A Kirkpatrick–Baez mirror, or simply KB mirror, focuses beams of
X-ray
An X-ray (also known in many languages as Röntgen radiation) is a form of high-energy electromagnetic radiation with a wavelength shorter than those of ultraviolet rays and longer than those of gamma rays. Roughly, X-rays have a wavelength ran ...
s by reflecting them at grazing incidence off a curved surface, usually coated with a layer of a heavy metal.
It is named after
Paul Kirkpatrick and
Albert Baez, the inventors of the
X-ray microscope.
Although X-rays can be focused by
compound refractive lenses, these also reduce the intensity of the beam and are therefore undesirable. KB mirrors, on the other hand, can focus beams to small spot sizes with minimal loss of intensity. Typically they are used in pairs - one to focus horizontally and one for vertical focus.
When the horizontal and vertical focuses coincide, the X-ray beam is focused to a point.
See also
*
X-ray microscope - First application of the KB mirror
*
X-ray optics - General article about all kinds of X-ray optics
References
{{DEFAULTSORT:Kirkpatrick-Baez mirror
Mirrors
x-raysbr>
Kirkpatrick-Baez mirrorby Arndt Last