April 19, 2014. Gigahertz-Optik has introduced the ISS-17-VA integrating sphere source calibration standard for spectral radiance and luminance. A key feature of Gigahertz-Optik ISS series is a ...
In this International Year of Light, it is particularly appropriate to review the historical concept of what is light and the controversies surrounding the extent of the visible spectrum. Today we ...
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