ASTM G130-2012
使用分光谱射度计校准窄带和宽带紫外辐射计的标准试验方法

Standard Test Method for Calibration of Narrow- and Broad-Band Ultraviolet Radiometers Using a Spectroradiometer

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标准号

ASTM G130-2012

发布日期

2012年

实施日期

废止日期

无

国际标准分类号

17.180.20 (Colours and measurement of light)

发布单位

US-ASTM

适用范围

4.1x00a0;This test method represents the preferable means for calibrating both narrow-band and broad-band ultraviolet radiometers. Calibration of narrow- and broad-band ultraviolet radiometers involving direct measurement of a standard source of spectral irradiance is an alternative method for calibrating ultraviolet radiometers. This approach is valid only if corrections for the spectral response of the instrument and the spectral mismatch between the calibration spectral distribution and the target spectral distribution can be computed. See Test Method for a description of the spectral mismatch calculation.

4.2x00a0;The accuracy of this calibration technique is dependent on the condition of the light source (for example, cloudy skies, polluted skies, aged lamps, defective luminaires, etc.), and on source alignment, source to receptor distance, and source power regulation.

Note 5x2014;It is conceivable that a radiometer might be calibrated against a light source that represents an arbitrarily chosen degree of aging for its class in order to present to both the test and reference radiometers a spectrum that is most typical for the type.

4.3x00a0;Spectroradiometric measurements performed using either an integrating sphere or a cosine receptor (such as a shaped PTFE³, or Al₂O₃ diffuser plate) provide a measurement of hemispherical spectral irradiance in the plane of the spherex0027;s entrance port. As such, the aspect of the receptor plane relative to the reference light source must be defined (azimuth and tilt from the horizontal for solar measurements, normal incidence with respect to the beam component of sunlight, or normal incidence and the geometrical aspect with respect to an artificial light source, or array). It is important that the geometrical aspect between the plane of the spectroradiometerx0027;s source optics and that of the radiometer being calibrated be as nearly identical as possible.

Note 6x2014;When measuring the hemispherical spectral energy distribution of an array of light sources (for lamps), normal incidence is defined by the condition obtained when the plane of the receiver aperture is parallel to the plane of the lamp, or burner, emitting area.

4.4x00a0;Calibration measurements performed using a spectroradiometer equipped with a pyrheliometer-comparison tube (a sky-occluding tube), regardless of whether affixed directly to the monochromatorx0027;s entrance slit, to the end of a fiber optic bundle, or to the aperture of an integrating sphere, shall not be performed unless the radiometer being calibrated is configured as a pyrheliometer (possesses a view-limiting device having the approximate optical constants of the spectroradiometerx0027;s pyrheliometer-comparison tube).

4.5x00a0;Spectroradiometric measurements performed using source optics other than the integrating sphere or the x201c;standardx201d; pyrheliometer comparison tube, shall be agreed upon in advance between all involved parties.

4.6x00a0;Cal......

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