center of curvature


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center of curvature

[′sen·tər əv ′kər·və·chər]
(mathematics)
At a given point on a curve, the center of the osculating circle of the curve at that point.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
You move the tester to bring the light close to the block and near the center of curvature. Then, slide the block up or down so the light returned by the main mirror is at the height of the viewing aperture.
It has a center of curvature, and as long as the centers of curvature of the secondary elements are in line with that of the primary we are in good shape.
The test is quantitative since the fringe spacing corresponds to 1/2 wave on a mirror's surface when the interferometer is located at the center of curvature. If we are testing a telescope by autocollimated light with the help of an optical flat, the fringe spacing equals 1/2 wave on the wavefront.

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