Optical Axis
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Optical Axis
Optical axis (coincides with red ray) and rays symmetrical to optical axis (pair of blue and pair of green rays) propagating through different lenses.

An optical axis is a line along which there is some degree of rotational symmetry in an optical system such as a camera lens or microscope.

The optical axis is an imaginary line that defines the path along which light propagates through the system, up to first approximation. For a system composed of simple lenses and mirrors, the axis passes through the center of curvature of each surface, and coincides with the axis of rotational symmetry. The optical axis is often coincident with the system's mechanical axis, but not always, as in the case of off-axis optical systems.

For an optical fiber, the optical axis is along the center of the fiber core, and is also known as the fiber axis.

See also

References

  •  This article incorporates public domain material from the General Services Administration document: "Federal Standard 1037C".
  •  This article incorporates public domain material from the United States Department of Defense document: "Dictionary of Military and Associated Terms".

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

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