fold mirror

noun

An mirror used to bend an optical path so that it can be made longer than the physical size of the system

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Meanings

noun
  1. An mirror used to bend an optical path so that it can be made longer than the physical size of the system

    To achieve this, a plane mirror, which functions as a fold mirror, is positioned at an angle of 45° with respect to the image formed by the primary-secondary mirrors...

    1978, D. G. Korsch, Anastigmatic three-mirror telescope, US Patent 4101195 (PDF version), retrieved 27 Dec 2021, page 2
Cite this entry
APA

fold mirror. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/fold%20mirror

MLA

“fold mirror.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/fold%20mirror. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “fold mirror,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/fold%20mirror.

Source: fold mirror on Wiktionary, CC BY-SA 4.0.