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大口径高功率激光装置为提高激光靶面的光强强度,通常采用2×2集束聚焦的模式进行打靶.大口径楔形透镜是组成2×2集束聚焦系统的核心元件,可分为二维离轴楔形透镜、一维离轴楔形透镜和非离轴楔形透镜3类.为了获得理想靶面光强分布,基于这3类楔形透镜,对比研究相应2×2集束聚焦系统下的靶面光强分布特性.研究结果表明:相比离轴楔形透镜,采用基于非离轴楔形透镜的2×2集束聚焦系统时,容易在激光靶面获得更窄的主瓣宽度、更强的峰值强度、更高的能量集中度.研究结果对高功率激光靶场聚焦系统的配置选择有重要参考价值.
Large-aperture high-power laser device to improve the intensity of the laser target surface, usually using 2 × 2 cluster focusing mode for targeting large-diameter wedge lens is composed of 2 × 2 cluster focusing system core components can be divided into two-dimensional Axis wedged lens, one-dimensional off-axis wedged lens and non-off-axis wedged lens 3. In order to obtain the ideal intensity distribution of the target, based on these three types of wedged lens, the comparative study of the corresponding 2 × 2 focusing system focused light intensity The results show that, compared with the off-axis wedges, when the 2 × 2 focusing system based on non-off-axis wedged lens is adopted, narrower main lobe width, stronger peak intensity and more High energy concentration.The research results have important reference value for the configuration selection of high power laser range focusing system.