WO2000026702A1 - Dispositif d'enregistrement pour reseau de diffraction et procede d'enregistrement d'image tridimensionnelle ou bidimensionnelle - Google Patents

Dispositif d'enregistrement pour reseau de diffraction et procede d'enregistrement d'image tridimensionnelle ou bidimensionnelle Download PDF

Info

Publication number
WO2000026702A1
WO2000026702A1 PCT/CN1999/000181 CN9900181W WO0026702A1 WO 2000026702 A1 WO2000026702 A1 WO 2000026702A1 CN 9900181 W CN9900181 W CN 9900181W WO 0026702 A1 WO0026702 A1 WO 0026702A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
optical
recording
light
focus
Prior art date
Application number
PCT/CN1999/000181
Other languages
English (en)
French (fr)
Inventor
Xiaojing Shao
Original Assignee
Xiaojing Shao
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiaojing Shao filed Critical Xiaojing Shao
Priority to EP99953521A priority Critical patent/EP1132758A4/en
Priority to AU10267/00A priority patent/AU1026700A/en
Publication of WO2000026702A1 publication Critical patent/WO2000026702A1/zh

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
    • G03H1/30—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique discrete holograms only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1847—Manufacturing methods
    • G02B5/1857—Manufacturing methods using exposure or etching means, e.g. holography, photolithography, exposure to electron or ion beams
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/04—Processes or apparatus for producing holograms
    • G03H1/0476—Holographic printer
    • G03H2001/0482—Interference based printer

