双色散二维阿达玛变换光谱仪

A Two-Dimensional Double Dispersed Hadamard Transform Spectrometer

设计了一种双色散二维调制的阿达玛变换光谱仪,利用光栅在水平方向的谱级色散和棱镜在垂直方向的谱线色散进行二维分光。与传统的二维光谱CCD探测方法不同,该设计独辟蹊径,采用面阵数字微镜对二维光谱进行阿达玛调制,并利用单点式检测器进行光信号的检测。理论计算及光学仿真表明,与传统的二维光谱探测仪器相比,该光谱仪不仅具有高的分辨率,同时还具有很高的信噪比。

A kind of two-dimensional hadamard transform spectrometer was developed.A grating was used for chromatic dispersion of orders and a prism was used for spectral dispersion.Quite different from traditional CCD detection method,a digital micromirror device（DMD） was applied for optical modulation,and a simple point detector was used as the sensor.Compared with traditional two-dimensional spectrometer,it has the advantage of high resolution and signal-noise-ratio,which was proved by theoretical calculation and computer simulation.