Dual-wavelength optical pickup head
    1.
    发明授权
    Dual-wavelength optical pickup head 有权
    双波长光学拾音头

    公开(公告)号:US06211511B1

    公开(公告)日:2001-04-03

    申请号:US09227678

    申请日:1999-01-08

    IPC分类号: H10J4014

    摘要: A dual-wavelength holographic laser module is provided. The dual-wavelength holographic laser module includes a holographic optical element (HOE), a multiple-element photodetector, and a laser light source that can produce a laser light with a wavelength that has, for example, two desired quantities. The laser light emitted from the laser light source with a desired wavelength can travel through the HOE and an objective lens unit, which is used to focus the laser light onto an optical disk of the DVD system, the CD system, or the CD-R system, depending on which wavelength quantity is chosen. The objective lens unit includes a single lens with a changeable NA quantity or a two-lens system that can be switched to put one lens at a time in the optical path. The optical disk reflects the laser light back to the HOE along the same light path. The reflected laser light is diffracted by the HOE to reach to the multiple-element photodetector. The photodetector receives the reflected laser light to obtain a signal, which is used for focusing and tracking, and further reads the information in the DVD system, the CD system, or the CD-R system. The laser light has a single light path even though the laser light can have two different wavelength quantities.

    摘要翻译: 提供双波长全息激光模块。 双波长全息激光器模块包括全息光学元件(HOE),多元件光电探测器和能产生具有例如两个所需量的波长的激光的激光光源。 从激光光源发射的具有所需波长的激光可以穿过HOE和物镜单元,该物镜单元用于将激光聚焦到DVD系统,CD系统或CD-R的光盘上 系统,取决于选择的波长数量。 物镜单元包括具有可变NA量的单透镜或双透镜系统,该双透镜系统可以在光路中一次将一个透镜切换。 光盘将激光沿相同的光路反射回HOE。 反射的激光被HOE衍射以到达多元件光电探测器。 光电检测器接收反射的激光以获得用于聚焦和跟踪的信号,并进一步读取DVD系统,CD系统或CD-R系统中的信息。 即使激光可以具有两个不同的波长数量,激光也具有单个光路。

    Robust and versatile focus/tracking method and system for optical pickup heads
    2.
    发明授权
    Robust and versatile focus/tracking method and system for optical pickup heads 失效
    强大的多功能聚焦/跟踪方法和系统的光学拾音头

    公开(公告)号:US06377520B2

    公开(公告)日:2002-04-23

    申请号:US09063946

    申请日:1998-04-21

    IPC分类号: G11B700

    摘要: A focus/tracking method and system is provided for use in an optical drive with a possibly multiple-wavelength laser source for control of the focus/tracking of the pickup head of the optical drive. The use of a multiple-wavelength laser source allows the optical drive to read data from various types of optical discs. The focus/tracking method and system combines the use of a differential, dual optical channel method for focusing control of the laser beam used to read data from the optical disc and the use of the single-beam tracking method for tracking control of the same. The focus error signal and the tracking error signal can be obtained from the same set of multi-element photodetectors. The structure of the system can therefore be simplified to include a reduced number of constituent components thus allowing a reduction in manufacturing cost.

    摘要翻译: 提供了一种用于具有可能的多波长激光源的光学驱动器中的焦点/跟踪方法和系统,用于控制光学驱动器的拾取头的聚焦/跟踪。 使用多波长激光源允许光驱从各种类型的光盘读取数据。 聚焦/跟踪方法和系统结合了使用差分双光道方法来聚焦用于从光盘读取数据的激光束的控制,以及使用单光束跟踪方法来跟踪其控制。 聚焦误差信号和跟踪误差信号可以从同一组多元件光电探测器获得。 因此,可以将系统的结构简化为包括减少数量的组成部件,从而允许降低制造成本。

    Multiple-beam holographic optical pick-up head
    4.
    发明授权
    Multiple-beam holographic optical pick-up head 失效
    多光束全息光学拾光头