Definitions

  • the present invention relates to a diffraction grating device and a method for recording a stereoscopic or planar image, and in particular, to a diffraction grating recording device for an optical interference pattern and a method for recording a stereoscopic or planar image.
  • a device for reducing and projecting an image to form an optical diffraction effect is to use an optical display to display a Fourier transformed information image obtained after complex calculation, and image the reduced projection onto a photosensitive material to form a stereo Holographic effect for commercial anti-counterfeiting.
  • This method and device there are many imperfections in this method and device, such as: the calculation of the Fourier transform information to form a planar or stereoscopic image will cause a waste of computing time and a loss of computing information, and the formed planar or stereoscopic image and general holography
  • the synthesis method There is no obvious difference in the synthesis method, and it is easy to be seen through at a glance, and it can be imitated by molding and exposure. This technology is not ideal in preventing counterfeiting.
  • a two-beam focusing on a point to form a raster element is integrated into a dot matrix type raster image.
  • the interference point formed is circular or elliptical, which is likely to cause a gap between adjacent ones, and the optical diffraction intensity of the grating element is caused by the uneven distribution of the intensity of the beam section.
  • the distribution is uneven. Adding to the limited section of the beam, it is difficult to improve the fineness of the overall raster image formed by it.
  • an electron gun drawing system is generally used to scan each raster to record a high-resolution raster image.
  • the electron gun drawing system is expensive, the maintenance is very complicated, the operating environment is very strict, and the drawing speed is slow.
  • the recording materials used are different from general comprehensive recording materials, so there is great difficulty in combining traditional recording.
  • An object of the present invention is to provide a diffraction grating and a recording device and a recording method for stereo or planar images, which can provide a single operation step for the diffraction grating and use a composite security function recording method to improve the security effect.
  • An optical media recording device with an optical diffraction effect the main components of which include: a light source generator, a sound optical modulator, a diffuser, a pinhole mask, and a 1/2 wave Long plate, 1/4 wave plate, beam splitter, spatial optical adjuster, focus adjustable lens combination, autofocus system, material fixed platform, horizontal and vertical moving stage, reference light projector, system control device, beam opening Closed valve, system support,
  • the system control device is connected to the beam opening / closing valve, acoustic optical adjuster, diffuser, spatial optical adjuster, focus adjustable lens combination, horizontal and vertical mobile stage via its interface interface, and performs overall control operation and calculation. Output recorded images and digital information to achieve the purpose of recording optical media with special optical diffraction function or with counterfeit function that cannot be copied with lamination exposure;
  • a system consisting of optical components such as acoustic optical modifiers, diffusers, pinhole masks, 1/2 wavelength plates, 1/4 wavelength plates, beam splitters, spatial optical modifiers, and focus-adjustable lens combinations
  • the receiving rigid body in order to maintain a specific structural relationship between them during operation, the receiving rigid body is connected to an autofocus system with up and down movement and an autofocus function, and the system support body supports the movement of the autofocus system;
  • the horizontal and vertical moving stage drives the material fixed platform to move to the desired exposure position.
  • a raster recording method with a plane or stereo optical diffraction effect which is characterized by: displaying a calculated optical intensity distribution image by using a spatial optical modulator, and using a high-speed rotating diffuser plate to transform an interferable beam into a non-interferable
  • the light beam is illuminated on the image of the spatial optical tuner, and the amplitude distribution of the image is reduced by a combination of focus-adjustable lenses at an appropriate magnification, projected and imaged on the surface of the optical photosensitive material, and the diffuser plate is rotated at high speed to obtain an instant.
  • a method for recording a stereoscopic image effect which is characterized by: displaying a multi-angle object image using a spatial optical modulator, and stopping rotation of a diffuser plate using a system control device to obtain an interfering light beam and adjusting an adjustable focus at the same time
  • the lens combination projects the above image to an infinity or to a focused imaging surface between the lens and the material fixed platform, and is guided by a reference light projector from a direction opposite to the material fixed platform
  • the other interfering beams interfere with each other to form a tiny holographic element, which is executed repeatedly in turn
  • a series of multi-view images are exposed to form a holographic image with a stereoscopic effect.
  • a method for recording a small hidden image that is difficult to copy which is characterized by: using a space-to-space optical modulator to display an image or text to be hidden, and using a focus-adjustable lens combination to reduce and project this image onto a focused imaging surface
  • the diffuser plate is rotated at a high speed to eliminate light wave noise, and the optical intensity of the above image is exposed on the surface of the optically sensitive material, so as to produce an anti-counterfeit optical medium that is not visible to the naked eye and difficult to be copied by the traditional holographic lamination exposure method.
  • a method for recording digital phase-type holograms which is characterized by: using acoustic optical modulators to convert digital gray-scale information calculated by a system device into the intensity of 11-time diffracted beams to control the erosion spot
  • the depth of the field is restricted by the pinhole mask to become a point-shaped light source with a certain diameter.
  • the spatial optical modulator is turned off by the system control device, and the focus adjustable lens combination is used to focus the above-mentioned pinhole image.
  • the exposure is made into a little digital phase type information, and then the horizontal and vertical moving stage is moved to the next exposure position. In this way, an integrated digital phase type holographic information is recorded again and again.
  • autofocus The system adjusts its up and down position at any time to ensure that the pinhole image is focused on the same side.
  • FIG. 1 is a schematic diagram of each mechanical component of the present invention
  • FIG. 2 is a flowchart of a computer-controlled program to complete image recording
  • Figure 3 is a computer interface connection diagram
  • Figure 4 is a diagram of a digital image recording method
  • FIG. 5 is a diagram of a stereo holographic recording mode
  • Figure 6 shows a raster recording method
  • the mechanism includes: a perturbable light source (laser) generator 1, a plane mirror 2, half lenses 3 and 4, an acoustic optical modulator 5 (referred to as A0M), light shielding plate 6, reflecting mirrors 7 and 8, pinhole mask 9, diffuser plate 10, lens 11, 1/2 wavelength plate 12, beam splitter 13, 1/4 wavelength plate 14, spatial optical modulator 15 (SLM for short), focus adjustable lens combination 16-18, focusing imaging surface 19-A, optical photosensitive material surface 19-B, autofocus system 20, beam opening and closing valve 21-A, reference light projector 22, Material fixing platform 23, system support body 24, horizontal and vertical moving stage 25-26, receiving rigid body 27, and system control device 28.
  • a perturbable light source (laser) generator 1 a plane mirror 2, half lenses 3 and 4
  • A0M acoustic optical modulator 5
  • SLM spatial optical modulator 15
  • focus adjustable lens combination 16-18 focus adjustable lens combination 16-18, focusing imaging surface 19-A, optical photosensitive material surface 19-B, autofocus system 20, beam opening and closing valve 21-A, reference light project
  • SLM is an image display that displays an image on the SLM and is illuminated with a laser beam.
  • the image reflected or penetrated by the SLM has the wavelength of the illuminating light and becomes an image that can be recorded on a specific light-sensitive material.
  • liquid crystal display LCD or digital micro-lens display DMD have this function.
  • This material is generally used for photomicrography of tiny circuits in the semiconductor industry. It can also be used as a light wave interference recording material. For example, if a hologram is made, interference fringes of object light and reference light are exposed on a photoresist sheet, and after chemical development, groove-shaped interference fringes having a fine uneven structure are formed. Or it can also use its photo-etching characteristics to record only the amplitude information of a certain pattern, that is, the strength, weakness, and depth distribution. The present invention uses this function to record diffraction gratings and micro-text.
  • UV-sensitive material Ultraviolet-sensitive Material
  • the present invention can also use ultraviolet laser to record information on a UV sensitive sheet. Since the resolution of the recorded information is inversely proportional to the wavelength of the light used, the ultraviolet laser can record a resolution higher than that achieved by ordinary visible light.
  • the invention can use this kind of material to record the amplitude information of the pattern, that is, the intensity distribution, so as to record the diffraction grating and small characters or patterns. And can record reflective integrated full-view stereo holography.
  • the method is to input a series of images of objects of various perspectives into a computer by digital transmission or scanning, and then display the series of images on the SLM one by one by computer, and use the focus-adjustable lens to project its image plane onto a 19-A imaginary plane or Infinity.
  • This image light wave and the reference beam from the reference light projector interfere with the silver halide photosensitive material to form a holographic element, and move the horizontal and vertical moving stage. Repeat this step to form a reflective integrated full-view stereo hologram. Provide a virtual three-dimensional image with a full perspective. Generally, this material needs to have a thickness of 10-25um (except for transparent support).
  • This material uses a low-molecular photoelectric effect to generate a bridging reaction to form a localized polymer and has a periodic density change to achieve the effect of diffracted light waves.
  • the present invention can use this material to record reflective integrated full-view stereo holography, and the recording method is as described above.
  • the connection between the computer control device and the machine is:
  • the pre-written software transmits signals, images and other data through the computer interface connector to completely control the operation of the entire system.
