面向深空探测的空间相位调制干涉分光型THz谱成像技术研究

In order to meet the application requirements of THz spectral imaging instrument with high sensitivity and real-time imaging for deep-space planetary surface mineral detection and temperature mapping, this project tries to design and establish a miniaturized, all-solid-state THz spectrometer based on our invention- Multi-depth Phase Modulation Grating and Mn-Co-Ni-O thin film detector. This novel terahertz spectrometer will adopt static Fourier transform method and sub-aperture segmentation technology to realize the requirement of miniaturization and all solid state. This project is trying to find solutions for technical problems, like modeling the radiative characteristics of materials, calculating the material composition and temperature with high precision based on THz spectra, developing high-precision terahertz interferometric devices, removing the background noises and achieving real-time wide-band terahertz spectrum detection with high sensitivity. In addition, this project will verify the technical reliability of Multi-depth Phase Modulation Grating and Mn-Co-Ni-O thin film detector and build a good foundation for the future engineering application of these two instruments. In conclusion, the implementation of this project will help to promote the development of deep-space terahertz spectrum detection payload and narrow the gap with European and American countries in this field, and it will also have an important impact on public safety, biomedical and other fields.

本项目面向深空行星地表物质成分探测和行星地表温度测绘对高灵敏度、实时成像的太赫兹光谱成像仪器的应用需求，基于独立自主知识产权的立体相位光栅和Mn-Co-Ni-O薄膜探测器，采用静态傅里叶变换和子孔径分割技术相结合的谱探测手段开展3-20THz波段的全固态、小型化太赫兹光谱仪系统方案设计和验证研究，解决物质的太赫兹辐射特性建模分析，基于太赫兹光谱的物质组分与温度高精度反演，太赫兹高精度干涉分光器件研制，热辐射背景噪声干扰去除，高灵敏度宽波段实时探测等技术难题，并验证太赫兹立体相位光栅和锰钴镍氧薄膜探测器的技术可靠性，为仪器未来的工程化研制奠定基础。项目的实施有助于促进我国深空太赫兹光谱探测载荷的发展，缩小同欧美国家的差距，同时该项目的顺利实施也将对公共安全、生物医疗等领域产生重要影响。

面向深空探测中物质太赫兹谱探测的应用需求，对太赫兹波段深空探测光谱仪器的可行性及适用性进行了研究，针对太赫兹波段光谱成像技术进行了系统方案设计，解决了物质在太赫兹波段的特征辐射建模、微弱信号获取、矿石的指纹谱定位、光谱成像系统设计及辐射定标等一系列技术难题，研制了多通道太赫兹光谱成像仪的原理验证样机，并评估了该原理样机的系统性能，对太赫兹光谱成像仪器在深空探测中的工程化应用具有重要的推动作用。