Editing Webcam (section)

===Laser beam profiling===
A webcam's CCD response is linearly proportional to the incoming light.<ref>Cignoli F, De Iuliis S, Zizak GA. Webcam as a light probe beam profiler. Appl. Spectrosc. 58, (2004), 1372.</ref> Therefore, webcams are suitable to record laser beam profiles, after the lens is removed. The resolution of a [[laser beam profiler]] depends on the pixel size. Commercial webcams are usually designed to record color images. The size of a webcam's color pixel depends on the model and may lie in the range of 5 to 10&nbsp;μm. However, a color pixel consists of four black and white pixels each equipped with a color filter (for details see [[Bayer filter]]). Although these color filters work well in the visible, they may be rather transparent in the near infrared. By switching a webcam into the Bayer-mode it is possible to access the information of the single pixels and a resolution below 3&nbsp;μm was possible.<ref>G. Langer et al., A webcam in Bayer-mode as a light beam profiler for the near infrared, Optics and Lasers in Engineering 51 (2013) 571–575</ref>