Difference between revisions of "Projector"
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Latest revision as of 15:23, 3 February 2024
2-2-005
An optical apparatus consisting of a light source and optically refracting or reflecting elements (or both) designed to concentrate light into one or more pencil beams or fan beams (or both), so that, within a limited solid angle, higher values of luminous intensity are produced than by the light source alone.
A projector may be intended to be viewed directly, to illuminate an object to be viewed, or to project an image.
Note: In German a distinction is made between the three functions of projectors mentioned. A projector to be viewed directly is called Signal-Scheinwerfer; a projector to illuminate an object is called Beleuchtungs-Scheinwerfer; a projector to project an image is called Bildwerfer or Projektor.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
