Intrusion detector
    1.
    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 。

    Multi-beam optical pickup
    3.
    发明授权
    Multi-beam optical pickup 失效
    多光束光学拾音器

    公开(公告)号:US06411573B1

    公开(公告)日:2002-06-25

    申请号:US09027313

    申请日:1998-02-20

    IPC分类号: G11B700

    CPC分类号: G11B7/1353 G11B7/14

    摘要: An optical pickup for simultaneously reading a plurality of data tracks of an optical storage medium is provided. The optical pickup uses a diffractive element to split an illumination beam into a plurality of reading beams which are projected onto a plurality of tracks of the optical storage medium. Apparatus and methods are shown for improving the optical characteristics of the optical pickup by reducing vignetting, optical aberrations, and field curvature. These improvements are achieved by relocating the diffractive element at a greater distance from the laser source, so that a diffractive element having a larger period, and a smaller angle between diffractive orders may be used. The apparatus and methods shown also reduce the number of components and the manufacturing cost of the optical pickup.

    摘要翻译: 提供了用于同时读取光存储介质的多个数据轨道的光学拾取器。 光学拾取器使用衍射元件将照明光束分成投影到光学存储介质的多个轨道上的多个读取光束。 示出了通过减少渐晕,光学像差和场曲率来改善光学拾取器的光学特性的装置和方法。 这些改进是通过将衍射元件与激光源相距更远的位置重新定位而实现的,从而可以使用具有较大周期的衍射元件和衍射级之间较小的角度。 所示的装置和方法也减少了光学拾取器的部件数量和制造成本。

    Lighting module for indoor farming

    公开(公告)号:US11564358B2

    公开(公告)日:2023-01-31

    申请号:US17298763

    申请日:2019-12-29

    摘要: A lighting module for illuminating cultivated crops in indoor farming comprises at least one monolithic efficiency enhancing optical element (EEOE) further comprising: (a) a front portion comprising a spectrum conversion layer; (b) an optically transparent middle body portion having at least one light source embedded there within and configured to emit spectrally controllable radiation; and (c) a back portion configured to reflect the radiation emitted by the spectrum conversion layer to the cultivated crops. The back portion has a central area being adjacent to the optically transparent middle body portion configured for reflecting radiation propagating within the optically transparent middle body portion and a peripheral area configured for reflecting radiation emerged from the optically transparent middle body portion via the side surface.

    Method and apparatus for generating focus error signals in a multi-beam optical disk drive
    6.
    发明授权
    Method and apparatus for generating focus error signals in a multi-beam optical disk drive 失效
    用于在多光束光盘驱动器中产生聚焦误差信号的方法和装置

    公开(公告)号:US06229771B1

    公开(公告)日:2001-05-08

    申请号:US09169212

    申请日:1998-10-09

    IPC分类号: G11B7095

    摘要: A focus detection system for use in a multi-beam optical pickup assembly is provided that uses an optical element, either a holographic element or diffractive element, to split beams reflected off of a data-bearing surface of an optical disk into a plurality of data beams and a plurality of focus beams. The optical element also introduces astigmatism into the focus beams. The focus beams are projected onto focus detectors configured to account for overlap between adjacent focus beams to produce an accurate focus error signal.

    摘要翻译: 提供了一种用于多光束光学拾取器组件的焦点检测系统,其使用全息元件或衍射元件的光学元件将从光盘的数据承载表面反射的光束分成多个数据 光束和多个聚焦光束。 光学元件还将焦散射入聚焦光束。 聚焦光束被投影到被配置成考虑相邻聚焦光束之间重叠的焦点检测器,以产生准确的聚焦误差信号。