CAJ | 학술논문

针对普通焦距测量方法无法对单脉冲高能激光热畸变引起的焦斑轴向位置漂移进行测量的问题，设计了一种由正交双楔板组分束、可实现瞬时焦斑位置测量的光斑列阵检测系统。两组垂直放置的楔板反射镜组对汇聚光束进行空间分束调制，不同光束具有不同汇聚位置。这些光束最终被探测器接收，形成尺寸不同、阵列分布的光斑阵列。通过对光斑阵列的单次探测，实现了多种轴向焦斑位置变化量的获取及单发次高能激光脉冲系统的焦斑漂移测量。经过理论分析、软件模拟及具体实验验证，该测量系统具有测量范围与测量精度可调、光斑离散性好、杂散光影响小等特点。
침대보통초거측량방법무법대단맥충고능격광열기변인기적초반축향위치표이진행측량적문제，설계료일충유정교쌍설판조분속、가실현순시초반위치측량적광반렬진검측계통。량조수직방치적설판반사경조대회취광속진행공간분속조제，불동광속구유불동회취위치。저사광속최종피탐측기접수，형성척촌불동、진렬분포적광반진렬。통과대광반진렬적단차탐측，실현료다충축향초반위치변화량적획취급단발차고능격광맥충계통적초반표이측량。경과이론분석、연건모의급구체실험험증，해측량계통구유측량범위여측량정도가조、광반리산성호、잡산광영향소등특점。
To tackle the problem that traditional focus measure technologies cannot measure the focus shifting caused by thermal distortion in single pulse high power laser system, a system, composed with double vertical wedge groups producing array spots, can make instantly focus measure available. Two pairs of wedge- mirror groups which are placed vertically to each other are utilized as beam splitting system in this system. All those rays are finally detected by a detector, and formed a matric of spots with various sizes. Through single detection of spots matrix, various focus position shifts and the focus shifting measurement of the high power laser with single shot are obtained. After theoretical analyzing, software simulating and experiment testing, this technique has the advantages such as the adjustable detecting accuracy and range, good disperse quality, and the ability of restraining the effect of parasitic light.