公开(公告)号：US20160313233A1

公开(公告)日：2016-10-27

申请号：US15078589

申请日：2016-03-23

Applicant: NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY

Inventor： CHRISTOPHER D. ZANGMEISTER ,  JAMES G. RADNEY

IPC: G01N21/17 ,  G01N21/25 ,  G01N21/31

CPC classification number: G01N21/1702 ,  G01N2021/1704 ,  G01N2201/06113

Abstract: A photoacoustic spectrometer includes: a light source including: a supercontinuum laser to produce a first light including a high-frequency; a tunable wavelength filter to select a wavelength of the first light; a bandwidth filter to select a bandwidth of the first light; a modulator to receive the first light and to modulate the first light at an acoustic frequency to produce a probe light including: the acoustic frequency; and the high-frequency, the light source to irradiate nondestructively a sample with the probe light; a cavity to receive the sample and the probe light and including: a first window to transmit the probe light into the cavity; and a second window to transmit the probe light out of the cavity; a transducer to detect a photoacoustic signal produced from the sample in response to absorption of the probe light by the sample; and an optical detector to detect the probe light.

Abstract translation: 光声光谱仪包括：光源，包括：超连续谱激光器，用于产生包括高频的第一光; 用于选择第一光的波长的可调谐波长滤波器; 带宽滤波器，用于选择第一光的带宽; 调制器，用于接收第一光并且以声频调制第一光以产生探测光，包括：声频; 和高频，光源用探测器非破坏性地照射样品; 用于接收所述样品和所述探测光的腔，并且包括：将所述探测光透射到所述腔中的第一窗口; 以及第二窗口，用于将探测光发射出所述空腔; 换能器，用于响应于样品对探针光的吸收而检测由样品产生的光声信号; 以及用于检测探测光的光学检测器。