公开(公告)号：US11920983B2

公开(公告)日：2024-03-05

申请号：US17706352

申请日：2022-03-28

Applicant: Nanyang Technological University

Inventor： Quan Liu ,  Yi Zhang

IPC: G01J3/28 ,  G01J3/02

CPC classification number: G01J3/2846 ,  G01J3/0208 ,  G01J3/0229 ,  G01J2003/285

Abstract: Embodiments are directed to an optical spectrometry method, comprising: generating a sequence of 2D Hadamard masks along the time dimension, wherein each 2D Hadamard mask is arranged with a wavelength dimension and a coefficient dimension; detecting an optical signal from light transmitted through the sequence of 2D Hadamard masks; and reconstructing a spectrum to be detected by analyzing the optical signal, wherein each 2D Hadamard mask in the sequence of 2D Hadamard masks comprises a plurality of columns along the wavelength dimension, each column corresponding to a different Hadamard coefficient, and having different respective sequency values along the time dimension.

公开(公告)号：US4856897A

公开(公告)日：1989-08-15

申请号：US85530

申请日：1987-08-14

Applicant: William G. Fateley ,  David C. Tilotta

Inventor： William G. Fateley ,  David C. Tilotta

IPC: G01J3/12 ,  G01J3/28 ,  G01J3/44 ,  G02F1/13

CPC classification number: G01J3/2846 ,  G01J3/44 ,  G02F1/1313 ,  G01J2003/1269 ,  G01J2003/285 ,  G01J3/0229

Abstract: An improved Raman spectrometer device is provided which provides useful spectral information in situations where Raman spectroscopy has heretofore been unworkable. The spectrometer of the invention makes use of a stationary electrooptical masking device in lieu of conventional slit scanning optics, with the mask being computer controlled to provide a multiplexing function, typically employing Hadamard mathematics. The stationary encoding mask permits use of a relatively inexpensive photodiode detector, as compared with photomultiplier tubes conventionally used in Raman instrumentation. Advantageously, unwanted Rayleigh scattered radiation can be completely eliminated, either by blanking those zones of the mask receiving such radiation, or physically locating the device in such orientation that the Rayleigh scattered radiation does not pass through operative portions of the mask.

Abstract translation: 提供了一种改进的拉曼光谱仪装置，其在拉曼光谱迄今为止不能工作的情况下提供有用的光谱信息。 本发明的光谱仪利用固定的电光掩模装置代替传统的狭缝扫描光学器件，其掩模被计算机控制以提供通常采用Hadamard数学的复用功能。 与常规用于拉曼仪器的光电倍增管相比，固定编码掩模允许使用相对便宜的光电二极管检测器。 有利的是，可以通过对接收这种辐射的掩模的那些区域进行消隐，或者将该器件物理地定位成使得瑞利散射辐射不通过掩模的可操作部分的方向，来完全消除不需要的瑞利散射辐射。