    公开(公告)号:US06369377B1

    公开(公告)日:2002-04-09

    申请号:US09615412

    申请日:2000-07-13

    IPC分类号: G11B700

    CPC分类号: G11B7/1353 G11B7/14

    摘要: The present invention discloses a multiple-beam holographic optical pick-up head, which has the advantages of the multiple-beam optical pick-up head and the holographic optical pick-up head and can increase the light usage efficiency. This invention uses the property that a polarized diffractive optical element can generate different optical effects for laser beam with different polarizations and places a polarized multiple-beam grating and polarized hologram on the optical path for splitting the incident light toward the disc into multiple reading beams by the multiple-beam grating. The returning laser beams reflected from the disc are diffracted and diverted by the hologram to reach a photodetector. Both the incident and reflective beams are diffracted once only; thus the light usage efficiency can be increased.

    摘要翻译: 本发明公开了一种多光束全息光学拾波头,其具有多光束拾取头和全息光学拾取头的优点,可以提高光的使用效率。 本发明使用偏振衍射光学元件可以对具有不同偏振度的激光束产生不同光学效应的特性,并且在光路上放置偏振多光束光栅和偏振全息图,以将入射光朝向盘分离为多个读取光束 多光束光栅。 从盘反射的返回激光束被全息图衍射并转移到光电检测器。 入射光束和反射光束都被衍射一次; 从而可以提高光的使用效率。

    Active polarization switch for speckle reduction in laser projection sources
    5.
    发明授权
    Active polarization switch for speckle reduction in laser projection sources 有权
    激光投影光源减少斑点的主动偏振开关

    公开(公告)号:US08567957B2

    公开(公告)日:2013-10-29

    申请号:US13179828

    申请日:2011-07-11

    IPC分类号: G03B21/14 G02F1/1335 H04N3/02

    摘要: A laser-based imaging system (200) is configured to reduce perceived speckle in images (201). The imaging system (200) includes one or more laser sources (207), a light modulator (204) configured to produce the images (201) with light (205) from the laser sources (207), and one or more active polarization switches (206) disposed in an optical path of the imaging system (200). The active polarization switch (206) is configured to alternate a polarization orientation of the light in synchrony with an image refresh cycle of the system. The active polarization switch can be clocked in accordance with a clocking angle to optimize speckle reduction. Additionally, one or more light preconditioners (991,992) may be used to help optimize speckle reduction.

    摘要翻译: 基于激光的成像系统(200)被配置为减少图像中感知到的斑点(201)。 成像系统(200)包括一个或多个激光源(207),配置成用来自激光源(207)的光(205)产生图像(201)的光调制器(204)和一个或多个有源极化开关 (206)设置在成像系统(200)的光路中。 主动偏振开关(206)被配置为与系统的图像刷新周期同步地交替光的偏振取向。 主动偏振开关可以按照时钟角计时,以优化散斑减少。 另外,一个或多个光预处理器(991,992)可用于帮助优化散斑减少。

    Electronic alignment of primary color pixels in a scanned display
    6.
    发明授权
    Electronic alignment of primary color pixels in a scanned display 有权
    扫描显示屏中原色像素的电子对齐

    公开(公告)号:US08223161B2

    公开(公告)日:2012-07-17

    申请号:US11843577

    申请日:2007-08-22

    IPC分类号: G09G5/36

    摘要: An image generation apparatus provides correction for color offsets. Color offsets may be caused by misalignments in laser diodes or optics assemblies in a laser projector. The offsets may be measured during or after manufacture of the laser projector. An image buffer is responsive to the offset data to translate each color plane separately. The image buffer may include separately addressable portions for each color. Further, variable delay elements on the output of the image buffer may provide color offset correction. Interpolation provides further offset correction.

