fold mirror
English
[edit]Noun
[edit]- 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 , 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...