光学学报, 2018, 38 (2): 0230001, 网络出版: 2018-08-30   

微小型傅里叶变换光谱仪波前像差分析与光谱修正 下载: 896次

Wavefront Aberration Analysis and Spectrum Correction of Microminiature Fourier Transform Spectrometer
作者单位
1 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林 长春 130033
2 中国科学院大学,北京 100049
摘要
为了进一步实现傅里叶变换光谱仪的微小型化,在基于多级微反射镜的傅里叶变换光谱仪结构中引入微透镜阵列,利用微透镜阵列对由多级微反射镜调制的各级次的干涉光场单元进行同步收集。光场相位采用空间调制的方式,因此系统的波前像差会导致各级次干涉光场单元的子波前产生不同程度的畸变。建立含有波前像差的光场与多级微反射镜和微透镜阵列相互作用的标量衍射理论模型,计算表明波前像差会导致各级次干涉像点的强度产生不同程度的衰减,同时在复原光谱中引入低频噪声。通过分析发现,干涉像点强度的衰减是各干涉光场单元子波前像差的斯特列尔比调制的结果,且复原光谱中的低频噪声主要源于斯特列尔比的傅里叶谱。根据波前像差对干涉图像的调制特点,提出了一种利用波前像差的斯特列尔比对干涉光强进行修正的方法,计算表明该方法可以使复原光谱的失真得到有效改善。
Abstract
In order to realize the microminiaturization of the Fourier transform spectrometer (FTS) further, the micro lens array is introduced to FTS based on stepped micro-mirrors, which is used to collect each interference optical field unit modulated by stepped micro-mirrors synchronously. Because of the spatial modulation mode, the system wavefront aberration causes the wavefront distortion of each interference optical field unit. The scalar diffraction model of the interaction between the optical field with wavefront aberration and the stepped micro-mirrors, and the micro lens array is built. By means of calculation, the wavefront aberration is found impairing the intensity of each point in interference image at different levels, and introducing the low-frequency spectrum noise to the recovered spectrum. The analyses show that the intensity attenuation of interference image points results from the intensity modulation by wavefront aberration Strehl ratio of each interference optical field unit, and the low-frequency spectrum noise is mainly from the Fourier spectrum of Strehl ratio. According to the modulation characteristic of the wavefront aberration on interferogram, a method that using the wavefront aberration Strehl ratio to correct the interferogram intensity is proposed. The results indicate that this method improves the distortion of the recovered spectrum effectively.

吕金光, 梁静秋, 梁中翥, 秦余欣. 微小型傅里叶变换光谱仪波前像差分析与光谱修正[J]. 光学学报, 2018, 38(2): 0230001. Jinguang Lü, Jingqiu Liang, Zhongzhu Liang, Yuxin Qin. Wavefront Aberration Analysis and Spectrum Correction of Microminiature Fourier Transform Spectrometer[J]. Acta Optica Sinica, 2018, 38(2): 0230001.

本文已被 3 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!