Apparatus for and method of correcting for astigmatism in a light beam reflected off of a light reflecting surface
An apparatus is described for correcting for astigmatism in a light beam reflected off of a light reflecting surface, comprising: (a) a first means defining a flat, rectangular light reflecting surface which is resiliently bendable, to a limited extent, into different concave and/or convex cylindrical curvatures about a particular axis. The first means is configured so that the light reflecting surface can be adjustably bent into the selected cylindrical curvature by applying a particular bending moment to the first means with respect to the surface, depending upon the curvature desired. The first means includes an integrally formed body member having a main plate-like segment including a front fact defining the light reflecting surface and a pair of spaced-apart flange segments extending rearwardly of the main segment; and (b) second means acting on the first means for adjustably bending the light reflecting surface into a particular selected one of the different cylindrical curvatures, depending upon the astigmatism to be corrected for.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4647164
- OSTI ID:
- 6608065
- Resource Relation:
- Patent File Date: Filed date 21 Nov 1985
- Country of Publication:
- United States
- Language:
- English
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