  • a serial port 1 transmits a pulse to open or close the beam opening and closing valve 21-A drive motor. .
  • digital data is transmitted to the horizontal and vertical mobile stations 25-26 via the serial port 5 to move the photosensitive material to the corresponding recording position corresponding to the image by moving a fixed amount of displacement. And through a parallel port or interface card to output a series of images displayed on the SLM.
  • the system control device 28 communicates with the beam opening / closing valve 21-A via its interface, the acoustic optical modulator 5, the diffuser plate 10 (including the drive motor control valve), the spatial optical modulator 15, the focus adjustable lens combination 16-18 ( Including drive motors), horizontal and vertical mobile stations 25-26, and other mobile control mechanisms are connected to perform overall control operations and calculations, and process the required output recorded images and digital information to achieve recording with special optical diffraction functions or It is suitable for the purpose of copying counterfeit optical media.
  • the accommodating rigid body 27 is a support body, and since the relative position of the component mechanism contained therein is strictly controlled, a total support body is required to maintain the relative position.
  • the accommodating rigid body 27 is connected to the autofocus system 20 having an up-and-down motion and an autofocus function.
  • the system support 24 supports the movement of the autofocus system 20.
  • the light beam generated by the interferable light source 1 is reflected by the plane mirror 2, it is divided into two light beams by the half lens 3.
  • the reflected light is a reference light beam, and the straight light is divided into two light beams by the half lens 4.
  • the straight light beam is used as A digital recording function light source, whose reflected light beam provides illumination power for the spatial optical modulator 15.
  • the light beam that has entered straight through the half lens 4 is split by the acoustic optical modulator 5 and is divided into a straight beam, a +1 diffraction beam and a 1 diffraction beam.
  • the straight-beam and the +1 or -1 diffracted beam are blocked by the light shielding plate 6, and the uninterrupted-1 or +1 beam reaches the pinhole mask 9 through the reflection flat mirrors 7, 8 and the pinhole mask 9
  • the image point image is focused and imaged by the lens combination 16-18 on the optical photosensitive material surface 19-B.
  • the optical intensity of this image is controlled by the digital and acoustic optical modulator 5 output by the computer to form exposure points with different depths of etching. After repeating the exposure and recording in this way, a digital hologram of optical diffraction can be obtained through development processing.
  • the light beam reflected by the half lens 4 passes through the diffusion plate 10 and diffuses the light beam through the 1/2 wavelength plate 12 and the 1/4 wavelength plate 14 to adjust the polarization direction of the diffused light wave.
  • the lens 11 focuses and images the light wave surface diffused by the diffuser plate 10 onto the spatial light modulator 15, which is equivalent to indirectly converting the image of the spatial light modulator 15 into a diffuse light wave surface, so as to facilitate another lens combination 16-18 and then This light wave is imaged on or near the photosensitive material surface 19-B.
  • This polarized light wave illuminates the image of the spatial light modulator 15 and is reflected.
  • the polarized light of the 1/4 wavelength plate 14 is reflected, it is reflected by the polarizing beam splitter 13 to the direction of the lens combination 16-18.
  • This image has now been transformed into an interfering light wave and focused by the lens to form an image on the surface of the optically sensitive material 19-B and the lens combination 16-18 near the lens position.
  • the light beam 21 separated by the half lens 3 is reflected on the optically sensitive material surface 19-B through the reference light reflector 22, and overlaps with the aforementioned image light beam on the optically sensitive material surface 19-B.
  • This overlapping exposure step records the interference fringes of the two beams into a holographic element.
  • the numerous holographic elements thus repeatedly recorded form an integrated hologram of a dot matrix.
  • the computer performs some simple and necessary processing on the original portrait.
  • the original portrait to be recorded as a digital image it is digitally calculated into digital data.
  • the original parallax portrait to be recorded as an integrated stereo hologram Some image processing such as deformation complement or color separation; for the original portrait to be recorded as a diffraction grating image, the raster pattern to be recorded is calculated according to the following formula:
  • Grating Pattern (x, y) 2R 2 0 2 ⁇ cos ⁇ - ⁇
  • the data will be output by the computer, and the computer will control each mechanism through its interface. First, turn off the beam opening and closing 21—A, and turn the diffuser plate 10, and then focus the SLM surface to the photosensitive material surface. At this time, a raster pattern is displayed on the SLM. The display time of this pattern is the exposure time. It is completely black and the exposure is complete. Then move the horizontal and vertical moving stages 25, 26 to the next exposure position, and then return to the process of displaying the next raster pattern to be recorded in SIM until the exposure is completed.
  • the computer first controls the diffuser plate 10 in the stopped state through the serial port 4, and adjusts the SLM surface to focus on the 19-A surface, and then displays a parallax image on the SLM surface and opens at the same time
  • the beam opening / closing valve 21-A makes the reference light interfere with the light wave projected on the material surface on the 19-A surface to form a holographic element, and then determines whether it is the last holographic element and decides to close the system or continue Exposure, if the exposure is continued, move the horizontal and vertical moving stage to the next exposure position, and return to the step of displaying the next parallax portrait to the SLM, until all the holographic elements are exposed.
  • the digital recording method is selected by the recording function, first stop the diffuser plate 10, display a black display on the SLM, and close the beam closing valve 21-A, and then pass the point image of the pinhole 9 through the adjustment lens Combining 16, 17 and focusing it on the 19-B plane, and then the value output by the computer determines the A0M5 diffraction +1 and -1, the presence and absence of the diffracted beam, and this step is equivalent to that of Figure 2 Digital information is output.
  • the presence or absence of this +1 beam determines the presence or absence of exposure points on the photosensitive material, and the strength of the +1 beam determines the depth of the unevenness of the exposure points on the photosensitive material, so that digital information can be recorded.
  • the digital signal is repeatedly output to A0M5 to determine the intensity and presence of the beam corresponding to the next exposure point.
  • a raster recording method with a planar or stereo optical diffraction effect the steps are: using a spatial optical modulator 15 to display a calculated optical intensity distribution image, and using a high-speed rotating diffuser plate 10 to convert an interference beam into The non-interferable light beam is illuminated on the image of the spatial optical tuner 15, and the amplitude distribution of the image is further reduced by an appropriate magnification through the focus adjustable lens combination 16-18, and is projected and imaged on the optical photosensitive material surface 19-B.
  • the high-speed rotation of the diffuser plate 10 is used to obtain instantaneous differently distributed light wave noises.
  • the averaging effect of differently distributed light wave noise intensities is used to reduce the inevitable light wave noises caused by interfering light sources.
  • the small beam elements recorded through the above steps are assembled into a large area raster pattern with special plane or stereo optical diffraction effects.
  • the diffuser plate 10 is rotated at high speed to eliminate light wave noise, and the optical intensity of the above image is exposed on the optically sensitive material surface 19-B to make it invisible to the naked eye. Tiny images or text that are difficult to reproduce with traditional holographic lamination exposure methods.
  • This hidden image or text does not have a diffractive optical function in a specific direction because it does not add any grating information of the diffractive function when it is recorded.
  • it When viewed with the naked eye, it only shows a random point; when it is copied with traditional holographic bonding exposure, its scattered light waves become object light, which will cover up the destruction of the original image or text, and only present a kind of noise information.
  • the copied optical medium can be identified by observing it through a magnifying glass or a microscope. Its image or text is reduced to about 2-6um, so it must be seen through a microscope more than 200 times. Once copied and exposed by counterfeiters, only meaningless noise appears on the copied material. This tiny image or text cannot be copied.
  • the spatial optical modulator 15 is closed via the system control device 28, and the focus can be adjusted by using Type lens combination 16-18, focusing and imaging the above pinhole image on the optical photosensitive material surface 19-B to expose a point Word phase information, then move the horizontal and vertical mobile stations 25, 26 to the next exposure position, so that an integrated digital phase type holographic information is recorded again and again.
  • the autofocus system adjusts its up and down position at any time to ensure Pinhole images are focused on the same surface.
  • different visual effects such as a raster pattern with a flat color conversion effect or holographic information with a three-dimensional effect
  • different exposure prevention functions such as a hidden pattern or tiny text, or a digital phase type hologram
  • the operation is simple.
  • the present invention can form a device with a composite optical element using a single-step operating system, which is different from a complex multi-step system in the conventional manner.
  • Kai Nuo holograms require a digital recording method using a single laser beam, and stereo images
  • the recording is performed by the image projection of the spatial light modulator, which combines different constituent elements in a diffraction grating, which can greatly improve its anti-counterfeiting function, and can easily make a diffraction grating with mechanical reading function, and With this device and method, anyone can easily make holographic images in various forms.
  • the holographic elements formed by the special reference light projector have no overlap with each other, which can avoid the interference of information between holographic elements, and there is no gap between adjacent elements, which greatly improves the visual quality of the product.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optics & Photonics (AREA)
  • Holo Graphy (AREA)

