Flemming J C
National Aeronautics and Space Administration,Goddard Space Flight Center, Greenbelt, Maryland, USA.
Appl Opt. 1966 Feb 1;5(2):195-200. doi: 10.1364/AO.5.000195.
For those interested in measuring the spectral radiance of high-intensity arcs, especially in the ultraviolet region, the 3000 degrees C blackbody has several advantages over the conventional tungsten ribbon filament standard of spectral radiance. At a wavelength of 250 nm, it is between two and three orders of magnitude more intense and could have 30% to 40% less uncertainty in its spectral radiance. Moreover, by using the blackbody, measurements could be extended to wavelengths shorter than 250 nm. On the other hand, the intensity advantage of the blackbody can be nearly eliminated by operating and calibrating a tungsten standard-type lamp well over its rated current. Tests have shown that the stability of these lamps operated at 45 A and 50 A is suitable for calibration purposes.
对于那些想要测量高强度电弧的光谱辐射率的人，尤其是在紫外线区域，与传统的钨带灯丝光谱辐射率标准相比，3000摄氏度的黑体有几个优点。在250纳米的波长下，它的强度要高出两到三个数量级，并且其光谱辐射率的不确定性可能会降低30%到40%。此外，通过使用黑体，测量可以扩展到短于250纳米的波长。另一方面，通过在远超其额定电流的情况下操作和校准钨标准型灯，黑体的强度优势几乎可以被消除。测试表明，这些灯在45安培和50安培下运行时的稳定性适用于校准目的。
