mangin mirror meaning in Hindi

Examples

1. It consisting of a small meniscus lens and Mangin mirror as its " secondary mirror ".
2. There are optical mirrors such as Mangin mirrors that are " back-silvered " ( reflective coating on the rear surface ) as part of their optical design.
3. The element farthest from the primary mirror is a Mangin mirror, in which the element acts as a second surface mirror, having a reflective coating applied to the surface facing the sky.
4. The optics used is a type of mangin mirror system, consisting of a meniscus lens corrector element combined with the semi-reflective mirror, sometimes referred to in advertising as a " two lens " or " double lens " system.
5. In 1979 Tamron was able to produce a very compact light weight catadioptric by using rear surface silvered mirrors, a " Mangin mirror " configuration that saved on mass by having the aberration corrected by the light passing through the mirror itself.
6. CATs of 500mm focal length were common; some were as short as 250mm, such as the "'Minolta RF Rokkor-X 250mm f / 5.6 "'( Japan ) of 1979 ( a Mangin mirror CAT roughly the size of a 50mm f / 1.4 lens ).