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About: Pinhole (optics)     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatOpticalDevices, within Data Space : dbpedia.org associated with source document(s)

Type: yago:Object100002684yago:OpticalDevice103851341yago:PhysicalEntity100001930yago:Whole100003553yago:Artifact100021939yago:Device103183080yago:Instrumentality103575240yago:WikicatOpticalDevices New Facet based on Instances of this Class

A pinhole is a small circular hole, as could be made with the point of a pin. In optics, pinholes with diameter between a few micrometers and a hundred micrometers are used as apertures in optical systems. Pinholes are commonly used to spatially filter a beam (such as a laser beam), where the small pinhole acts as a low-pass filter for spatial frequencies in the image plane of the beam. Besides pinholes made by the point of a pin, precision commercial pinholes are often made by laser drilling through a thin foil.