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1.发明授权Apparatus and method for reducing spatial coherence and for improving uniformity of a light beam emitted from a coherent light source 失效用于减小空间相干性并改善从相干光源发射的光束的均匀性的装置和方法
公开(公告)号：US6081381A
公开(公告)日：2000-06-27
申请号：US178783
申请日：1998-10-26
摘要： A method and apparatus for elimination of speckle pattern in optical system by reducing coherence. The invention is based on the use of a rotating microlens array having a rotational speed chosen with reference to laser parameter. For a continuous laser this relationship consists in that the exposure time is sufficient for overlapping at least 10.sup.4 spot sizes of the speckle. For a pulse laser, the laser pulse time should be sufficient for shifting the speckle spot at least by the magnitude of its diameter. Several embodiments with modified coherence reduction units are available. One modified embodiment describes a rotating inclined plate which enhances coherence reduction by scanning the over the surface of the diffuser. Another embodiment describes the use of an optical conical rod with total internal reflection for creation of a plurality of non-coherent light sources.
摘要翻译： 一种减少相干性消除光学系统中散斑图案的方法和装置。 本发明基于使用具有参考激光参数选择的旋转速度的旋转微透镜阵列。 对于连续激光，这种关系在于曝光时间足以重叠斑点的至少104个斑点大小。 对于脉冲激光器，激光脉冲时间应足以使散斑至少等于其直径的大小。 具有修改的相干减少单元的几个实施例是可用的。 一个修改的实施例描述了一种旋转的倾斜板，其通过扫描扩散器的表面来增强相干性降低。 另一实施例描述了使用具有全内反射的光学圆锥形棒来产生多个非相干光源。
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2.发明授权Optical beam shaper and method for spatial redistribution of inhomogeneous beam 失效光束整形器和不均匀光束空间再分布的方法公开(公告)号：US06407870B1
公开(公告)日：2002-06-18
申请号：US09429775
申请日：1999-10-28
IPC分类号： G02B1308
CPC分类号： G02B19/0057 , G02B19/0014 , G02B27/09 , G02B27/0961 , G02B27/0966
摘要： An optical system comprising a first array of individual beam shaping elements and a second array of beam shaping elements placed between a light source, e.g., a linear array of individual laser diodes and a reshaped beam receiver, e.g., an optical fiber cable. The inhomogeneous beams emitted from the laser diodes are passed in sequence through the first and second stages so that the first stage reshaped the cross section of the beam, e.g., in the fast-axis direction and the second stage reshapes the cross section of the beam, e.g., in the slow-axis direction. As a result, the output beams of the system may have a cross section reshaped to any desired configuration, e.g., suitable for inputting into the optical fiber cable and having divergences individually adjusted in mutually perpendicular directions.
摘要翻译： 一种光学系统，包括单独的光束整形元件的第一阵列和放置在光源（例如单个激光二极管的线性阵列）和重新成形的光束接收器（例如光纤电缆）之间的光束整形元件的第二阵列。 从激光二极管发射的不均匀光束依次通过第一和第二级，使得第一级重新形成光束的横截面，例如在快轴方向上，并且第二阶段重塑光束的横截面 ，例如，在慢轴方向。 结果，系统的输出光束可以具有重新成形为任何所需配置的横截面，例如适于输入到光纤电缆中并具有在相互垂直的方向上分别调节的发散。
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