公开(公告)号：US09212968B1

公开(公告)日：2015-12-15

申请号：US14012202

申请日：2013-08-28

Applicant: EXELIS, INC.

Inventor： David S. Smith ,  David R. Wickholm ,  Ronald Joseph Glumb ,  Sheldon David Stokes ,  Glen Daniel White

IPC: G01C21/02 ,  H01J3/14 ,  G01M11/00 ,  H01L31/167

CPC classification number: G01J1/08 ,  G01J2001/0481

Abstract: A calibration device for a radiometer includes an integrating cavity and a honeycomb blackbody mounted to the integrating cavity. A plurality of emitters are mounted to the exterior rim of the integrating cavity for transmitting narrow band wavelengths of light into and out of the integrating cavity. A controller, selectively, activates one or more emitters to radiate a single narrow band wavelength of light during an ON period and turn OFF during another period. A plurality of reference detectors are also mounted to the exterior rim of the integrating cavity for measuring the intensity of each narrow band radiation outputted from the integrating cavity. The reference detectors are effective in determining changes in intensity output by each of the narrow band emitters from the integrating cavity. The measured changes in intensity outputted by the emitters are used to calibrate the radiometer with the changes traced back to a NIST standard.

Abstract translation: 用于辐射计的校准装置包括集成腔和安装到积分腔的蜂巢黑体。 多个发射器被安装到积分腔的外缘，用于将窄带波长的光发射到和流出积分腔。 选择性地，控制器激活一个或多个发射器以在接通时段期间辐射单个窄带波长的光，并在另一周期期间关断。 多个参考检测器也被安装到积分腔的外缘，用于测量从积分腔输出的每个窄带辐射的强度。 参考检测器有效地确定来自积分腔的每个窄带发射器的强度输出的变化。 由发射器输出的强度测量的变化用于校准辐射计，其变化追溯到NIST标准。