Description

绕射光栅记录装置及立体或平面影像的记录方法 技术领域
本发明涉及一种绕射光栅装置及其立体或平面影像的记录方法，具 体地说，涉及一种光学干涉图样的绕射光栅记录装置及其立体或平面影 像的记录方法。
背景技术
现有技术中，关于影像缩小投影以形成具有光学绕射效果的装置是 利用光学显示器显示后经复杂计算而得到的傅立叶转换信息影像，并将 其缩小投影成像到感光材料上， 以形成具有立体效果的全息， 用于商业 防伪。 这种方法及装置有很多不完善的地方， 如： 计算傅立叶转换信息 以形成平面或立体影像的方式将造成计算时间的浪费和计算信息的损 失， 且所形成的平面或立体影像与一般的全息合成方法并无明显的差 别， 容易被人一眼看穿而利用模造贴合曝光加以仿造， 此技术在防止假 冒上效果不理想。
另外关于光栅图像形成的方法而言，一般都是利用二光束聚焦于一 点以形成光栅元素的形式， 来集成为点矩阵式的光栅图像。此方式因二 光束入射自不同角度， 所以形成的干涉点为圆形或椭圆形， 易造成相邻 之间的空隙，并因为光束断面强度的分布不匀而造成光栅元素的光学绕 射强度的分布不均匀。加上光束断面的有限性， 其所形成的整体光栅图 像的精细度难以大幅提高。
为解决上述的缺点，一般用电子枪描绘系统来扫描每一光栅以记录 高解析度的光栅图像。 但是电子枪描绘系统价格较高， 维修十分复杂， 操作环境十分严格， 描绘速度较慢， 所使用的记录材料有别于一般的全 息记录材料， 故在结合传统的记录上有极大的困难。
发明内容
本发明的目的是提供一种绕射光栅及立体或平面影像的记录装置 及记录方法，它能为绕射光栅提供单一操作步骤并使用复合防伪机能记 录方法提高防伪效果。
为达到此发明目的， 本发明采用以下技术方案：
一种具有光学绕射效果的光学媒体记录装置， 其主要组成机构包 括： 可干扰光源发生器、 音响光学变调器、 扩散板、 针孔光罩、 1/2波 长板、 1/4波长板、 光束分离器、 空间光学变调器、 焦点可调节式透镜 组合、 自动对焦系统、 材料固定平台、 水平垂直方向移动台、 参考光投 射器、 系统控制装置、 光束开闭阀、 系统支持体，
其主要组成机构的连接互动关系如下：
系统控制装置经其界面接口与光束开闭阀、音响光学变调器、扩散 板、 空间光学变调器、 焦点可调节式透镜组合、 水平垂直方向移动台连 接， 进行统筹控制运作及计算， 处理所需输出记录的影像及数字信息， 以达到记录具有特殊光学绕射机能或具有不能以贴合曝光复制仿冒机 能的光学媒体的目的；
由音响光学变调器、扩散板、针孔光罩、 1/2波长板、 1/4波长板、 光束分离器、 空间光学变调器、焦点可调节式透镜组合等光学机件所组 成的体系放置于一受容刚体中， 以维持在运作过程中其相互之间的特定 结构关系，此受容刚体连接于具有上下运动和自动对焦机能的自动对焦 系统， 由系统支持体支持自动对焦系统的运动；
可干扰光源发生器、 系统支持体、 系统控制装置、 参考光投射器为 固定位置装置，水平垂直方向移动台带动材料固定平台移动到所欲曝光 的位置。
一种具有平面或立体光学绕射效果的光栅记录方法， 其特征在于： 利用空间光学变调器显示经计算所得的光学强度分布影像，并利用高速 旋转的扩散板将可干涉光束转变为非可干涉光束，照明在空间光学变调 器的影像上， 其影像的振幅分布再经由焦点可调节式透镜组合， 以适当 的倍率缩小， 投影成像到光学感光材料面上， 并利用高速旋转扩散板以 取得瞬间不同分布的光波杂讯， 在某一定的曝光期间内， 因不同分布的 光波杂讯强度的相加平均效果，减低因可干涉光源所产生的必然性光波 杂讯，经由上述步骤记录的微小光束元素集合而成一大面积的具有特殊 平面或立体光学绕射效果的光栅图样。
一种记录具有立体影像效果的方法， 其特征在于： 利用空间光学变 调器显示多视角的物体影像， 同时利用系统控制装置停止旋转扩散板， 以取得可干涉性的光束， 同时调整焦点可调节式透镜组合， 将上述的影 像投影到无限远处或投影到透镜与材料固定平台之间的聚焦成像面 上，并与来自相对于材料固定平台的相反方向由参考光投射器所导引而 来的另一可干涉光束互为干涉， 以形成一微小全息元素， 依次反复执行 曝光一系列的多视角影像， 以形成最终具有立体视觉效果的全息图像。 一种记录难以复制的微小隐藏式影像的方法， 其特征在于： 利用空- 间光学变调器显示欲隐藏的影像或文字，并利用焦点可调节式透镜组合 将此影像縮小投影成像到聚焦成像面上，同时高速旋转扩散板以消除光 波杂讯， 将上述影像的光学强度曝光在光学感光材料面上， 以制作非肉 眼可视、 难以用传统全息贴合曝光方式加以复制的防伪光学媒体。
一种记录数字位相型全息的方法， 其特征在于： 利用音响光学变调 器，将由系统装置所计算而得的数字灰阶情报转换成十 1次绕射光束的 强弱， 以控制浸蚀光点领域的深浅， 并经过针孔光罩的限制， 成为一定 直径的点状光源， 同时经由系统控制装置将空间光学变调器关闭， 并利 用焦点可调节式透镜组合，将上述的针孔影像聚焦成像到光学感光材料 面上， 以曝光成一点数字位相型情报， 再移动水平垂直方向移动台至下 一个曝光位置， 如此周而复始记录一个集成式数字位相型全息信息， 在 记录的全过程中， 自动对焦系统随时调整其上下位置以确保针孔影像聚 焦在同一面上。
附图概述
下面结合附图对本发明的具体实施方式作进一步详细的描述。
图 1是本发明各机械部件示意图；
图 2是电脑控制各部件完成影像记录的程序流程图；
图 3是计算机接口连接图；
图 4是数字影像记录方式图；
图 5是立体全息记录方式图；
图 6为光栅记录方式图。
本发明的最佳实施方式
请参阅图 1所示一种具有光学绕射效果的光学媒体记录装置，其机 构包括： 可千扰光源 (激光)发生器 1、 平面镜 2、 半透镜 3和 4、 音响 光学变调器 5 (简称 A0M)、 遮光板 6、 反射平镜 7和 8、 针孔光罩 9、 扩散板 10、透镜 11、 1/2波长板 12、光束分离器 13、 1/4波长板 14、 空间光学变调器 15 (简称 SLM)、焦点可调节式透镜组合 16-18、聚焦成 像面 19- A、光学感光材料面 19- B、自动对焦系统 20、光束开闭阀 21 - A、 参考光投射器 22、 材料固定平台 23、 系统支持体 24、 水平垂直方向 移动台 25-26、 受容刚体 27、 系统控制装置 28。 其中： SLM是一种影像显示器，将影像显示在 SLM上， 同时以激光束照明， 经由 SLM反射或穿透出的影像即有照明光的波长，成为可记录在特定感- 光材料的影像。一般如液晶显示器 LCD或数字微小镜片显示器 DMD均具 有此种功能。
感光材料有下列数种可供利用：
1 . 光阻
