General and special lighting
Lighting covers a diversity of applications from general purpose illumination to special uses within the automotive and aviation industries as well as horticulture and many other niche areas. Gigahertz-Optik GmbH produces an extensive range of light measuring instruments for both LED and traditional lighting technologies. Some typical application examples using Gigahertz-Optik GmbH products follow.
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Light measurement requirements for Human Centric Lighting
Contemporary scientific research has shown that in addition to the cones and rods that provide us with color and night-time vision respectively, our retinas also have non-image forming photoreceptors, called intrinsically photosensitive retinal ganglion cells (ipRGCs), which play a major role in entraining our circadian rhythms. Of particular interest is the spectral responsivity of ipRGCs which contain a photopigment called melanopsin. Whereas our cones and rods have spectral responsivities defined by the V(λ) and V’(λ) functions for photopic and scotopic vision, ipRGCs have their own ‘melanopic’ spectral responsivity with peak sensitivity in the blue spectral region, around 480nm.
Flicker measurements of SSL products and installations
In the past, the introduction of electronic ballasts for fluorescent lamps largely eliminated concerns over light flicker caused by lamps and luminaires themselves. However, the widespread introduction of solid-state lighting (SSL) has, once again, made light flicker a topic of particular interest. This results from the fact that the LED light follows very quickly and proportionally the current that flows through the LED.