Optical axis


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. 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


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  • optical axis — n a straight line perpendicular to the front of the cornea of the eye and extending through the center of the pupil called also optic axis …   Medical dictionary

  • optical axis — ▪ optics       the straight line passing through the geometrical centre of a lens and joining the two centres of curvature of its surfaces. Sometimes the optical axis of a lens is called its principal axis. The path of a light ray along this axis …   Universalium

  • optical axis — optinė ašis statusas T sritis fizika atitikmenys: angl. optic axis; optical axis vok. optische Achse, f rus. оптическая ось, f pranc. axe optique, m …   Fizikos terminų žodynas

  • optical axis — optinė ašis statusas T sritis Standartizacija ir metrologija apibrėžtis Tiesi linija, einanti per optinių paviršių kreivumo centrus. atitikmenys: angl. optical axis vok. optische Achse, f rus. оптическая ось, f pranc. axe optique, m …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • optical axis — optinė ašis statusas T sritis Gynyba apibrėžtis Tiesi linija, einanti per lęšio išlinkimų centrus. Optinėje sistemoje – linija, sudaryta iš atskirų sutampančių optinės sistemos elementų pagrindinių optinių ašių. atitikmenys: angl. optical axis… …   NATO terminų aiškinamasis žodynas

  • optical axis — noun 1. a. : a straight line perpendicular to the front of the cornea of the eye and extending through the center of the pupil b. : the axis of symmetry of a radially symmetrical optical system 2. : optic axis 1 …   Useful english dictionary

  • optical axis — In a lens element, the straight line which passes through the centers of curvature of the lens surfaces. In an optical system, the line formed by the coinciding principal axes of the series of optical elements …   Military dictionary

  • optical axis — An imaginary line drawn from the geometric center of a film to the center of a lens. It may project beyond the lens. Also called a lens axis and a camera axis …   Aviation dictionary

  • Optical axis grating — Optical axis gratings (OAGs) are gratings of optical axis of a birefringent material. In OAGs, the birefringence of the material is constant, while the direction of optical axis is periodically modulated in a fixed direction. In this way they are …   Wikipedia

  • Optical axis gratings — (OAGs) are gratings of optical axis of a birefringent material. In OAGs, the birefringence of the material is constant, while the direction of optical axis is periodically modulated in a fixed direction. In this way they are different from the… …   Wikipedia


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