Optical design of 1.06μm pulse laser expanding system with high rate variable focus
Optical design of 1.06μm pulse laser expanding system with high rate variable focus
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发表时间：
2007
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通讯作者：
Sun Hua-yan
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作者：
Sun Hua-yan
远距离激光主动探测系统对扩展系统的工作范围的扩展能力和跟踪性能提出了严格的要求。分析和设计了一种1.06μm脉冲激光扩展光学系统。采用折射率变焦和二极管背向反射相结合的双步扩展系统。该系统可将激光束远场发散角减小至0.1 mrad，将输出光束加宽130 mm以上，并在一定准直性能的基础上实现了1.5 ~ 50倍的高速变焦扩展范围。在这种情况下，该系统既能满足扫描和搜索的要求，又能随距离的变化进行跟踪和检测。
The active laser detecting system of far distance makes strict demands on the expanding ability and tracking performance of the operation range of the expanding system.A 1.06μm impulse laser expanding optical system is analyzed and designed.And a double-step expanding system,which combines the refractive zoom and diode abaxial reflecting,is adopted.This system can reduce the far field divergence angle of the laser beam to 0.1 mrad and widen the output beam over 130 mm.Moreover,the 1.5 to 50 times′ range of high-rate variable focus of the expanding is achieved based on some collimation performance.And in this circumstance,the system can meet the demand of scanning and searching,also tracking and detecting with the distance changing.