Diffractive optical element
    1.
    发明授权
    Diffractive optical element 失效
    衍射光学元件

    公开(公告)号:US5073007A

    公开(公告)日:1991-12-17

    申请号:US536177

    申请日:1990-06-11

    IPC分类号: G02B5/18

    CPC分类号: G02B5/1876 Y10S359/90

    摘要: There is disclosed a diffractive optical element and a method to produce same wherein the element comprises a base and at least one phase zone comprising an arbitrary multiplicity M of steps of generally identical step height, wherein M is not a power of 2. The method includes the steps of defining a basic depth unit equivalent to a zone height divided by M, defining a depth sequence of N depths wherein N is the smallest integer greater than log.sub.2 M such that each of the M steps can be produced by at least one linear combination of the N depths, defining N masks herein each mask enables the optical element to be processed to one of the N depths and wherein for each mask, the steps to be processed are those which have the one of the N depths in its linear combination and serially utilizing each of the N masks for processing of the optical element.

    摘要翻译: 公开了一种衍射光学元件及其制造方法,其中该元件包括一个基底和至少一个相位区域,该相位区域包括大致相同步长的步骤的任意多重M,其中M不是2的幂。该方法包括 定义相当于区域高度除以M的基本深度单位的步骤,定义N深度的深度序列,其中N是大于log2M的最小整数,使得每个M步骤可以通过至少一个线性组合 N个深度,这里定义N个掩模使得能够将光学元件处理为N个深度中的一个,并且其中对于每个掩模,要处理的步骤是具有其线性组合中的N个深度中的一个并且串行地 利用每个N个掩模来处理光学元件。

    Passive hidden imaging
    2.
    发明申请
    Passive hidden imaging 审中-公开
    被动隐藏成像

    公开(公告)号:US20040156081A1

    公开(公告)日:2004-08-12

    申请号:US10361623

    申请日:2003-02-11

    申请人: Holo-Or Ltd.

    摘要: In a secure imaging system for securing documents or encrypting images, an image comprises an array of printed positions formed using a group of inks each having a predetermined spectrum. The positions are selected to form a predetermined image, either real or virtual, when the image is viewed through an optical processor. An image formed using inks having the same colors as experienced by the human eye, but not sharing exactly the same spectra, will fail to form the correct predetermined image.

    摘要翻译: 在用于保护文档或加密图像的安全成像系统中,图像包括使用一组具有预定光谱的一组墨水形成的打印位置阵列。 当通过光学处理器观看图像时,选择这些位置以形成预定的图像,无论是真实的还是虚拟的。 使用具有与人眼经验相同的颜色但不共享完全相同的光谱的油墨形成的图像将不能形成正确的预定图像。

    Diffractive optical element
    4.
    发明授权
    Diffractive optical element 失效
    衍射光学元件

    公开(公告)号:US5227915A

    公开(公告)日:1993-07-13

    申请号:US722372

    申请日:1991-06-25

    IPC分类号: G02B5/18

    CPC分类号: G02B5/1876

    摘要: A diffractive optical element and a method to produce same is disclosed. The optical element comprises a base and at least first and second phase zones wherein the first phase zone comprises a first multiplicity of steps and the second phase zone comprises a second multiplicity of steps and wherein the first multiplicity and the second multiplicity of steps are different. The method to produce the diffractive optical element of the present invention includes the step of defining a collection of masks for creating stepped phase zones wherein at least one of the collection of masks partially masks out at least one phase zone such that the at least one phase zone will be partially etched.

    摘要翻译: 公开了一种衍射光学元件及其制造方法。 光学元件包括基底和至少第一和第二相位区域,其中第一相位区域包括第一多个步骤,并且第二相位区域包括第二多个步骤,并且其中第一多重步骤和第二多个步骤是不同的。 制造本发明的衍射光学元件的方法包括限定用于产生阶梯相区的掩模的集合的步骤,其中至少一个掩模集合部分地掩蔽出至少一个相位区,使得至少一个相位 区域将被部分蚀刻。

    Intrusion detector
    5.
    发明授权
    Intrusion detector 失效
    入侵检测器

    公开(公告)号:US5712622A

    公开(公告)日:1998-01-27

    申请号:US588380

    申请日:1996-01-18

    IPC分类号: G08B13/193 G08B13/18

    CPC分类号: G08B13/193

    摘要: An infrared detector including a sensor which provides an output signal responsive to infrared radiation incident on a face thereof, and a diffractive optical element which directs a substantial portion of incident visible radiation away from the sensor and which has substantially no diffractive effect on incident infrared radiation.

    摘要翻译: 一种包括传感器的红外检测器,该传感器提供响应入射在其表面上的红外辐射的输出信号;以及衍射光学元件,其将大部分入射的可见光辐射远离传感器并且对入射的红外辐射基本上没有衍射效应 。