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中文摘要：
为了在基本不改变光学干涉器件尺寸的条件下提高静态光谱分析设备的光谱分辨率,在分析了各种提高静态干涉系统光程扫描范围方法的基础上,设计了基于电光调制沃拉斯顿棱镜组的光学干涉系统。系统采用沃拉斯顿棱镜组的光学结构,计算了其相应的光程差函数,同时,又利用电光调制技术对晶体折射率进行调制,并推导了一个调制周期内的光程差变化范围,最后给出了系统的综合光程差函数及光谱分辨率。实验采用三块尺寸、结构角都一致的沃拉斯顿棱镜构成沃拉斯顿棱镜组,通过SGT-3型声光调制器调制信号。结果显示,经消冗余处理后干涉条纹图像可有效融合,调制后的干涉图像虽略有畸变,但经线性校正后满足光谱分布函数还原的要求。相比同尺寸的静态干涉系统而言,光谱分辨率提高了近一个数量级。
英文摘要：
Under the condition of no substantial change in the crystal size of the optical interference device, in order to improve the static spectrum resolution of the spectrum analysis equipment, the optical interference system of electro-optic modulation was designed. Wollaston prism group was used on the basis of analysis of the methods for increasing scanning range of the optical path of the static interference system. In the meantime, crystal refractive index was modulated by electro-optic modulation tech- nique, and the range of the optical path difference was derived. Finally, the synthesized optical path difference function and spec- trum resolution of the system was given in a modulation cycle. Experiments used three Wollaston prisms with same size and structural angle to constitute Wollaston prism group, and the signal was modulated by type SGT-3 acousto-optic modulator de- vices. Experimental results show that the interference fringes image after eliminating redundant processing can be effectively fused. Modulated interference image has a little distortion, but meets the requirements to reduce the spectrum distribution func- tion after linearity correction. The spectrum resolution increased nearly by an order of magnitude compared to the static interfer- ence with the same crystal size.
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