【摘要】 中阶梯光栅光谱仪凭借着高分辨率、小体积、全谱瞬态直读等优异特性成为了现代光谱仪器研究的热点和重点。为了进一步缩小它的体积,提高仪器信噪比和检出限,设计了一种新型结构的中阶梯光栅光谱仪,其折叠主光路的设计可以在不改变成像质量、不降低光谱分辨率的前提下减小仪器体积,光学尺寸小于165 mm×70 mm×65 mm,光谱分辨率为0.06 nm@200 nm。同时设计了挡板、光阑等结构减小仪器的杂散光,经过光线追迹仿真实验,新型中阶梯光栅光谱仪杂散光低于2×10-5,显著地提高了仪器的信噪比。更多还原

【Abstract】 Echelle spectrometer is becoming a hot research and focus of modern spectrograph with the outstanding features of high resolution, small size, full spectrum transient direct- reading. In order to further refine its volume, improve the signal to noise ratio and the detection limit, a new structure of echelle spectrometer is designed. By folding main optical path, the new design has smaller size and lower stray light without reducing spectral resolution and image quality. It′s optical size is less than 165 mm ×70 mm ×65 mm,and spectral resolution is 0.06 nm@200 nm. The baffle and diaphragm is designed to further reduce stray light.Through ray tracing simulation, the stray light of the new echelle spectrometer is less than 2×10-5, the signal to noise ratio is improved significantly.更多还原