatus | US10098616 | 2002-03-18 | US20020145773A1 | 2002-10-10 | Satoru Tanaka; Hajime Matsushita; Yoshihisa Itoh; Tomomitsu Kouno; Hideki Hatano |
| A hologram recording medium, a hologram recording method and a recording and reproducing apparatus are capable of recording an interference pattern onto a volume holographic memory at high density. In a hologram recording method for forming a plurality of areas of a refractive index grating corresponding to one portion of a three-dimensional light interference pattern of a coherent signal light beam and coherent reference light of a first wavelength modulated in accordance with information data within a recording medium made of a photo refractive crystal of a uniaxial crystal having a shape of parallel flat plates, the signal light beam and the recording reference light beam cross each other within the recording medium, and a gate light beam having a second wavelength for revealing recording sensitivity of the recording medium is simultaneously irradiated to the recording medium so as to pass through a portion of the recording medium for crossing the signal light beam and the recording reference light beam and demarcate a volume smaller than that of this crossing portion. In a reproducing step a reproducing reference light beam is generated by reflecting the recording reference light beam in the vicinity of the beam waist of the recording reference light beam. | ||||||
| 116 | Method for producing a hologram and a display device using the same | US74990000 | 2000-12-29 | US6392767B2 | 2002-05-21 | KANDA TOMOYUKI; TAKADA KENICHIRO |
| A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio etaRO/etaOO of a first diffraction efficiency etaOO and a second diffraction efficiency etaRO, is calculated. The diffraction efficiency etaOO is dependent on two object light beams. The efficiency etaRO is dependent on the object light and the reference light. In a second step, the intensity EO of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio etaRO/etaOO is set to at least 10 and the efficiency etaOO does not exceed 5%.A display device using the above hologram is structured by a display unit for generating a signal light; a hologram screen formed by either reflection or transmission hologram, and a projecting unit for projecting the signal light to the hologram screen.According to the present invention, it is possible to easily produce a hologram, for example, a screen hologram, having no cloudiness or cloudy state when an observer observes an image displayed on the screen, and to a display device using the above hologram screen. | ||||||
| 117 | Optical display apparatus | US09657797 | 2000-09-08 | US06377370B1 | 2002-04-23 | Yoshinao Taketomi; Toshihiro Kubota; Yoshihiko Tanji; Zenrou Hayashi |
| An optical display apparatus is provided that can utilize a low intensity point light source and that requires a small physical profile. The optical display apparatus comprises an image display apparatus including at least one point light source to form an image to be displayed for viewing, a hologram screen that defracts and reflects light from the point light source, and an imaging optical system arranged to adjust a focus in one direction of the image so that the point light source of the optical display apparatus is focused to a line on the hologram screen. The optical display apparatus reconstructs and images the image displayed on the image display apparatus on a virtual display plane. | ||||||
| 118 | Reflection type diffuse hologram, hologram for reflection hologram color filters, etc., and reflection type display device using such holograms | US09855639 | 2001-05-15 | US20010053004A1 | 2001-12-20 | Shingo Nishikawa; Kenji Ueda; Toshikazu Segawa; Tsuyoshi Hotta; Yuko Kuwabara; Masachika Watanabe |
| The invention provides a diffusing plate with the angle of diffusion controllable within a desired range by use of a hologram, which is capable of presenting bright displays so that it is applicable to, for instance, a backlighting diffusing plate for liquid crystal display device. A diffusing plate 2 having an angle of diffusion null is brought into close contact with a hologram photosensitive material 1. Then, parallel light 3 is obliquely at an angle of incidence null on the photosensitive material 1 while parallel light 4 is vertically incident on the diffusing plate 2. Thereupon, parallel light 4 is converted into diffused light 5 having an angle of diffraction null upon passing through the diffusing plate 2. Diffused light 5 interferes with obliquely incident parallel light 3 from the opposite direction in photosensitive material 1 to produce interference fringes, thereby forming a reflection type hologram. Upon parallel illumination light on the hologram at the same angle of incidence null at which parallel light 3 strikes for recording, diffused light having the same angle of diffraction null as that of diffused light 5 used for recording is reflected, and diffracted from this reflection type hologram. | ||||||
| 119 | Holographic optical element | US09628224 | 2000-07-28 | US06233071B1 | 2001-05-15 | Edwina Margaret Orr; David John Trayner |
| A holographic optical element comprising at least two sets of regions, the regions of each set being different from the regions of the other set(s) and being interleaved or overlapping with the regions of the other set(s) and being constructed such that light incident on each set of regions is directed to a respective one of a plurality of viewing zones. The holographic optical element is typically incorporated in a display device such as a stereoscopic display device. | ||||||
| 120 | Method for producing a hologram and a display device using the same | US08741175 | 1996-10-29 | US06198554B1 | 2001-03-06 | Tomoyuki Kanda; Kazutoshi Koie; Katsuyoshi Nishii; Masahiro Shiozawa; Katsumi Kamiya; Atsuo Ishizuka |
| A method for producing a hologram recording an interference fringe formed by an object light and a reference light on a photosensitive dry plate, and the object light either having diffusing and scattering characteristics or being passed through an optical diffusion body, mainly includes the following steps: In a first step, a ratio &eegr;RO/&eegr;OO of a first diffraction efficiency &eegr;OO and a second diffraction efficiency &eegr;RO, is calculated. The diffraction efficiency &eegr;OO is dependent on two object light beams. The efficiency &eegr;RO is dependent on the object light and the reference light. In a second step, the intensity EO of the object light and the intensity ER of the reference light is adjusted in such a way that the ratio &eegr;RO/&eegr;OO is set to at least 10 and the efficiency &eegr;OO does not exceed 5%. A display device using the above hologram is structured by a display unit for generating a signal light; a hologram screen formed by either reflection or transmission hologram, and a projecting unit for projecting the signal light to the hologram screen. According to the present invention, it is possible to easily produce a hologram, for example, a screen hologram, having no cloudiness or cloudy state when an observer observes an image displayed on the screen, and to a display device using the above hologram screen. | ||||||
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