axis of lens - definition. What is axis of lens
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%ما هو (من)٪ 1 - تعريف

LINE ALONG WHICH THERE IS SOME DEGREE OF ROTATIONAL SYMMETRY IN AN OPTICAL SYSTEM
Optic axis; Fiber axis; Beam axis; Geometric axis; Lens axis

Lens (hydrology)         
  • A freshwater lens on an island.
CONVEX LAYER OF FRESH GROUNDWATER THAT FLOATS ON TOP OF DENSER SALTWATER
User:Nsaum75/Lens (groundwater); User:Nsaum75/Lens (Hydrology); User:Nsaum75/Lens (hydrology); Lens (groundwater); Freshwater lens; Ghyben-Herzberg lenses; Ghyben–Herzberg lens; Ghyben-Herzberg lens; Ghyben/Herzberg lens; Groundwater lens
In hydrology, a lens, also called freshwater lens or Ghyben-Herzberg lens, is a convex-shaped layer of fresh groundwater that floats above the denser saltwater and is usually found on small coral or limestone islands and atolls. This aquifer of fresh water is recharged through precipitation that infiltrates the top layer of soil and percolates downward until it reaches the saturated zone.
Screw axis         
  • The [[Boerdijk–Coxeter helix]] is an example of a screw axis symmetry that is nonperiodic.
  • 3<sub>1</sub> screw axis in crystal structure of [[tellurium]]
LINE THAT IS SIMULTANEOUSLY THE AXIS OF ROTATION AND THE LINE ALONG WHICH TRANSLATION OF A BODY OCCURS
Screw axes; Helical axis; Instantaneous helical axis; Twist axis; Screw displacement; Screw operation
A screw axis (helical axis or twist axis) is a line that is simultaneously the axis of rotation and the line along which translation of a body occurs. Chasles' theorem shows that each Euclidean displacement in three-dimensional space has a screw axis, and the displacement can be decomposed into a rotation about and a slide along this screw axis.
Sri Lankan axis deer         
  • A pet deer at the Veddah village outside the chief's house
  • Females and two males. The male in the foreground has velvet antlers and the male in the centre of the herd has hard antlers
SUBSPECIES OF MAMMAL
Axis axis ceylonensis; Sri lankan axis deer; Ceylon Spotted Deer; Sri Lankan Axis Deer
The Sri Lankan axis deer (Axis axis ceylonensis) or Ceylon spotted deer is a subspecies of axis deer (Axis axis) that inhabits only Sri Lanka. The name chital is not used in Sri Lanka.

ويكيبيديا

Optical axis

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

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.