此种材料一般用在半导体工业上的微小电路的显微照相'，亦可用来 当做光波干涉记录材料。如制作全息， 将物体光及参考光的干涉条纹曝 光在光阻片上，经化学显影之后形成具有微细的凹凸构造的沟槽状干涉 条纹。或亦可利用其感光浸蚀的特性只记录某种图样的振幅讯息亦即强 弱深浅分布， 本发明利用此机能来记录绕射光栅及微小文
字或图样。
2 . UV感光材料（Ultraviolet- sensitive Material)
本发明亦可利用紫外线激光， 将信息记录在 UV感光片上， 因所记 录信息的解析度与所使用光波长成反比，所以利用紫外线激光可记录高 于一般可视光能达到的解析度。
3 . 卤化银感光材料
这是一种微粒型感光材料， 与一般的照相感光片相似， 但是其粒子 直径远小于一般的照相感光片， 所以其解析度可以高出 5-10倍左右以 记录高密度的干涉条纹。 本发明可利用此种材料记录图样的振幅讯息， 亦即强弱明暗分布， 以记录绕射光栅及微小文字或图样。 并且可以记录 反射型集成式全视角立体全息。其方法是将各视角的物体系列影像利用 数字传输或扫描方式输进电脑之后， 由电脑逐一显示系列影像到 SLM 上， 并利用焦点可调节透镜将其像面投射到 19- A 的假想面或无限远 处。 此影像光波与来自参考光投射器的参考光束干涉于卤化银感光材 料， 以形成一全息元素， 并移动水平垂直方向移动台， 反复执行此一步 骤， 最终形成一反射型集成式全视角立体全息， 提供一个虚拟的全方位 视角立体影像。 一般此种材料需具有 10- 25um厚度（除透明支持体外）。
4 . 高分子感光材料
此种材料是利用低分子的光电效应产生架桥反应形成局部性高分 子化而具有周期性密度变化以达到绕射光波的效果。本发明可利用此种 材料记录反射型集成式全视角立体全息， 其记录方式如前述。 其电脑控制装置与机件的连接情况是：
由预先撰写的软件透过电脑的界面联接器传输信号及影像等资 料， 以完全控制整个系统的运作， 其中由串行口 1传输一个脉冲以开启 或关闭光束开闭阀 21- A的驱动马达。
同理， 分别经由串行口 3及 4输出脉冲以分别开启或关闭焦点可 调节式透镜组合 16、 17的调整驱动马达及扩散板 10的驱动马达， 并 且经由串行口 2输出数字型资料给音响光学变调器 5 ， 以决定其开闭 状态。 并且经由串行口 5输送数字型资料给水平垂直方向移动台 25— 26， 以移动定量的位移来带动感光材料到对应于影像的所应记录位置。 并且经由并行口或界面联接卡输出一系列影像显示在 SLM上。
其主要组成机构的连接互动关系如下：
系统控制装置 28经由其界面接口与光束开闭阀 21— A、音响光学 变调器 5、 扩散板 10 (含驱动马达控制阀）、 空间光学变调器 15、 焦点 可调节式透镜组合 16― 18 (含驱动马达）、 水平垂直方向移动台 25― 26 等机动控制机构连接， 进行统筹控制运作及计算， 处理所需输出记 录的影像及数字信息， 以达到记录具有特殊光学绕射机能或具有不能以 贴合曝光复制仿冒机能的光学媒体的目的。
由半透镜 4、 音响光学变调器 5、 遮光板 6、 反射平镜 7和 8、 针 孔光罩 9、扩散板 10、透镜 11、 1/2波长板 12、光束分离器 13、 1/4 波长板 14、 空间光学变调器 15、焦点可调节式透镜组合 16-18等光学 机件所组合而成的体系放置于一受容刚体 27中， 以维持在运作过程中 其相互之间的特定结构关系， 受容刚体 27是一种支持体， 由于里面所 包容的元件机构的相对位置受到严谨的控制而需要一个维持此相对位 置的总支持体。 受容刚体 27连接于具有上下运动和自动对焦机能的自 动对焦系统 20， 由系统支持体 24支持自动对焦系统 20的运动。
可干扰光源 (激光)发生器 1、平面镜 2、半透镜 3、系统支持体 24、 系统控制装置 28、参考光投射器 22等为固定位置装置， 水平垂直方向 移动台 25-26带动材料固定平台 23移动到所欲曝光的位置。
由可干涉光源 1所产生的光束经平面镜 2反射后， 由半透镜 3分成 两道光束， 其反射光为参考光束， 其直进光又被半透镜 4 分成两道光 束， 其直进光束作为数字记录机能的光源， 其反射光束为空间光学变调 器 15提供照明电源。 经半透镜 4直进的光束受到音响光学变调器 5的分光，被分成直进 光束、 + 1绕射光束和一 1绕射光束。 其中直进光束以及 +1或一 1绕 射光束被遮光板 6遮断， 未被遮断的- 1或 +1光束则经反射平镜 7、 8 到达针孔光罩 9，针孔光罩 9的影像点像被由透镜组合 16-18聚焦成像 在光学感光材料面 19-B上。 此一点像的光学强度受到由电脑输出的数 字及音响光学变调器 5控制， 以形成不同深浅浸蚀的曝光点。如此反复 曝光记录之后， 经由显像处理， 可得到光学绕射的数字全息。
由半透镜 4反射的光束透过扩散板 10将光束扩散后经 1/2波长板 12及 1/4波长板 14调整扩散光波的偏光方向。 透镜 1 1将扩散板 10扩 散出来的光波面聚焦成像到空间光调制器 15上， 等于间接的将空间光 调制器 15的影像变换成一个扩散光波面， 以利另一透镜组合 16-18再 将此光波成像至感光材料面 19-B或其附近。 此偏光的光波照明空间光 调制器 15的影像后被反射， 又经 1/4波长板 14的偏光后， 被偏光分光 镜 13反射至透镜组合 16-18方向。 此影像至此已被变换成可干涉光波 并经透镜聚焦成像在光学感光材料面 19- B与透镜组合 16-18的中间靠 透镜位置。
另一方面， 由半透镜 3所分出的光束 21经参考光反射镜 22反射至 光学感光材料面 19- B 上， 与前述的影像光束重叠在光学感光材料面 19 - B上。 此一重叠曝光步骤将两光束的干涉条紋记录形成一全息元素。 如此反复记录的众多全息元素形成点矩阵的集成式全息。此曝光后的材 料经适当的显像处理后，在适当角度入射的照明光线下可观察到水平垂 直两方向视差的全方位立体图像。
请参阅图 2至图 6。本发明提供三种不同的记录方式， 分别叙述于 后：
首先电脑对原始的画像做一些简单且必要的处理，如对于欲记录为 数字型图像的原始画像， 则加以数字计算成数字型资料； 对于欲记录为 集成式立体全息的原始视差画像，则经过一些变形补位或分色等画像处 理； 对于欲记录为绕射光栅图像的原始画像， 则依下式计算其应记录的 光栅图样：
Grating Pattern(x,y)=2R202 · cos〔ΦΓ - ΦΟ〕
ΦΓ = 2 π / λ 〔sinC>rx + sin pr 〕
Φο = 2 π / λ 〔sin<I>ox + sin«i>oy〕 Where: R，0 - The amplitude of Reference beam and Objective beam, respectively,
