紫外三元复合消色差相位延迟器优化设计的分析  

Analysis on Optimization Design of an Ultraviolet Three-in-one Composite Achromatic λ/4 Wave-Plate

作　　者：郭丽娇[1] 吴福全[1] 尹延学[1] 王庆[1] 孙远新[2] 

机构地区：[1]曲阜师范大学激光研究所,山东省曲阜市273165 [2]北京师范大学宁江区附属中学,吉林省松原市138000

出　　处：《曲阜师范大学学报（自然科学版）》2009年第4期55-58,共4页Journal of Qufu Normal University(Natural Science)

摘　　要：为了设计在紫外波段消色差性能优良的三元复合λ/4波片,根据复合波片理论,利用同一波长(300nm)的2个λ0/4波片和1个λ0/2波片组合成复合波片,研究了复合波片的相位延迟量随波长的变化,得出复合波片在250-350nm的光谱范围内是消色差的;在此基础上对三元复合消色差λ/4波片进行了优化设计,即通过改变中间波片的相位延迟量和精确调整复合角,使消色差范围拓宽到200-400nm,相位延迟计算偏差在5%左右.通过改变中间波片的材料,即氟化镁晶体代替石英晶体,用上述同样方法设计出UVC波段消色差λ/4波片,其相位延迟计算偏差在2%以内.这种优化设计对拓宽紫外波段消色差范围,提高延迟量精度具有实用价值.In order to design a high-quality ultraviolet composite achromatic λ/4 wave-plate, the composite wave-plate theory was applied to make a composite achromatic λ/4 wave-plate constituted by two λ0/4 wave-plates and a λ0/2 wave-plate with the same wavelength of 300 nm. By studying the theoretical curve between the composite wave-plate＇s phase retardation and the wavelength, this composite wave-plate was proved to be achromatic within the spectrum scope of 250-350 nm. Then an optimization design of the above composite achromatic wave-plate was put forward, which was clone by changing the phase retardation of the middle wave-plate and adjusting the composite angle, the achromatic scope was enlarged to 200-400 nm, and the phase retardation variation was decreased to be about 5%. Moreover, with the same method an UVC super achromatic λ/4 wave-plate was designed, while changing the material of the middle wave-plate： quartz replaced by MgF2. And its phase retardation variation was found to be within 2%. This kind of optimization design was proved to be quite valuable in enlarging the ultraviolet achromatic scope and exacting the phase retardation.

关 键 词：偏振光学 紫外 消色差 复合波片 相位延迟量 复合角 

分 类 号：O436.3[机械工程—光学工程]