| spherical aberration |
A parabolic mirror will focus incoming light to a single point. A spherical mirror will focus incoming light to different points causing stars to no longer appear as nice round points of light. This distortion is called spherical aberration.
출처: www.dirtyskies.com/index.php/glossary/
|
|---|---|
| spherical aberration |
An aberration that prevents light reflecting from the perimeter of the objective from focusing at the same point as light from the centre. The result is loss of detail and haloes of unfocused light around objects.
출처: www.telescopehouse.co.uk/page.aspx
|
| spherical aberration |
causes light rays passing through a lens (or reflected from a mirror) at different distances from the optical center to come to focus at different points on the axis. This causes a star to be seen as a blurred disk rather than a sharp point. Most telescopes are designed to eliminate this aberration.
출처: www.astrostuff.com/OPTICAL_TERMS.htm
|
| spherical aberration |
when light strikes a spherical mirror, not all the wavelengths come to a focus at exactly the same point. This can create coloured 'halos' around objects being observed. In Newtonian Reflectors, this is alleviated by making the mirror elliptical. In Maksutov-Cassegrain telescopes and Schmidt-Cassegrain telescopes, a specially configured correcting plate corrects the light path.
출처: www.sctaas.com.au/Definitions.htm
|