| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Holographic stereogram printing system | US09221562 | 1998-12-28 | US06185018B2 | 2001-02-06 | Nobuhiro Kihara |
| A holographic stereogram printing apparatus that is able to formulae a holographic stereogram superior in light utilization efficiency and in picture uniformity. The holographic stereogram printing apparatus causes the laser light from a laser light source 31 to fall on a picture display device 41 to illuminate the light transmitted through the display device 41 as object light on a holographic recording medium 30. The holographic stereogram printing apparatus also causes part of the laser light prior to being transmitted through the display device 41 to be illuminated as reference light on the holographic recording medium 30 to form the element holograms sequentially on the holographic recording medium 30. In the holographic stereogram printing apparatus, a light integrator 63 for uniforming the intensity of light incident on the display device 41 is provided on the optical path of the laser light proceeding towards the display device 41. | ||||||
| 122 | Hologram reproduction process and volume hologram | US895322 | 1997-07-16 | US6052209A | 2000-04-18 | Shingo Nishikawa |
| The invention relates to a method for replicating a volume hologram having an image of a scattering object recorded therein according to a hologram replicating technique, wherein the diffraction 13 of an unnecessary order of light due to zero-order light, etc. arising from regular reflection and a visual range capable of viewing a recorded image is limited to a desired range .alpha., so that the image can be displayed more brightly than would be possible with the original hologram plate, and a volume hologram as well. When replicating a volume hologram 4' having an image O' of a scattering body recorded therein, replicating illumination light is incident on the volume hologram 4' at an angle of incidence I.sub.1 at which a group of fringes can be replicated and recorded, said group of fringes being such that, in the vicinity of an apex defined by a supposed slant angle S.sub.g at which a replicated hologram 4' can be viewed at a supposed viewing center angle .phi. within a range .alpha. upon illumination with illumination light 7 at a supposed illumination angle .theta., a recording degree of said group of fringes becomes weaker at a position farther away from said slant angle S.sub.g. | ||||||
| 123 | Method and apparatus for creating holographic stereogram | US882272 | 1997-06-25 | US5949559A | 1999-09-07 | Nobuhiro Kihara; Akira Shirakura; Shigeyuki Baba |
| A method and an apparatus for creating a holographic stereogram are provided for canceling noises localized to infinity and offering a high-quality hologram. The creating method is executed to display an image corresponding to a coordinate location on the hologram recording medium on the display unit, condense the laser beam transmitted through the display unit as an object beam at the coordinate location of the hologram recording medium, and apply part of the laser beam before transmission through the display unit as a reference beam onto the hologram recording medium, for sequentially forming stripped or dotted holographic elements on the hologram recording medium. The creating apparatus includes a first diffuser panel located close to the display unit, a mask, and a second diffuser panel, the latter two of which are located immediately before the hologram recording medium. The mask has an opening corresponding to the width of the holographic element. The second diffuser panel serves to one-dimensionally diffuse the object beam transmitted through the opening of the mask. The first diffuser panel is relocated at the exposure of each holographic element. | ||||||
| 124 | Master hologram for the production of copy-proof holograms | US564411 | 1995-11-29 | US5896208A | 1999-04-20 | Guenther Dausmann; Klaus Gnaedig |
| A method for the production of holograms proof against copying and imitation possessing authenticity features, which are copies of a master hologram. In accordance with the invention as a master hologram a hologram of a randomly structured optical element, as for example a diffusion plate, which constitutes the authenticity feature, is recorded and each hologram copy produced from the master hologram is provided with a layer having at least one layer with a color succession and/or the hologram copy produced on a thick light sensitive layer is caused to shrink or to expand. | ||||||
| 125 | Viewing screen formed using coherent light | US355818 | 1994-12-14 | US5609939A | 1997-03-11 | Joel Petersen; Jeremy Lerner |
