摘要:
A digital holographic apparatus, system, and method are disclosed. The apparatus includes an electronic display device comprising an interferometric spatial light modulator based display engine and a processor coupled to the electronic display device. The processor is operative to upload digital content to the electronic display device. The digital content is displayed on the electronic display device and is recorded into a holographic medium when the holographic medium and the electronic display device are flood exposed by a laser generated light beam. The system additionally includes at least one laser coupled optically coupled to the electronic display device and communicatively coupled to the processor. A method of recording a digital hologram in a holographic medium using the digital holographic system also is disclosed.
摘要:
A laser beam (L50) is reflected by a light beam scanning device (60) and irradiated onto a hologram recording medium (45). On the hologram recording medium (45), an image (35) of a linear scatter body is recorded as a hologram by using reference light that converges on a scanning origin (B). The light beam scanning device (60) bends the laser beam (L50) at the scanning origin (B) and irradiates the laser beam onto the hologram recording medium (45). At this time, by changing a bending mode of the laser beam with time, an irradiation position of the bent laser beam (L60) on the hologram recording medium (45) is changed with time. Diffracted light (L45) from the hologram recording medium (45) produces a reproduction image (35) of the linear scatter body on a light receiving surface (R) of the stage 210. When an object is placed on the light receiving surface (R), a line pattern is projected by hologram reproduction light, so that the projected image is captured and a three-dimensional shape of the object is measured.
摘要:
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 (3,11,P) is recorded, and minute reflection images F and O' from a light source (9) 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.
摘要:
The present invention is to provide a method for treating an optical recording medium including irradiating a recording layer, which has recorded information, with a treatment light through a light diffusion member having a haze of 70% to 100%, wherein the optical recording medium contains at least the recording layer which records information using holography, and a device for treating an optical recording medium containing a light source for the treatment light, and the light diffusion member having a haze of 70% to 100% and disposed between the light source and the optical recording medium, wherein the recording layer is irradiated with the treatment light through the light diffusion member from the light source. The preferred aspects are that a half width of wavelength for an energy intensity of the treatment light is 5 nm to 700 nm; and the optical recording medium is a write-once read-many optical recording medium.
摘要:
The present invention relates to a hologram viewing arrangement, to an alignment device, to a display device, to a device for aligning first and second members and to a device for aligning an optical beam with a desired target. A hologram viewing arrangement comprising a pixellated phase mask substrate (20) and a pixellated hologram display substrate (40), wherein the hologram display substrate is arranged to store data representing at least two distinct images (3a - 3d) , the arrangement being such that disposing the phase mask in a first position with respect to the display substrate enables one of the at least two images to be visible and disposing the phase mask in a second position with respect to the display substrate enables another of the at least two images to be visible.
摘要:
This invention generally relates to methods and apparatus for verifying data, and more particularly to holographic data carriers and apparatus for creating such data carriers, and to methods of verifying data stored on holographic data carriers. A data carrier comprising: a hologram storing data to reproduce an image of a portion of a human body characteristic of an individual; and a second data bearing device; and wherein data stored by said second data bearing device is verifiable using data stored in said hologram.
摘要:
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.
摘要:
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 η RO /η OO of a first diffraction efficiency η OO and a second diffraction efficiency η RO , is calculated. The diffraction efficiency η OO is dependent on two object light beams. The efficiency η RO is dependent on the object light and the reference light. In a second step, the intensity E O of the object light and the intensity E R of the reference light is adjusted in such a way that the ratio η RO /η OO is set to at least 10 and the efficiency η 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.
摘要翻译:一种用于产生记录由感光干板上的物体光和参考光形成的干涉条纹的全息图的方法以及具有漫射和散射特性或通过光漫射体的目标光主要包括以下步骤: 在第一步骤中,计算第一衍射效率eta OO和第二衍射效率ηRO的比值ηRO / eta OO。 衍射效率eta OO取决于两个物体光束。 效率ηRO取决于物体光和参考光。 在第二步骤中,调整对象光的强度EO和参考光的强度ER,使得等级RO / eta OO的比率设定为至少10,效率等级不超过5% 。 使用上述全息图的显示装置由用于产生信号光的显示单元构成; 通过反射或透射全息图形成的全息屏幕和用于将信号光投影到全息屏幕的投影单元。 根据本发明,当观察者观察屏幕上显示的图像以及使用上述全息图的显示装置时,可以容易地制造全息图,例如不具有混浊状态的屏幕全息图。
摘要:
Die Erfindung betrifft ein Verfahren zur Herstellung von kopier- und nachahmungssicheren, Echtheitsmerkmale aufweisenden Hologrammen, die Kopien eines Masterhologramms sind. Erfindungsgemäß wird als Masterhologramm ein Hologramm eines zufällig strukturierten optischen Elements, beispielsweise einer Mattscheibe, das das Echtheitsmerkmal bildet, aufgenommen und jede von dem Masterhologramm gezogene Hologrammkopie mit einer mindestens einen Farbverlauf aufweisenden Schicht versehen und/oder die auf eine dicke lichtempfindliche Schicht aufgenommene Hologrammkopie geschrumpft oder geschwellt.
摘要:
An encoded hologram (11) that produces a first image (I1) and a second image (I2) pursuant to playback illumination is provided, wherein the first image (I1) is resolvable by human vision while the second image (I2) is not resolvable by human vision when the playback illumination comprises non-coherent broad band illumination, and wherein the second image (I2) is machine readable when the hologram (11) is illuminated with playback illumination that is based on the original reference beam (PB2).