Hans Wolter (11 May 1911 in
Dramburg
Drawsko Pomorskie (until 1948 pl, Drawsko; formerly german: Dramburg) is a town in Drawsko County in West Pomeranian Voivodeship in northwestern Poland, the administrative seat of Drawsko County and the urban-rural commune of Gmina Drawsko Pom ...
– 17 August 1978 in
Marburg
Marburg ( or ) is a university town in the German federal state (''Bundesland'') of Hesse, capital of the Marburg-Biedenkopf district (''Landkreis''). The town area spreads along the valley of the river Lahn and has a population of approxima ...
) was a German physicist who designed an aplanatic system of
grazing incidence mirrors that satisfied the
Abbe sine condition
The Abbe sine condition is a condition that must be fulfilled by a lens or other optical system in order for it to produce sharp images of off-axis as well as on-axis objects. It was formulated by Ernst Abbe in the context of microscopes.
The ...
(i.e. free of both
spherical aberration and
coma).
Wolter showed such a system could be produced using a combination of a
paraboloid
In geometry, a paraboloid is a quadric surface that has exactly one axis of symmetry and no center of symmetry. The term "paraboloid" is derived from parabola, which refers to a conic section that has a similar property of symmetry.
Every plan ...
with either a
hyperboloid or
ellipsoid secondary. The three simplest designs are outlined and are known as
Wolter telescope
A Wolter telescope is a telescope for X-rays that only uses grazing incidence optics – mirrors that reflect X-rays at very shallow angles.
Problems with conventional telescope designs
Conventional telescope designs require reflection or refract ...
s of types I, II and III.
References
External links
X-ray Imaging Systems
{{DEFAULTSORT:Wolter, Hans
20th-century German physicists
1911 births
1978 deaths
People from Drawsko Pomorskie
People from the Province of Pomerania