| A viewing screen for incident light including a sheet of embossable material in which a first micro-sculpted surface relief structure that controls the direction in which light propagates has been formed by replicating in the sheet of embossable material a second micro-sculpted surface structure that controls the direction in which light propagates, the second micro-sculpted surface structure having been formed in a photosensitive medium having a refractive index by (i) generating random, disordered and non-planar speckle in the photosensitive medium with coherent light which has been diffused through a holographic diffuser so as to define non-discontinuous and smoothly varying changes in the refractive index of the photosensitive medium which scatter collimated light into a controlled pattern with smooth brightness variation and (ii) developing the photosensitive medium, the incident light being incident on and returned from the viewing screen to a viewing area, the viewing screen controlling the direction of the incident light that is emanating from the viewing screen to the viewing area and increasing brightness in the viewing area relative to an area outside the viewing area. | ||||||
| 126 | Real image holographic stereograms | US142917 | 1988-01-12 | US4834476A | 1989-05-30 | Stephen A. Benton |
| Methods and devices for recording and projecting holographic stereograms are disclosed. In one aspect of the invention, a concave semi-cylindrical ("alcove") display system is disclosed in which an image is projected in front of the alcove. The display system provides a very wide angle of view approaching 180 degrees (compared to the 30 degrees of a typical flat hologram) that allows the viewer to look around most of the image content. This type of display is particularly useful in computer aided design projects where designers wish to present an overall three-dimensional display of their work. In another aspect of the invention, a holographic printer and procedures for recording a stereogram are disclosed as well as techniques for producing "predistorted" images for the sub-holograms. A digital processing technique is disclosed which effectively predistorts the source two-dimensional image set for the stereogram to compensate for the effects of the display geometry. This predistortion technique relies upon anamorphic ray tracing. A crossed slit model for the holographic optical system is used to determine the direction and origin of the rays of light from which each sub-hologram of the stereogram is made. | ||||||
| 127 | Optical device for printing planar objects | US121178 | 1980-02-13 | US4353616A | 1982-10-12 | Pierre Leclerc; Jean-Pierre Huignard; Philippe Aubourg |
| The invention relates to an optical printing device with unity magnification using coherent light and making it possible to significantly reduce speckle on the print.It relates to a printing device comprising a device for illuminating the object, a device receiving the object wave and in real time restoring a wave phase conjugate with the object wave to form a real image of the object. The printing device also comprises a photosensitive support placed in the image plane. The object illuminating device forms on the object to be reprinted a lighting spot which is of small size compared with the object, and the printing device also comprises scanning means for completely scanning the object a number of times by the lighting spot so as to superimpose a large number of images of the same zone having uncorrelated noises on the photosensitive support.The invention, more particularly, finds application in the printing of high resolution masks and large surface areas. | ||||||
| 128 | Method of making a synthetic focused image hologram | US468291 | 1974-05-08 | US3985419A | 1976-10-12 | Kazuya Matsumoto; Akio Yano |
| A method of making a synthetic focused image hologram consisting of:A step to diffusely illuminate plural number of component pictures having different image informations with coherent beam, a step to image by an imaging optical system the images of the plural number of component pictures having different image informations on a hologram recording medium,A step to irradiate a coherent reference beam on a hologram recording medium, andA step to have the beam from the component pictures and the reference beam interfere with each other and to record the interference fringes generated by said interference on the recording medium. | ||||||
| 129 | Return beam holography | US3604777D | 1969-10-21 | US3604777A | 1971-09-14 | MATHISEN EINAR S; SHEINER LEONARD S |
| Method and apparatus for constructing and reconstructing a hologram, whereby the hologram is reconstructed upon the original image plane used in constructing the hologram, by use, in one embodiment, of a spherical mirror placed to reflect divergent light originally passing through the hologram, back through the hologram as convergent light. Included are liquid gate means for reducing reflection glare from the hologram onto the reconstructed image.
