A Lyot1 stop (also called a glare stop) is an optical stop, invented by French astronomer Bernard Lyot, that reduces the amount of flare caused by diffraction of other stops and baffles in optical systems.
Lyot stops are located at images of the system's entrance pupil and have a diameter slightly smaller than the pupil's image. Examples of applications can be found in Ref.2
References
References
- Lyot, Bernard (1939). "The Study of the Solar Corona and Prominences without Eclipses (George Darwin Lecture, delivered by M. Bernard Lyot, Assoc.R.A.S., on 1939 May 12)". Monthly Notices of the Royal Astronomical Society. 99 (8): 580–594. Bibcode:1939MNRAS..99..580L. doi:10.1093/mnras/99.8.580.
- "The near-infrared camera SWIRCAM". Archived from the original on 4 March 2016. Retrieved 25 December 2012.