λ - Intended playback wavelength ,
ΦΓΧ, ΦΓΥ - Intended illuminating angle for playback to X and Y
axis 'respectively,
Φοχ,Φογ - Intended playback angle to X and Y axis 'respectively. 如选择光栅记录方式， 则由电脑输出资料， 由电脑经其接口控制各 机件。 首先， 关闭光束开闭阔 21— A， 并转动扩散板 10，然后将 SLM 面聚焦成像至感光材料面上， 此时显示一光栅图样于 SLM， 此图样显示 时间即为曝光时间， 随后显示一全黑的显象， 曝光完毕。 随后移动水平 垂直方向移动台 25、 26至下一曝光位置，然后返回显示下一欲记录光 栅图样于 SIM的程序， 直至曝光完毕。
如选择集成式立体全息记录方式，则首先电脑经由串行口 4控制扩 散板 10在停止状态， 并调节 SLM面聚焦成像至 19- A面上， 然后显示一 视差画像在 SLM面上， 同时开放光束开闭阀 21- A， 令参考光与前述的 19 - A面上成像而投射至材料面上的光波干涉， 以形成一全息元素， 然 后判断是否为最后一全息元素而决定关闭系统或继续曝光，如果继续曝 光则将水平垂直方向移动台移至下一曝光位置，并返回执行显示下一视 差画像至 SLM的步骤， 直到全部全息元素曝光完毕。
如经记录机能选择的是数字记录方式， 则首先停止扩散板 10， 显 示出一全黑显象于 SLM， 并关闭光束幵闭阀 21-A , 然后将针孔 9的点 影像透过调节透镜组合 16、 17， 将之聚焦至 19- B面上， 继而由电脑 输出的数值来决定 A0M5绕射 +1及- 1， 绕射光束的有无及强弱， 此步骤 相当于附图 2 的输出一数位信息， 此 +1 光束的有无决定了感光材料上 曝光点的有无， 而且 +1 光束的强弱决定了感光材料上曝光点凹凸的深 浅， 如此可记录数字型信息。 待移动水平垂直方向移动台 25 、 26至 下一曝光点之后， 返复执行输出数字信息至 A0M5 以决定下一曝光点所 应对应的光束强弱及有无。
一种具有平面或立体光学绕射效果的光栅记录方法， 其步骤是： 利 用空间光学变调器 15以显示经计算所得的光学强度分布影像， 并利用 高速旋转的扩散板 10将可干涉光束转变为非可干涉光束， 照明在空间 光学变调器 15的影像上， 其影像的振幅分布再经由焦点可调节式透镜 组合 16- 18， 以适当的倍率缩小， 投影成像到光学感光材料面 19- B上， 并利用高速旋转扩散板 10以取得瞬间不同分布的光波杂讯， 在某一定 的曝光期间内， 因不同分布的光波杂讯强度的相加平均效果， 减低因可 干涉光源所产生的必然性光波杂讯，经由上述步骤记录的微小光束元素 集合而成一大面积的具有特殊平面或立体光学绕射效果的光栅图样。
一种依图 1所述的装置记录具有立体影像效果的方法， 其步骤是： 利用空间光学变调器 15以显示多视角的物体影像， 同时利用系统控制 装置 28停止旋转扩散板 10， 以取得可干涉性的光束， 同时调整焦点可 调节式透镜组合 16-18，将上述的影像投影到无限远处或投影到透镜 18 与材料固定平台 23之间的聚焦成像面 19- A上，并与来自相对于材料固 定平台 23的相反方向由参考光投射器 22所导引而来的另一可干涉光束 互为干涉， 以形成一微小全息元素， 依次反复执行曝光一系列的多视角 影像， 以形成最终具有立体视觉效果的全息图像。
一种依图 1所述的装置记录难以复制的微小隐藏式影像的方法，其 步骤是： 利用空间光学变调器 15显示欲隐藏的影像或文字， 并利用焦 点可调节式透镜组合 16-18将此影像縮小投影成像到聚焦成像面 19-A 上， 同时高速旋转扩散板 10以消除光波杂讯， 将上述影像的光学强度 曝光在光学感光材料面 19-B上， 以制作非肉眼可视、 难以用传统全息 贴合曝光方式加以复制的微小影像或文字。
此隐藏式影像或文字，因本身在被记录时不加任何绕射机能的光栅 讯息， 所以不具特定方向的绕射光学机能。 以肉眼观察时， 它只呈现一 乱射的点； 以传统全息贴合曝光复制时， 因其乱射光波成为物体光， 会 遮盖破坏原有影像或文字的清晰度而只呈现一种杂讯情报在被复制的 光学媒体上， 经由放大镜或显微镜观察， 结果即可判别出来。 其影像或 文字被缩小成大约 2- 6um，所以必须透过大约 200倍以上的显微镜方能 看到， 一旦被仿冒者贴合曝光复制的时候， 被复制的材料片上只出现无 意义杂讯而无法将此微小影像或文字复制。
一种依图 1所述的装置记录数字位相型全息的方法， 其步骤是： 利 用音响光学变调器 5， 将由系统装置 28所计算而得的数字灰阶情报转 换成 +1 次绕射光束的强弱， 以控制浸蚀光点领域的深浅， 并经过针孔 光罩 9 的限制， 成为一定直径的点状光源， 同时经由系统控制装置 28 将空间光学变调器 15关闭， 并利用焦点可调节式透镜组合 16-18 , 将 上述的针孔影像聚焦成像到光学感光辑料面 19-B上， 以曝光成一点数 字位相型情报， 再移动水平垂直方向移动台 25 、 26至下一个曝光位 置， 如此周而复始记录一个集成式数字位相型全息信息， 在记录的全过 程中， 自动对焦系统随时调整其上下位置以确保针孔影像聚焦在同一面 上。
本发明将不同视觉效果，如具有平面颜色变换效果的光栅图样或具 有立体效果的全息信息， 与具有不同防止贴合曝光机能， 如隐藏式图样 或微小文字， 或数字位相型全息等， 透过系统控制装置精细的适当配 置， 记录在同一光学媒体上， 以形成一种特殊的兼具可依目视判别及机 器判读机能的多重防伪的光学媒体。
工业应用性
本发明具有以下优点：
1 . 操作简单， 本发明可用单一步骤操作系统的复合光学元件形成 装置， 有别于传统方式的复杂多步系统。
2 . 易于变换操作系统或同时复合两种操作方式于制作同一绕射光 栅， 以求得不同效果的组成元素， 如开诺全息相片的制作需要使用单一 雷射光束的数字记录方式，而立体影像的记录则以空间光调制器的影像 投影来执行， 将不同的组成元素集合于一个绕射光栅， 能大幅提高其防 止假冒的机能， 并能轻易制作出机械辨读机能的绕射光栅， 并且依此装 置及方法任何人可轻易制作各种不同形态的全息图像.
3 . 可以非常简单地将微小图样或文字记录在具有立体或绕射机能 光栅领域以外的任意部分， 或与之重叠， 利用其不可贴合曝光复制的光 学特性大幅度提高防伪的特性。
4 . 特殊的参考光投射器形成的全息元素其相互间并无重叠， 能避 免全息元素之间的信息干扰，并且相邻元素之间没有空隙而大幅提高成 品的视觉品质。

