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The catoptrics is the study of the reflection of light on reflective surfaces, so a branch of optics . The origin of the name is based on a treatise of the same name from ancient Greece, which is ascribed to Euclid . In this work, the relationship “angle of incidence is equal to angle of reflection” appears for the first time, part of the law of reflection , and concave and convex mirrors are dealt with. The catoptric is differentiated from the dioptric , which deals with refractive systems.

In light microscopy , catoptric condensers are those made up of mirrors as opposed to dioptric condensers made up of glass lenses. Catoptric condensers are used in dark field microscopy .

A catadioptric system, for example a catadioptric telescope , has both reflective (catoptric) and refractive (dioptric) elements. Further examples are mirror lens objectives and catadioptric dialytes .

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Individual evidence

  1. ^ A b Eugene Hecht: Optics . 5th edition. Oldenbourg Verlag, Munich 2009, ISBN 978-3-486-58861-3 , p. 170, 298, 369 (English: Optics. 4th edition . Translated by Anna Schleitzer).
  2. ^ Heinz Appelt: Introduction to microscopic examination methods . 4th edition. Academic publishing company Geest & Portig KG, Leipzig 1959, p. 106 f .