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fold mirror. In DICTIOUS you will not only get to know all the dictionary meanings for the word
fold mirror, but we will also tell you about its etymology, its characteristics and you will know how to say
fold mirror in singular and plural. Everything you need to know about the word
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English
Noun
fold mirror
- An mirror used to bend an optical path so that it can be made longer than the physical size of the system
1978, D. G. Korsch, Anastigmatic three-mirror telescope, US Patent 4101195 (PDF version), retrieved 2021-12-27, page 2: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...