Claims

权 利 要 求
1 . 一种具有光学绕射效果的光学媒体记录装置， 其主要组成 机构包括： 可干扰光源发生器、 音响光学变调器、 扩散板、 针孔光 罩、 1/2波长板、 1/4波长板、 光束分离器、 空间光学变调器、 焦 点可调节式透镜组合、 自动对焦系统、 材料固定平台、 水平垂直方 向移动台、 参考光投射器、 系统控制装置、 光束开闭阀， '
其主要组成机构的连接互动关系如下：
系统控制装置经其界面接口与光束幵闭阀、 音响光学变调器、 扩散板、 空间光学变调器、 焦点可调节式透镜组合、 水平垂直方向 移动台等机动控制机构连接， 进行统筹控制运作及计算， 处理所需 输出记录的影像及数字信息， 以达到记录具有特殊光学绕射机能或 具有不能以贴合曝光复制仿冒机能的光学媒体的目的；
由音响光学变调器、 扩散板、 针孔光罩、 1/2波长板、 1/4波 长板、 光束分离器、 空间光学变调器、 焦点可调节式透镜组合等光 学机件所组合而成的体系放置于一受容刚体中， 以维持在运作过程 中其相互之间的特定结构关系， 此受容刚体连接于具有上下运动和 自动对焦机能的自动对焦系统， 由系统支持体支持自动对焦系统的 运动；
可干扰光源发生器、 系统支持体、 系统控制装置、 参考光投射 器等为固定位置装置， 水平垂直方向移动台带动材料固定平台移动 到所欲曝光的位置。
2 . 一种具有平面或立体光学绕射效果的光栅记录方法，其特征 在于： 利用空间光学变调器以显示经计算所得的光学强度分布影 像， 并利用高速旋转的扩散板将可干涉光束转变为非可干涉光束， 照明在空间光学变调器的影像上， 其影像的振幅分布再经由焦点可 调节式透镜组合， 以适当的倍率缩小， 投影成像到光学感光材料面 上， 并利用高速旋转扩散板以取得瞬间不同分布的光波杂讯， 在某 一定的曝光期间内， 因不同分布的光波杂讯强度的相加平均效果， 减低因可干涉光源所产生的必然性光波杂讯， 经由上述步骤记录的 微小光束元素集合而成一大面积的具有特殊平面或立体光学绕射效 果的光栅图样。
3 . 一种依权利要求 1 所述的装置记录具有立体影像效果的方 法， 其特征在于： 利用空间光学变调器以显示多视角的物体影像， 同时利用系统控制装置停止旋转扩散板， 以取得可干涉性的光束， 同时调整焦点可调节式透镜组合， 将上述的影像投影到无限远处或 投影到透镜与材料固定平台之间的聚焦成像面上， 并与来自相对于 材料固定平台的相反方向由参考光投射器所导引而来另一可干涉光 束互为干涉， 以形成一微小全息元素， 依次反复执行曝光 系列的 多视角影像， 以形成最终具有立体视觉效果的全息图像。
.一种依权利要求 1所述的装置记录难以复制的微小隐藏式影 像的方法， 其特征在于： 利用空间光学变调器显示欲隐藏的影像或 文字， 并利用焦点可调节式透镜组合将此影像缩小投影成像到聚焦 成像面上， 同时高速旋转扩散板以消除光波杂讯，将上述影像的光学 强度曝光在光学感光材料面上， 以制作非肉眼可视、 难以用传统全 息贴合曝光方式加以复制的防伪光学媒体。
5 . 一种依权利要求 1所述的装置记录数字位相型全息的方法， 其特征在于： 利用音响光学变调器， 将由系统装置所计算而得的数 字灰阶情报转换成 +1 次绕射光束的强弱，以控制浸蚀光点领域的深 浅， 并经过针孔光罩的限制， 成为一定直径的点状光源， 同时经由 系统控制装置将空间光学变调器关闭， 并利用焦点可调节式透镜组 合， 将上述的针孔影像聚焦成像到光学感光材料面上， 以曝光成一 点数字位相型情报， 再移动水平垂直方向移动台至下一个曝光位 置， 如此周而复始记录一个集成式数字位相型全息信息， 在记录的 过程中， 自动对焦系统随时调整其上下位置以确保针孔影像聚焦在 同一面上。
6 . 依权利要求 1、 2、 3、 4、 5所述的装置与方法， 其特征 在于： 将不同视觉效果， 如具有平面颜色变换效果的光栅图样或具 有立体效果的全息信息， 具有不同防止贴合曝光机能， 如隐藏式图 样或微小文字， 或数字位相型全息等， 透过系统控制装置精细的适 当配置， 记录在同一光学媒体上， 以形成一种特殊的兼具可依目视 判别及机器判读机能的多重防伪的光学媒体。
PCT/CN1999/000181 1998-11-04 1999-11-04 Dispositif d'enregistrement pour reseau de diffraction et procede d'enregistrement d'image tridimensionnelle ou bidimensionnelle WO2000026702A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP99953521A EP1132758A4 (en) 1998-11-04 1999-11-04 RECORDING DEVICE FOR BENDING GRIDS AND RECORDING METHOD FOR SPATIAL OR LEVEL IMAGES
AU10267/00A AU1026700A (en) 1998-11-04 1999-11-04 Recording device for diffraction grating and method of recording stereo or planeimage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN98124663.X 1998-11-04
CN98124663 1998-11-04