    摘要翻译: 图像生成装置提供彩色偏移的校正。 颜色偏移可能是由于激光二极管或激光投影机中的光学组件中的未对准引起的。 可以在制造激光投影仪期间或之后测量偏移。 图像缓冲器响应于偏移数据以分别转换每个色平面。 图像缓冲器可以包括用于每种颜色的单独可寻址部分。 此外,图像缓冲器的输出上的可变延迟元件可以提供颜色偏移校正。 内插提供进一步的偏移校正。

    Diffractive optical element having periodically repeating phase mask and system for reducing perceived speckle
    7.
    发明授权
    Diffractive optical element having periodically repeating phase mask and system for reducing perceived speckle 有权
    具有周期性重复相位掩模的衍射光学元件和用于减少感觉到的斑点的系统

    公开(公告)号:US08152307B2

    公开(公告)日:2012-04-10

    申请号:US12643914

    申请日:2009-12-21

    摘要: A optical apparatus (201) for use in an laser imaging system (200) is provided. The optical apparatus (201) includes one or more optical elements (215) that are configured to create an intermediate image plane (217) in the laser imaging system (200). A diffractive optical element (216) is then disposed at the intermediate image plane (217) to reduce speckle. The diffractive optical element (216) includes a periodically repeating phase mask (218) that can be configured in accordance with steps, vortex functions, Hermite-Gaussian functions, and so forth. Smooth grey-level phase transitional surface (337) can be placed between elements (333,334) to improve brightness and image quality. The periodically repeating phase mask (218) makes manufacture simple by reducing alignment sensitivity, and can be used to make applicable safety standards easier to meet as well.

    摘要翻译: 提供一种用于激光成像系统(200)的光学装置(201)。 光学装置(201)包括被配置为在激光成像系统(200)中产生中间像平面(217)的一个或多个光学元件(215)。 然后将衍射光学元件(216)设置在中间像平面(217)处以减少斑点。 衍射光学元件(216)包括可根据步骤配置的周期性重复相位掩模(218),涡旋函数,Hermite-高斯函数等。 可以将平滑的灰度级相位过渡表面(337)放置在元件(333,334)之间,以提高亮度和图像质量。 周期性重复相位掩模(218)通过降低对准灵敏度使制造变得简单,并且可以用于使适用的安全标准更容易满足。

    Scanning Projector with Dynamic Scan Angle
    8.
    发明申请
    Scanning Projector with Dynamic Scan Angle 有权
    具有动态扫描角度的扫描投影机

    公开(公告)号:US20120069415A1

    公开(公告)日:2012-03-22

    申请号:US12887886

    申请日:2010-09-22

    IPC分类号: G02B26/10

    摘要: A scanning projector includes a MEMS device with a scanning mirror that sweeps a beam in two dimensions. Actuating circuits receive scan angle information and provide signal stimulus to the MEMS device to control the amount of mirror deflection on two axes. The period of movement on one or both axes may be modified to effect changes in line density in a resultant display.

    摘要翻译: 扫描投影仪包括具有扫描镜的MEMS装置,其在两个维度上扫描光束。 激励电路接收扫描角度信息并向MEMS器件提供信号激励以控制两个轴上的镜面偏转量。 可以修改一个或两个轴上的运动周期,以在所得到的显示中实现线密度的变化。

    Wide field of view head-up display system
    10.
    发明授权
    Wide field of view head-up display system 有权
    宽视场平视显示系统

    公开(公告)号:US07777960B2

    公开(公告)日:2010-08-17

    申请号:US12424129

    申请日:2009-04-15

    申请人: Mark O. Freeman

    发明人: Mark O. Freeman

    IPC分类号: G02B27/10 G09G5/00

    摘要: A projection system, such as a system suitable for head-up displays in automobiles, includes a laser projection source (101) and a scanner (102). Light from the laser projection source (101) is scanned across a projection surface (104), which can be a car's windshield. The projection surface (104) includes a buried numerical aperture expander (105) capable of reflecting some light and transmitting other light. The system may also include an image projection source (551) capable of presenting high-resolution images on a sub-region (552) of the projection surface (604) that has a optical relay (650) disposed therein.

    摘要翻译: 诸如适用于汽车中的平视显示器的系统的投影系统包括激光投影源(101)和扫描仪(102)。 来自激光投射源(101)的光被扫描穿过可以是汽车的挡风玻璃的投影表面(104)。 投影表面(104)包括能够反射一些光并透射其他光的埋入式数值孔径扩展器(105)。 该系统还可以包括能够在其中设置有光学继电器(650)的投影表面(604)的子区域(552)上呈现高分辨率图像的图像投影源(551)。