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DOI 10.1515/aot-2014-0013Adv. Opt. Techn. 2014; 3(2): 139140 Editorial Hans Dieter Tholl and Martin Laurenzis The principle to improve optical imaging by employing a dedicated illumination source is as old as the utilization of fire when early humans used torches to enhance vision in the absence of sunlight. Later on, passive and active means like illumination mirrors and lamps were developed to distribute light energy over an optical sensing area. These first approaches aimed at bringing light to shadows or darkened areas. Nowadays, the controlled interaction of illumination and optical sensing takes a major role in active imaging to analyze a scene with all available optical measures and to gain a detailed multidimensional (time, space, spectrum, and polarization) view of the observed objects. The origins of active imaging date back to the invention of sensitive electro-optical imaging equipment, powerful solid-state and semiconductor light sources, and fast modulation devices during the late 20th century. Since then, active imaging has become a versatile sensing technology, predominantly focused on defense and security applications due to the constraints in size, weight, power, and cost. The recent advances in gated CMOS imagers, laser diodes, fast electronics, and computer graphics pave the way for active
Advanced Optical Technologies – de Gruyter
Published: Apr 1, 2014
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