Astrophysics (index)about

Filter

(Passband Filter, Bandpass Filter)
(optical device to filter out part of the EMR spectrum)

In astronomy, optical Filters are used with telescopes to limit the spectrum reaching a sensor, by which an image over a more-limited range of Electromagnetic Radiation can be produced. They are used for Visible Light and adjacent regions of the EMR spectrum (within the Infrared and Ultraviolet Bands).

The term Passband can be thought of as the specification of such a filter, but the two terms are often treated almost as synonyms, and often the letter identifying the band is used to refer to the filter or to the Intensity of an object (star) seen through the filter.

Filters are also used for higher energy EMR, e.g., X-rays.


(telescopes,equipment)
http://en.wikipedia.org/wiki/Astronomical_filter

Referenced by:
Aperture Photometry
Atlas 3d
B
Bandwidth
Color Index
Exoplanet Eclipse Light Curve
First Galaxies
H-alpha (Ha)
HEAO-2
Holmberg Radius
I Band
JHK Photometric System (JHK)
K Band
Lyman-Break Galaxy (LBG)
Particle Spectrometer
Passband
Palomar Four-Filter Survey (PC)
Photometric Redshift
Photometric System
Photometry
R Band
Sensitivity Function (S)
Sky Subtraction
Sloan 2.5m Telescope
SkyMapper Southern Survey (SMSS)
Strömgren Photometric System
Synthetic Photometry
U
UK Schmidt Survey
V
Voyager

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