|
|
Definition of Principal axis
1. Noun. A line that passes through the center of curvature of a lens so that light is neither reflected nor refracted. "In a normal eye the optic axis is the direction in which objects are seen most distinctly"
Lexicographical Neighbors of Principal Axis
Literary usage of Principal axis
Below you will find example usage of this term as found in modern and/or classical literature:
1. The Elementary Part of A Treatise on the Dynamics of a System of Rigid by Edward John Routh (1905)
"Condition that a line should be a principal axis. ... Hence, to find whether any
assumed straight line is a principal axis or not, draw any plane ..."
2. Strength of Materials by James Ellsworth Boyd (1917)
"Resultant Load not on a principal axis.—In all the problems of the preceding
articles, the resultant load fell on one principal axis and rotation took place ..."
3. The Elementary Part of A Treatise on the Dynamics of a System of Rigid by Edward John Routh (1905)
"This clearly amounts to only one equation, and is the required condition that
the straight line should be a principal axis at some point in its length. ..."
4. The Encyclopedia Americana: A Library of Universal Knowledge (1918)
"... the same time one of the secondary axes elongates, becoming tfa principal axis
of the adult, and the body : comes bilaterally symmetrical with referen. ..."
5. Proceedings of the Cambridge Philosophical Society by Cambridge Philosophical Society (1883)
"... page 10, it was asserted that it did not appear possible for a liquid ellipsoid
to rotate about an axis other than a principal axis and to have a free ..."
6. Elementary Treatise on Natural Philosophy by Augustin Privat-Deschanel (1883)
"A lens is usually a solid of revolution, and the axis of revolution is called
the axis of the lens, or sometimes the principal axis. When the surfaces are ..."
7. Elementary Treatise on Natural Philosophy by Augustin Privat-Deschanel (1884)
"In the case of a concave lens, rays incident parallel to the principal axis
diverge after passing through; and their directions, if produced backwards, ..."
8. The American Journal of the Medical Sciences by Southern Society for Clinical Investigation (U.S.) (1876)
"When therefore the axis of the luminous bundle is coincident with the principal
axis of the mirror, the image will have its location on the principal axis ..."
Other Resources:
