论文标题
96 DB线性高动态范围CAOS光谱仪演示
96 dB Linear High Dynamic Range CAOS Spectrometer Demonstration
论文作者
论文摘要
首次证明了CAO（即编码的访问光传感器）光谱仪。实施的设计使用反射性衍射光栅和时频CAOS模式操作数字微摩尔设备（DMD）与大面积点光检测器结合使用，以启用高度可编程的线性高动态范围（HDR）光谱法。实验是用2850 K的色温灯泡源和可见的带色带通道和高通滤波器以及中性密度（ND）衰减过滤器进行的。 〜369 nm至〜715 nm的输入光源光谱是通过设计〜1 nm光谱分辨率测量的。使用光学过滤器和不同的CAO模式，即代码分组多访问（CDMA），频率调制（FM）-CDMA和FM时间分配多访问（TDMA）模式，分别改善了光谱仪的线性动态范围，分别为28 dB，50 dB和96.2 db。线性HDR CAOS光谱仪的应用包括生物医学，食品，取证和药物的材料检查。
For the first time, a CAOS (i.e., Coded Access Optical Sensor) spectrometer is demonstrated. The design implemented uses a reflective diffraction grating and a time-frequency CAOS mode operations Digital Micromirror Device (DMD) in combination with a large area point photo-detector to enable highly programmable linear High Dynamic Range (HDR) spectrometry. Experiments are conducted with a 2850 K color temperature light bulb source and visible band color bandpass and high-pass filters as well as neutral density (ND) attenuation filters. A ~369 nm to ~715 nm input light source spectrum is measured with a designed ~1 nm spectral resolution. Using the optical filters and different CAOS modes, namely, Code Division Multiple Access (CDMA), Frequency Modulation (FM)-CDMA and FM-Time Division Multiple Access (TDMA) modes, measured are improving spectrometer linear dynamic ranges of 28 dB, 50 dB, and 96.2 dB, respectively. Applications for the linear HDR CAOS spectrometer includes materials inspection in biomedicine, foods, forensics, and pharmaceuticals.
