| 光学学报, 2022, 42 (24): 2423001, 网络出版: 2022-12-14 狭缝离轴校正透射式光谱仪谱线弯曲 下载： 612次Correction of Spectral Line Curvature of Transmission Spectrometers By Off-Axis SlitGet PDFFull Text图表MetricsMore 武志昆 1,2,3,4石恩涛 1,3,4王咏梅 1,2,3,4,*郭宝泽 1,2,3,4
作者单位 1 中国科学院国家空间科学中心，北京 1001902 中国科学院大学，北京 1000493 天基空间环境探测北京市重点实验室，北京 1001904 中国科学院空间环境态势感知技术重点实验室，北京 100190
光学器件 成像光谱仪 准直镜 谱线弯曲 畸变补偿 optical devices imaging spectrometer collimator spectral line curvature distortion compensation AI词云图 AI语音精读 AI语音超短摘要【AI生成本文一句话精读】：【AI生成本文短摘要】：注：本部分内容由 AI 自动生成，仅供您参考。对于您使用本站 AI 自动生成内容所产生的一切后果，本网站及平台运营方概不承担任何商业和法律责任，请您知悉。 摘要为了有效校正透射式色散型成像光谱仪系统的谱线弯曲，提出了一种基于狭缝离轴的畸变补偿方法。该方法首先假设中心波长谱线弯曲得到校正，计算出色散元件的入射角随狭缝长度的变化关系；接着对狭缝进行离轴处理，利用准直镜的畸变得到色散元件的目标入射角，从而校正中心波长的Smile畸变（谱线弯曲），剩余波长的Smile畸变和Keystone畸变（色畸变）向外弯曲，整体呈枕形畸变；最后使用会聚镜的畸变校正剩余谱线弯曲。利用该方法设计了一款反射光栅型成像光谱仪，在各项参数满足设计要求的同时，利用准直镜畸变校正了系统的谱线弯曲，基于该设计研制了原理样机，系统Smile畸变最大为12.9 μm，Keystone畸变最大为6.4 μm，测试结果满足系统的设计要求，证明了该方法的可行性。 AbstractTo effectively correct the spectral line curvature of a transmission dispersive imaging spectrometer system, this paper proposes a distortion compensation method based on the off-axis slit. Specifically, the variation in the incident angle of the dispersive element with slit length is calculated on the basis of the assumed correction of the spectral line curvature of the central wavelength. Then, the slit is moved away from the optical axis of the collimator, and the target incident angle of the dispersive element is obtained based on the distortion of the collimator. The Smile distortion (spectral line curvature) of the central wavelength is thereby corrected. The Smile distortion and Keystone distortion (color distortion) of the remaining wavelength curve outward, and overall pincushion distortion is observed. Finally, the remaining spectral line curvature is corrected with the distortion of the converging lens. A reflection grating imaging spectrometer is designed by the proposed method, and the spectral line curvature of the system is corrected with the distortion of the collimator on the premise that the various parameters meet the design requirements. A principle prototype is developed on the basis of the above design. The system achieves a maximum Smile distortion of 12.9 μm and a maximum Keystone distortion of 6.4 μm. The test results meet the design requirements of the system and thus prove the feasibility of the proposed method. PDF全文 武志昆, 石恩涛, 王咏梅, 郭宝泽. 狭缝离轴校正透射式光谱仪谱线弯曲[J]. 光学学报, 2022, 42(24): 2423001. Zhikun Wu, Entao Shi, Yongmei Wang, Baoze Guo. Correction of Spectral Line Curvature of Transmission Spectrometers By Off-Axis Slit[J]. Acta Optica Sinica, 2022, 42(24): 2423001.
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