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31. 发明授权

US06323970B1 Method of producing switchable holograms 失效
标题翻译：生产可切换全息图的方法
公开(公告)号：US06323970B1
公开(公告)日：2001-11-27
申请号：US09670414
申请日：2000-09-26
申请人： Milan M. Popovich
发明人： Milan M. Popovich
IPC分类号： G02B532
CPC分类号： G02B5/32 , G02F1/13342 , G03H2001/0417
摘要： A method of producing a switchable hologram generally comprises providing a substrate comprised of a liquid crystal material and having two generally opposed surfaces and recording a plurality of holographic fringes composed of liquid crystal droplets in the substrate with one or more of the plurality of holographic fringes positioned such that a surface of the fringes is angled relative to one of the substrate surfaces. The substrate is subjected to an electrical field during recording of the holographic fringes. The electrical field varies across the surface of the substrate so that the liquid crystal droplets are all oriented generally in a common direction.
摘要翻译：一种制造可切换全息图的方法通常包括提供由液晶材料构成并具有两个大体上相对的表面的基片，并且将多个由液晶微滴组成的全息条纹记录在基片中，所述多个全息条纹中的一个或多个位于使得条纹的表面相对于一个衬底表面成角度。在记录全息条纹期间，基板经受电场。电场在基板的表面上变化，使得液晶小滴全部都沿共同的方向取向。

32. 发明授权

US06191876B1 Light diffusion control by electrically reconfigurable holographic optical elements 失效
标题翻译：通过电子可重构全息光学元件进行光扩散控制
公开(公告)号：US06191876B1
公开(公告)日：2001-02-20
申请号：US09351049
申请日：1999-07-09
申请人： Milan M. Popovich
发明人： Milan M. Popovich
IPC分类号： G02B532
CPC分类号： G02F1/13476 , G02B5/32 , G02F1/13342
摘要： A system and a method of displaying projected images on a projection screen of the system include one or more reconfigurable holographic optical elements (HOEs) in the screen to optically manipulate the projected images impinging on the screen. The reconfigurable HOEs may be configured to perform simple optical functions that are commonly associated with traditional optical devices, such as lenses, prisms and mirrors. However, the reconfigurable HOEs may also be configured to perform sophisticated optical manipulations, such as varying angular intensity of diffused light toward predefined viewing regions. Each reconfigurable HOE includes a hologram that is sandwiched between two electrode layers. The hologram is a holographic photopolymeric film that has been combined with liquid crystal. The hologram has an optical property that changes in response to an applied electrical field. The reconfigurable HOEs are utilized to control the diffusing characteristic of the projection screen. The diffusing characteristic can be changed by selectively setting one or more reconfigurable HOEs to a diffractive state. In one application, the reconfigurable HOEs are utilized to optimally diffuse the projected images with respect to light intensity, so that the projected images appear to be uniformly bright to multiple observers at different viewing regions. In another application, the reconfigurable HOEs are utilized to display the projected images in a stereoscopic form.
摘要翻译：在系统的投影屏幕上显示投影图像的系统和方法包括屏幕中的一个或多个可重新配置的全息光学元件（HOE），以光学地操纵冲击在屏幕上的投影图像。可重构HOE可以被配置为执行通常与诸如透镜，棱镜和反射镜的传统光学装置相关联的简单光学功能。然而，可重新配置的HOE还可以被配置为执行复杂的光学操作，例如朝向预定义的观看区域改变漫射光的角度强度。每个可重新配置的HOE包括夹在两个电极层之间的全息图。全息图是已经与液晶结合的全息光聚合物膜。全息图具有响应于所施加的电场而改变的光学特性。可重构的HOE用于控制投影屏幕的漫射特性。可以通过选择性地将一个或多个可重新配置的HOE设置为衍射状态来改变漫射特性。在一个应用中，可重构的HOE用于相对于光强度最佳地扩散投影图像，使得投影图像看起来在不同观看区域的多个观察者均匀地亮起。在另一应用中，可重新配置的HOE用于以立体形式显示投影图像。

33. 发明授权

US6115151A Method for producing a multi-layer holographic device 失效
标题翻译：多层全息装置的制造方法
公开(公告)号：US6115151A
公开(公告)日：2000-09-05
申请号：US469712
申请日：1999-12-21
申请人： Milan M. Popovich
发明人： Milan M. Popovich
IPC分类号： G02B5/32 , G03H1/02 , G03H1/30 , G03H1/08 , G03H1/18 , G03H1/26
CPC分类号： G03H1/0256 , G03H1/0402 , G03H1/30 , G02B5/32 , G03H2225/23 , G03H2250/32
摘要： A method of making a holographic device comprising sensitizing a plurality of layers and stacking the layers to form a composite structure. Each layer is sensitized to at least one color wavelength. The method further includes directing at least two laser beams at the composite structure. Each of the laser beams is oriented at an angle with respect to an incident surface of the composite structure such that the laser beams intersect one another within one of the layers of the composite structure. The laser beams are moved along the layer to create interference patterns in the sensitized layer.
摘要翻译：一种制造全息装置的方法，包括对多个层进行敏化并层叠以形成复合结构。每层对至少一种颜色波长敏感。该方法还包括以复合结构引导至少两个激光束。每个激光束相对于复合结构的入射表面成一角度定向，使得激光束在复合结构的一个层内彼此相交。激光束沿着该层移动以在致敏层中产生干涉图案。

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