公开(公告)号：US06875985B2

公开(公告)日：2005-04-05

申请号：US10227553

申请日：2002-08-22

Applicant: Colin David John Skelton

Inventor： Colin David John Skelton

IPC: G01N21/35 ,  G01J1/16 ,  G01J1/32 ,  G01N21/27 ,  G01N21/17

CPC classification number: G01N21/274 ,  G01J1/1626 ,  G01J1/32

Abstract: An infrared absorption gauge includes a detector circuit including a detector for detecting electromagnetic radiation from a sample and for generating a signal representing the radiation received, and means for stabilizing a response characteristic of the detector to the radiation detected thereby, said stabilizing means having a GaAs diode for directing radiation at the detector and means for controlling the radiation source in dependence upon the signal generated by the detector. The stabilizing means thus acts as a negative feedback loop and seeks to maintain the overall illumination irradiating the detector (i.e. the combined illumination that is reflected back from the sample and that is emitted by the GaAs diode), at a substantially constant predetermined level, which tends to linearize and extend the frequency response of the detector to the radiation detected.

Abstract translation: 红外吸收计包括检测器电路，其包括用于检测来自样本的电磁辐射并用于产生表示接收的辐射的信号的检测器，以及用于将检测器的响应特性稳定到由此检测的辐射的装置，所述稳定装置具有GaAs 用于在检测器处引导辐射的二极管，以及根据由检测器产生的信号来控制辐射源的装置。 因此，稳定装置用作负反馈回路，并且寻求维持照射检测器的总体照明（即从样品反射并由GaAs二极管发射的组合照明），基本上恒定的预定水平， 倾向于将检测器的频率响应线性化并扩展到所检测到的辐射。