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发明授权
CN101916045B 一种用于双偶极均匀照明的自由曲面透镜 失效 - 权利终止

一种用于双偶极均匀照明的自由曲面透镜
摘要：
本发明公开了一种用于双偶极均匀照明的自由曲面透镜。它包括前表面平面、后表面自由曲面和侧面圆柱面，前表面平面与后表面自由曲面通过侧面圆柱面相连接，前表面平面垂直于激光光束传播方向，后表面自由曲面用于偏折激光光束；后表面自由曲面包括第一自由曲面、第二自由曲面、第三自由曲面、第四自由曲面和圆柱面，第一自由曲面、第二自由曲面、第三自由曲面与第四自由曲面通过圆柱面相连接，激光光束经第一自由曲面和第二自由曲面偏折，在目标面上的照明区域对应双偶极均匀照明中的内环，激光光束经第三自由曲面和第四自由曲面偏折，在目标面上的照明区域对应双偶极均匀照明中的外环；本发明结构紧凑、简单；整形效果好，能量利用率高。
摘要（英）：

The invention discloses a free-form surface lens for quadripole uniform illumination. The lens comprises a front surface plane, a back surface free-form surface and a side face cylindrical surface, wherein the front surface plane is connected with the back surface free-form surface through the side face cylindrical surface; the front surface plane is vertical to a laser beam propagation direction; the back surface free-form surface is used for deflecting laser beams and comprises a first free-form surface, a second free-form surface, a third free-form surface, a fourth free-form surface and acylindrical surface; the first free-form surface, the second free-form surface, the third free-form surface and the fourth free-form surface are connected with one another through the cylindrical surface; the laser beams are deflected through the first free-form surface and the second free-form surface and an illumination area on a target surface corresponds to an inner ring in the quadripole uniform illumination; and the laser beams are deflected through the third free-form surface and the fourth free-form surface and the illumination area on the target surface corresponds to an outer ring in the quadripole uniform illumination. The lens has the advantages of compact and simple structure, good reshaping effect and high energy utilization ratio.

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