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| 130 | Focused image holography with extended sources | US3535013D | 1967-10-20 | US3535013A | 1970-10-20 | ROSEN LOWELL |
| 131 | Holographic-stereogram-forming apparatus, diffusing member, and holographic-stereogram-forming method | US15007799 | 2016-01-27 | US10120338B2 | 2018-11-06 | Yasuhiro Ogasawara; Jiro Minabe; Shigetoshi Nakamura; Takashi Kikuchi; Masahiro Igusa; Motohiko Sakamaki |
| A holographic-stereogram-forming apparatus includes a laser beam source that generates a laser beam to be split into an object beam and a reference beam; a display that displays an original image corresponding to a substantially strip-shaped holographic element constituting a holographic stereogram containing parallax information in a horizontal direction; a diffusing unit provided on a light-emission side of the display and including optical elements having different thicknesses in a direction of light transmission, the optical elements being arranged in a matrix and each having a substantially rectangular shape with a vertical length being shorter than a horizontal length, the diffusing unit diffusing object beam more widely in the vertical direction than in the horizontal direction, the object beam to be diffused by the diffusing unit being generated by the display; and a condensing unit that condenses the object beam diffused by the diffusing unit on a hologram recording medium. | ||||||
| 132 | COHERENCE ADJUSTABLE DIGITAL HOLOGRAPHY SYSTEM | US15633859 | 2017-06-27 | US20180004157A1 | 2018-01-04 | No Cheol PARK; Jang Hyun CHO; Sung Bin JEON; Ji Nan JIN |
| Disclosed is a coherence-adjustable digital holography system. More particularly, the coherence-adjustable digital holography system includes a light source part for generating low-interference light; a dispersion part for dispersing the generated light, an adjustment part for adjusting coherence by adjusting a spectrum bandwidth of the light which has passed through the dispersion part; and a detection part for detecting a holographic image of a subject from the adjusted light. In accordance with such a configuration, an interference fringe may be easily obtained through coherence adjustment, whereby the accuracy of a detected holographic image may be improved. | ||||||
| 133 | HOLOGRAPHIC LIGHT FIELD IMAGING DEVICE AND METHOD OF USING THE SAME | US15288728 | 2016-10-07 | US20170102671A1 | 2017-04-13 | Ryan Althoff Damm; Kris Somboon Chaisanguanthum |
| A holographic light field imaging device and method of using the same. The holographic light field imaging device may optically compress the light field into a lower-dimensional, coded representation for algorithmic reconstruction by transforming the light field in a known, calculable way. The resulting wavefront may be optically compressed before capture, wherein the compression may later be reversed via software algorithm, recovering a representation of the original light field. | ||||||
| 134 | Digital holography three-dimensional imaging apparatus and digital holography three-dimensional imaging method | US14567436 | 2014-12-11 | US09599960B2 | 2017-03-21 | Akira Eguchi |
| The imaging apparatus includes an optical system dividing light into object and reference beams and causing the object beam and the reference beam to interfere with each other to form interference fringes on an image sensor. A processor performs multiple imaging processes for the interference fringes with different incident angles of the object beam to an object, a first process to acquire a transmitted wavefront for each incident angle and a second process to calculate a three-dimensional refractive index distribution from the transmitted wavefronts. The apparatus includes a modulator changing a phase distribution of light in any one of an optical path from a light source to a dividing element, a reference beam path and an optical path from a combining element to the image sensor and causes the modulator to change the phase distribution in at least one of the multiple imaging processes. | ||||||
| 135 | Beam divergence and various collimators for holographic or stereoscopic displays | US13808379 | 2011-04-11 | US09395690B2 | 2016-07-19 | Gerald Futterer |
| A holographic display with an illumination device, an enlarging unit and a light modulator. The illumination device includes at least one light source and a light collimation unit, the light collimation unit collimates the light of the at least one light source and generates a light wave field of the light that is emitted by the light source with a specifiable angular spectrum of plane waves, the enlarging unit is disposed downstream of the light collimation unit, seen in the direction of light propagation, where the enlarging unit comprises includes a transmissive volume hologram realizing an anamorphic broadening of the light wave field due to a transmissive interaction of the light wave field with the volume hologram, and the light modulator is disposed upstream or downstream of the anamorphic enlarging unit, seen in the direction of light propagation. | ||||||
