Solar prism
Opto-mechanical constructions are referred to as solar prisms, with which the observation of the sun is made safer, more convenient and / or more precise.
There are several aspects to consider that are essential for solar observation :
- the great abundance of light - the need for one or more suitable filters or other damping measures
- the development of heat - protection against cracking, for example of the telescope eyepiece or the filter
- the possible shadowing of disturbing side daylight or effective screens
- and, depending on the construction, other aspects (thermal stability of the instrument, photography, etc.)
Known systems of solar prisms come from
- the optician Rudolf Brandt (Sonneberg Observatory, approx. 1950) with a flat prism (optics) and particularly effective heat avoidance
- the geodesist Brar Roelofs (Netherlands?, approx. 1955) for solar azimuth measurement with theodolites
- some designers of large solar telescopes .
See also: day observation , solar activity , coelostat