Yoon Howard W, Gibson Charles E
Division of Optical Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Appl Opt. 2002 Oct 1;41(28):5872-8. doi: 10.1364/ao.41.005872.
The temporal stability of the National Institute of Standards and Technology (NIST) spectral irradiance scale as measured with broadband filter radiometers calibrated for absolute spectral irradiance responsivity is described. The working standard free-electron laser (FEL) lamps and the check standard FEL lamps have been monitored with radiometers in the ultraviolet and the visible wavelength regions. The measurements made with these two radiometers reveal that the NIST spectral irradiance scale as compared with an absolute thermodynamic scale has not changed by more than 1.5% in the visible from 1993 to 1999. Similar measurements in the ultraviolet reveal that the corresponding change is less than 1.5% from 1995 to 1999. Furthermore, a check of the spectral irradiance scale by six different filter radiometers calibrated for absolute spectral irradiance responsivity based on the high-accuracy cryogenic radiometer shows that the agreement between the present scale and the detector-based scale is better than 1.3% throughout the visible to the near-infrared wavelength region. These results validate the assigned spectral irradiance of the widely disseminated NIST or NIST-traceable standard sources.
描述了用经校准以获得绝对光谱辐照度响应率的宽带滤光辐射计测量的美国国家标准与技术研究院（NIST）光谱辐照度标度的时间稳定性。已使用辐射计在紫外和可见波长区域监测了工作标准自由电子激光（FEL）灯和核查标准FEL灯。用这两种辐射计进行的测量表明，与绝对热力学标度相比，NIST光谱辐照度标度在1993年至1999年的可见光范围内变化不超过1.5%。在紫外区域的类似测量表明，从1995年至1999年相应变化小于1.5%。此外，基于高精度低温辐射计对六台经校准以获得绝对光谱辐照度响应率的不同滤光辐射计进行的光谱辐照度标度核查表明，当前标度与基于探测器的标度之间在整个可见光至近红外波长区域的一致性优于1.3%。这些结果验证了广泛传播的NIST或可溯源至NIST的标准源所指定的光谱辐照度。
