摘要
为了探究光学元件的调试对全息光栅条纹所产生的影响,运用ASAP光学软件对双光束干涉光路中的激光器、分束镜、反射镜、扩束镜、准直镜和干板进行位置、形状与尺寸建模,光学特性赋予和光线追迹仿真。干板相干能量分布结果表明,各元件光学面中心等高、共轴且扩束镜和准直镜共焦时,激光波长和光路夹角的改变会导致条纹间隔相应变化,分光比的增加会导致条纹对比度下降;反射镜与扩束准直系统不共轴将导致条纹倾斜且对比度下降;扩束镜和准直镜不共焦时,条纹将变成圆弧形。这与理论分析或通过CCD观察到的实验现象相符,说明ASAP仿真调试的可信度高,对于避免因光学元件调整不到位而造成条纹不理想具有现实指导意义,可参考借鉴到全息光栅制作光路的实际调试过程中。
In order to study the influence of optical element adjustments on holographic grating fringes,ASAP was used to define positions,geometries,sizes and optical properties for the plant which includes laser,beam splitter,mirrors,beam expanders,collimating lens and holographic plate. It was also used to trace rays and then analyze the coherent energy distribution on the plate. Results show that when each element＇s optical surface center is at the same height,coaxial,also the beam expander and the collimating len is confocal,the fringe interval varies with the wavelength and the two optical path angle,the fringe contrast decrease while the beam splitting ratio increases. Non-coaxial mirror leads to fringe inclination and contrast decline. Once beam expanders and collimating lens are not confocal,fringes will change from straight to arc. Theoretical analysis and CCD observations under the laboratory circumstance are consistent with above ASAP simulation. Hence the simulation shows high credibility,has realistic guiding significance on avoid unexpected fringes resulting from incorrect optical element adjustments,and can be a reference to the actual holographic grating fabrication optical path adjustments.
出处
《实验室研究与探索》
CAS
北大核心
2016年第5期91-96,共6页
Research and Exploration In Laboratory
基金
2013~2017年教育部高等学校光电信息科学与工程专业教学指导分委员会全国高校光电专业教育教学热点难点第二批教研项目(2014[010]-12)
2013年浙江省高等教育教学改革项目(JG2013005)
关键词
信息光学
全息光栅
光学软件
光路调试
干涉条纹
information optics
holographic grating
optical software
optical path adjustment
interference fringe
