Apparatus and method for frequency conversion and mixing of laser light
    3.
    发明授权
    Apparatus and method for frequency conversion and mixing of laser light 失效
    用于激光的频率转换和混合的装置和方法

    公开(公告)号:US06763042B2

    公开(公告)日:2004-07-13

    申请号:US10017162

    申请日:2001-12-14

    IPC分类号: H01S330

    摘要: A method and device for the nonlinear combination of laser light which produces a beam of uniform intensity, high spatial purity, and high conversion efficiency. The method includes emitting a laser light from a tunable distributed feedback fiber laser having both thermal and piezoelectric control elements which produces a laser light at a given frequency, wavelength, and intensity; converting the laser light in a nonlinear resonator which uses a nonlinear optical crystal for frequency conversion or mixing; and measuring the resonant frequency of the nonlinear resonator and adjusting the laser light frequency using both the thermal and piezoelectric elements of the fiber laser light source to match the resonant frequency conditions within the nonlinear resonator.

    摘要翻译: 一种用于激光的非线性组合的方法和装置,其产生均匀强度,高空间纯度和高转换效率的光束。 该方法包括从具有产生以给定频率,波长和强度的激光的热和压电控制元件的可调分布反馈光纤激光器发射激光; 在使用非线性光学晶体进行频率转换或混合的非线性谐振器中转换激光; 并测量非线性谐振器的谐振频率,并使用光纤激光光源的热和压电元件调整激光频率,以匹配非线性谐振器内的谐振频率条件。

    Reduction of speckle and interference patterns for laser projectors
    8.
    发明授权
    Reduction of speckle and interference patterns for laser projectors 失效
    减少激光投影机的斑点和干涉图案

    公开(公告)号:US07193765B2

    公开(公告)日:2007-03-20

    申请号:US11097462

    申请日:2005-03-31

    IPC分类号: G02F1/01

    CPC分类号: G02B27/48 H04N9/3129

    摘要: The invention provides a system and method for reducing laser speckle and interference patterns in a laser projector display when using a laser projector having a spatial light modulator (SLM) with a defined pixel rate. The method can include the operation of polarizing a laser output of a continuous wave laser such that the laser output is s-polarized with respect to a beam combiner. The s-polarized laser output can be divided into a first laser beam and a second laser beam. A phase of the second laser beam can be modulated with an amplitude sufficient to create a phase delay of approximately half a wavelength of the laser output and at a frequency at least twice that of the SLM's pixel rate.

    摘要翻译: 本发明提供一种用于在使用具有定义像素速率的空间光调制器(SLM)的激光投影仪时减少激光投影仪显示器中的激光散斑和干涉图案的系统和方法。 该方法可以包括使连续波激光器的激光输出偏振的操作,使得激光输出相对于光束组合器是s偏振的。 s偏振激光输出可以分为第一激光束和第二激光束。 第二激光束的相位可以以足以产生激光输出的大约一半波长的相位延迟并且以至少是SLM的像素速率的两倍的频率进行调制。

    System and method for reduction of image artifacts for laser projectors
    10.
    发明申请
    System and method for reduction of image artifacts for laser projectors 失效
    用于减少激光投影机图像伪影的系统和方法

    公开(公告)号:US20080080054A1

    公开(公告)日:2008-04-03

    申请号:US11541154

    申请日:2006-09-29

    IPC分类号: G02B5/18

    CPC分类号: G02B27/46 H04N9/3129

    摘要: A system and method is disclosed for reducing visibility of image artifacts caused by diffractive elements in a laser projector having a structured diffractive device. At least two diffracted orders of light can be selected from light emitted from the structured diffractive device using a spatial light filter. The polarization of at least one of the selected diffracted orders can be changed with respect to another selected diffracted order. The selected diffracted order can be recombined to form an image having reduced visible image artifacts.

    摘要翻译: 公开了一种用于降低由具有结构化衍射装置的激光投影仪中的衍射元件引起的图像伪像的可见性的系统和方法。 可以使用空间光滤波器从结构化衍射装置发射的光中选择至少两个衍射光。 所选择的衍射阶数中的至少一个的极化可以相对于另一选择的衍射级而改变。 所选择的衍射顺序可以重新组合以形成具有减少的可见图像伪影的图像。