1.1本试验方法涵盖使用可追溯至NIST的光谱辐照度标准对光谱辐射仪进行校准，以测量光谱辐照度。 注1-尽管本标准中引用了NIST，但应假设可以替代其他国际公认的标准实验室。 1.2该方法不受光谱辐射测量系统输入光学的限制。然而，输入光学元件的选择会影响校准的整体不确定性。 1.3该方法不受光谱辐射计系统中使用的单色器或光学探测器类型的限制。该方法的某些部分可能不适用于确定哪些部分适用于正在使用的特定光谱仪。 单色器和检测器的选择应适合校准所需的波长范围，这一点很重要。虽然该方法通常适用于基于光电二极管阵列探测器的系统，但用户应注意，这些类型的光谱辐射计通常存在杂散光问题，并且动态范围有限。除非解决了这些具体问题，否则不建议在紫外线范围内使用二极管阵列光谱仪。 1.4本方法中描述的校准使用光谱辐照度标准。光谱辐照度标准必须具有特定输入电流在给定波长下的已知光谱辐照度值和明确定义的测量几何形状。 光谱辐照度值的不确定性也必须已知。分配给本标准的值必须可追溯至NIST。这些标准可从多个国家标准实验室和商业实验室获得。光谱辐照度标准主要由石英外壳内带有卷曲灯丝的卤钨灯组成，但也使用其他类型的灯。可以获得校准值覆盖200至4500 nm波长范围的全部或部分的标准。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全和健康实践，并确定监管限制的适用性。

1.1 This test method covers the calibration of spectroradiometers for the measurement of spectral irradiance using a standard of spectral irradiance that is traceable to NIST. Note 1—Although NIST is referenced throughout this standard, it should be assumed that other internationally recognized standards laboratories may be substituted. 1.2 This method is not limited by the input optics of the spectroradiometric system. However, choice of input optics affects the overall uncertainty of the calibration. 1.3 This method is not limited by the type of monochromator or optical detector used in the spectroradiometer system. Parts of the method may not apply to determine which parts apply to the specific spectroradiometer being used. It is important that the choice of monochromator and detector be appropriate for the wavelength range of interest for the calibration. Though the method generally applies to photodiode array detector based systems, the user should note that these types of spectroradiometers often suffer from stray light problems and have limited dynamic range. Diode array spectroradiometers are not recommended for use in the ultraviolet range unless these specific problems are addressed. 1.4 The calibration described in this method employs the use of a standard of spectral irradiance. The standard of spectral irradiance must have known spectral irradiance values at given wavelengths for a specific input current and clearly defined measurement geometry. Uncertainties must also be known for the spectral irradiance values. The values assigned to this standard must be traceable to NIST. These standards may be obtained from a number of national standards laboratories and commercial laboratories. The spectral irradiance standards consist mainly of tungsten halogen lamps with coiled filaments enclosed in a quartz envelope, though other types of lamps are used. Standards can be obtained with calibration values covering all or part of the wavelength range from 200 to 4500 nm. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.