激光损伤光学玻璃的微区透过率研究  

Micro-transmittance detection of optic glasses damaged by laser

作　　者：谭勇[1] 蔡红星[1] 张喜和[1] 金光勇[1] 张宇[1] 高勋[1] 刘丽炜[1] 

机构地区：[1]长春理工大学理学院,吉林长春130022

出　　处：《激光与红外》2011年第12期1351-1354,共4页Laser & Infrared

基　　金：国家"973"项目;国家科技攻关课题项目(No.2007BA107A00-1)支持资助

摘　　要：激光微小光斑损伤光学玻璃,其损伤区域的线径仅几百微米,用传统方法很难测试其透过率。本文提出一种微区透过率测试方法和算法,用透镜将金相显微镜和光纤光谱仪耦合成一套测试设备,该测试设备在定量分析损伤区域大小和形貌的同时,检测此区域损伤前后的透射光谱曲线,并利用算法计算光谱透过率。最终,根据光谱透过率获得激光损伤光学玻璃的阈值。Area of optical glass damaged by laser is only several hundred microns. Its transmittance detection is difficult with common method. A kind of new test and algorithm is reported in this paper. A metallographic microscope and an optical fiber spectrometer are mixed into a test system with lenses. The system is useful to quantitatively analyze the damaged micro-area and morphology. At the same time ,the transmittance spectra of the micro-area can be tested before and after damage. These spectra are calculated to gain the transmittance. At last, the damage threshold is obtained by spectrum transmittance.

关 键 词：显微 光谱透过率 微区检测 损伤阈值 光学玻璃 

分 类 号：O432[机械工程—光学工程]