Zhang Zhi-hai, Muo Xiang-xia, Guo Yuan-jun, Wang Wei
Key Laboratory for Opto-Eletronic Technology and System, Ministry of Education, Chongqing University, Chongqing 400044, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jul;31(7):1975-9.
A new type micro Hadamard transform (HT) near-infrared (NIR) spectrometer is proposed in the present paper. It has a MOEMS (Micro-Opto-Electro-Mechanical Systems) blazed grating HT mask. It has merits of compactness, agility of dynamic mask generation and high scan speed. The structure and theory of this spectrometer are analyzed. The 63-order Hadamard-S matrix and mask are designed. The mask is dynamically generated by program of MOEMS blazed gratings. The spectrum is in agreement with that measured by Shimadzu spectrometer in experiments. It has a wavelength range between 900 and 1 700 nm, spectral resolution of 19 nm, single scan time of 2.4 s, SNR of 44.67:1, optical path of 70 mm x 130 mm, and weight under 1 kg. It can meet the requirement of real time detection and portable application.
本文提出了一种新型的微哈达玛变换（HT）近红外（NIR）光谱仪。它具有一个微机电系统（MOEMS）闪耀光栅HT掩膜。该光谱仪具有结构紧凑、动态掩膜生成灵活以及扫描速度快等优点。分析了该光谱仪的结构和原理。设计了63阶哈达玛S矩阵和掩膜。掩膜由MOEMS闪耀光栅程序动态生成。实验中该光谱仪测得的光谱与岛津光谱仪测得的光谱一致。它的波长范围在900至1700纳米之间，光谱分辨率为19纳米，单次扫描时间为2.4秒，信噪比为44.67:1，光路为70毫米×130毫米，重量小于1千克。它能够满足实时检测和便携式应用的需求。
