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    • 12. 发明申请
    • Alternating Beam Laser Imaging System with Reduced Speckle
    • 交替光束激光成像系统减少斑点
    • US20120013852A1
    • 2012-01-19
    • US12835037
    • 2010-07-13
    • Mark ChampionMark O. FreemanAlban N. LescureMarkus Duelli
    • Mark ChampionMark O. FreemanAlban N. LescureMarkus Duelli
    • G02B27/48G02B26/10G03B21/14
    • G02B26/101G02B27/104G02B27/145G02B27/48H04N9/3129H04N9/3164
    • An imaging system (200) is configured to reduce perceived speckle in images (201) produced by the imaging system. The imaging system (200) includes one or more laser source pairs (205,206), with each laser source pair being configured to produce two beams (209,210) of a color. A spatial light modulator (211) is configured to produce the images (201) with light (212) from the source pairs by scanning the light (212) in a raster pattern (213) along a projection surface (202). A beam translator (225) is configured to cause lines of successive sweeps of the raster pattern (213) to be scanned with the two beams (221,222) on an alternating basis such that a line scanned by a first of the two beams in one sweep is scanned by a second of the two beams in a sequentially subsequent sweep. Other optical elements can introduce angular diversity to further reduce speckle, such as a beam shifter (2200) and a light translation element (990).
    • 成像系统(200)被配置为减少由成像系统产生的图像(201)中的感觉到的斑点。 成像系统(200)包括一个或多个激光源对(205,206),每个激光源对被配置为产生颜色的两个光束(209,210)。 空间光调制器(211)被配置为通过沿着投影表面(202)以光栅图案(213)扫描光(212)来从源对产生具有光(212)的图像(201)。 光束转换器(225)被配置为使交替的基础上的两个光束(221,222)扫描光栅图案(213)的连续扫描线,使得由一个扫描中的两个光束中的第一个扫描的行 在顺序的后续扫描中由两个光束中的第二个扫描。 其他光学元件可以引入角度分集以进一步减少斑点,例如光束移动器(2200)和光转换元件(990)。