Publications (1)

Publication Number Publication Date
WO2000026702A1 true WO2000026702A1 (fr) 2000-05-11

Family

ID=5228746

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1999/000181 WO2000026702A1 (fr) 1998-11-04 1999-11-04 Dispositif d'enregistrement pour reseau de diffraction et procede d'enregistrement d'image tridimensionnelle ou bidimensionnelle

Country Status (3)

Country Link
EP (1) EP1132758A4 (zh)
AU (1) AU1026700A (zh)
WO (1) WO2000026702A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115004219A (zh) * 2020-01-07 2022-09-02 Oppo广东移动通信有限公司 调整获取图像的方法和电子装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA007874B1 (ru) * 2005-02-24 2007-02-27 Александр Григорьевич Полещук Устройство для записи дифракционных элементов
EP4091759A1 (en) * 2021-05-19 2022-11-23 Boegli-Gravures S.A. A device and a method for optical engraving of a diffraction grating on a workpiece

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408656A (en) * 1966-05-18 1968-10-29 Eastman Kodak Co Method and appartus for recording composite diffraction grating pattern
JPH097216A (ja) * 1995-06-22 1997-01-10 Sanyo Electric Co Ltd 光ピックアップ装置
WO1997046898A1 (en) * 1996-06-07 1997-12-11 The Regents Of The University Of California Holographic optical grating and method for optimizing monochromator configuration

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4675702A (en) * 1986-03-14 1987-06-23 Gerber Scientific Inc. Photoplotter using a light valve device and process for exposing graphics
JPH0484686A (ja) * 1990-07-27 1992-03-17 Advantest Corp レーザ加工装置
US5229872A (en) * 1992-01-21 1993-07-20 Hughes Aircraft Company Exposure device including an electrically aligned electronic mask for micropatterning
JPH09243964A (ja) * 1996-03-14 1997-09-19 Sony Corp 露光照明装置
US5986781A (en) * 1996-10-28 1999-11-16 Pacific Holographics, Inc. Apparatus and method for generating diffractive element using liquid crystal display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408656A (en) * 1966-05-18 1968-10-29 Eastman Kodak Co Method and appartus for recording composite diffraction grating pattern
JPH097216A (ja) * 1995-06-22 1997-01-10 Sanyo Electric Co Ltd 光ピックアップ装置
WO1997046898A1 (en) * 1996-06-07 1997-12-11 The Regents Of The University Of California Holographic optical grating and method for optimizing monochromator configuration

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1132758A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115004219A (zh) * 2020-01-07 2022-09-02 Oppo广东移动通信有限公司 调整获取图像的方法和电子装置

Also Published As

Publication number Publication date
EP1132758A4 (en) 2007-02-14
EP1132758A1 (en) 2001-09-12
AU1026700A (en) 2000-05-22

Similar Documents

Publication Publication Date Title
US5986781A (en) Apparatus and method for generating diffractive element using liquid crystal display
EP2306251B1 (en) Hologram generating device and hologram printer
EP0064067B2 (en) Method for generating a diffractive graphical composition
US9541900B2 (en) Method for producing a beam shaping holographic optical element
Lu et al. Compact, reliable asymmetric optical configuration for cost-effective fabrication of multiplex dot matrix hologram in anti-counterfeiting applications
US6268893B1 (en) Method and apparatus for a fringe direct writing system
EP1282016B1 (en) Recording surface relief microstructure
WO2000026702A1 (fr) Dispositif d&#39;enregistrement pour reseau de diffraction et procede d&#39;enregistrement d&#39;image tridimensionnelle ou bidimensionnelle
US20020191237A1 (en) Hologram forming melthod
EP2015295A1 (en) Hologram element, hologram element fabricating apparatus, hologram element fabricating method, and hologram reconstructing apparatus used for reconstructing information
JP2803434B2 (ja) 回折格子プロッター
JP3673959B2 (ja) ホログラムの作製方法
JP3448964B2 (ja) ホログラフィック・ステレオグラムの作成方法
JP2000250389A (ja) 偽造防止媒体
Bulanovs Digital holographic recording in amorphous chalcogenide films
JP3380838B2 (ja) 転写用回折素子の製造方法、及びそれを用いた回折素子パネルの製造方法
JPH08314361A (ja) ホログラフィ装置
CN1132026C (zh) 绕射光栅记录装置及立体或平面影像的记录方法
JP2011257445A (ja) ホログラフィックステレオグラム作成装置
Matsushima et al. Fabrication of High-Definition CGH
JPH06332360A (ja) グレーティング光素子およびそれを用いたリップマンタイプホログラフィックステレオグラム合成装置
JPH07281584A (ja) ホログラフィ技術を利用した転写方法及び装置
JPH11202742A (ja) ホログラム複製用原版及びホログラムの複製方法
JPH06332361A (ja) レインボータイプカラーホログラフィックステレオグラムの原画作製方法およびレインボータイプカラーホログラフィックステレオグラム合成装置

Legal Events

Date Code Title Description
ENP Entry into the national phase

Ref country code: AU

Ref document number: 2000 10267

Kind code of ref document: A

Format of ref document f/p: F

AK Designated states

Kind code of ref document: A1

Designated state(s): AU CA JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 09582844

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 1999953521

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999953521

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1999953521

Country of ref document: EP