| 136 | LIGHT EXTRACTING DIFFUSIVE HOLOGRAM FOR DISPLAY ILLUMINATION | US14455532 | 2014-08-08 | US20160041323A1 | 2016-02-11 | Jian Ma; Kebin Li; Chung-Po Huang; Tallis Young Chang; John Hyunchul Hong; Mark Phung; Zheng-wu Li |
| This disclosure provides systems, methods and apparatus for illumination, such as for illuminating displays, including reflective displays. An illumination device may include a light-extracting, diffusive holographic medium. The holographic medium may be a holographic film and may be disposed on the surface of a light guide, and includes a hologram that both extracts light out of the light guide and diffuses this extracted light for propagation towards the display elements of the display. The hologram can extract light by redirecting light, which is propagating within the light guide, so that the light propagates out of the light. The diffusion occurs upon the light being redirected, as the hologram redirects the light towards the light guide in a controlled range of angles. | ||||||
| 137 | DISPLAY DEVICE AND OPERATING METHOD THEREOF | US13961929 | 2013-08-08 | US20140218422A1 | 2014-08-07 | Woojae PARK; Dowoo Kwon; Wonseok Moon |
| A display device according to embodiments of the present disclosure includes a determination unit to determine a display mode, a light generator to selectively irradiate a 2D light or a hologram 3D light, a spatial light modulator to selectively display a 2D image or a hologram 3D image, and a control unit that controls the light generator to selectively irradiate the 2D light or the hologram 3D light and controls the spatial light modulator to modulate the 2D light or the hologram 3D light irradiated from the light generator to display the 2D image or the hologram 3D image according to the display mode determined by the determination unit. | ||||||
| 138 | PROJECTION TYPE IMAGE DISPLAY DEVICE | US14113086 | 2012-04-20 | US20140092321A1 | 2014-04-03 | Makio Kurashige |
| To effectively suppress speckle noise generated when coherent light is used as a light source in a projection type image display device using an LCOS (Liquid Crystal On Silicon).A projection type image display device according to the present invention includes: a light source that emits coherent light; an optical scanning section that scans the coherent light emitted from the light source; an LCOS that has an image formation area in which an image is formed; a projection optical system that projects an image formed on the image formation area on a screen; and a hologram that has polarization selectivity and diffuses scanning light scanned by the optical scanning section so as to allow diffusion light emitted from respective points thereof to illuminate the image formation area in an overlapping manner. | ||||||
| 139 | BEAM DIVERGENCE AND VARIOUS COLLIMATORS FOR HOLOGRAPHIC OR STEREOSCOPIC DISPLAYS | US13808379 | 2011-04-11 | US20130170004A1 | 2013-07-04 | Gerald Futterer |
| A holographic display with an illumination device, an enlarging unit and a light modulator. The illumination device includes at least one light source and a light collimation unit, the light collimation unit collimates the light of the at least one light source and generates a light wave field of the light that is emitted by the light source with a specifiable angular spectrum of plane waves, the enlarging unit is disposed downstream of the light collimation unit, seen in the direction of light propagation, where the enlarging unit comprises includes a transmissive volume hologram realising an anamorphic broadening of the light wave field due to a transmissive interaction of the light wave field with the volume hologram, and the light modulator is disposed upstream or downstream of the anamorphic enlarging unit, seen in the direction of light propagation. | ||||||
| 140 | HOLOGRAM REPLICATING METHOD AND HOLOGRAM REPLICATING APPARATUS | US13663218 | 2012-10-29 | US20130120814A1 | 2013-05-16 | Masaki Arai; Akira Shirakura |
| A hologram master having a hologram image recorded thereon is brought into intimate contact with a surface of a hologram recording medium containing a photosensitive material directly or via a refractive index adjuster. The hologram image is made to have continuous parallax in at least a first direction with a movement of an eyepoint along the first direction with respect to a normal line when the hologram master is illuminated at a predetermined angle. First laser light is applied onto the hologram master and the hologram recording medium via a diffusion plate configured to diffuse incident light in a second direction. Second laser light is applied onto the hologram recording medium via the hologram master simultaneously with the first laser light. The hologram image recorded on the hologram master and first additional information are recorded on the hologram recording medium. | ||||||
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