Fabrication of aspheric surfaces through controlled deformation of the figure of spherical reflective surfaces
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United States of America Patent
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Feb 18, 1992
Issued Date -
N/A
app pub date -
Jun 11, 1990
filing date -
Jul 25, 1989
priority date (Note) -
Expired
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Abstract
An aspheric mirror, for example in the form of an off-axis parabolic mirror or a toric mirror, that includes a first element having a front surface which defines a spherical reflector and a spaced apart rear surface. The spherical reflector includes a constant radius of curvature, an X-axis with an X-axis radius of curvature and a Y-axis with a Y-axis radius of curvature. The first element possesses a first rigidity factor. A second element includes a front surface sized to mate with the rear surface of the first element along an interface zone. The second element possesses a second rigidity factor. An interface contour device produces a differential contour within the interface zone between the first and second elements. The interface contour device is aligned to modify the X-axis radius of curvature of the shperical reflector without significantly modifying the Y-axis radius of curvature. A compression device compresses the first and second elements together to deflect the first element relative to the second element to modify the X-axis radius of curvature without substantially modifying its Y-axis radius of curvature to produce an aspheric mirror.
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