The Hagner SA1 Light Intensity Adaptor is intended for use with the Hagner S1, S2, S3 and S4 Universal Photometers or with the Hagner E2X and E4-X Digital Luxmeters. By connecting the SA1 adaptor to one of these instruments it is possible to determine, for instance, light intensity and angular light distribution from lamps, luminaries etc. This can be done under normal ambient lighting conditions.
The Hagner SA1 intensity adaptor is intended for use with the Hagner S1, S2, S3 and S4 Universal Lightmeters or with the Hagner E2X and E4-X Digital Luxmeter.
The adaptor consists of an array of collinear fixed circular apertures, which effectively prevent stray lighting from the surroundings reaching the detector. Measurement of light intensity and angular light distribution can then be carried out under normal ambient lightning conditions, avoiding thee cost and complication of special darkened lamp and lighting laboratories. The luminance of bright surfaces can also be measured, with automatic screening of troublesome reflections. In spite of its simplicity, the light intensity adaptor opens up many new applications for the range of Hagner instruments, e.g.:
A. Measurements of the intensity of light sources such as lamps, light-emitting diodes, projectors, headlights, pyrotechnic light sources, fluorescent luminaries etc.
B. Measurement of polar light distribution curves for luminaries and headlights.
C. Measurement of luminance of projection screens, light tables and other light emitting surfaces.
The Hagner SA1 light intensity adaptor (see figure 1) consists of a black polyacetale plastic body (1) to which a standard or special Hagner detector (2) can be fitted. A number of black anodised fixed rings (3) are secured in the plastic body, and prevent radiation from light sources outside the measurement angel of the detector from reaching the detector. The measurement angel is determined by the size of the outer aperture (4).