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Test Method for Surface Figure of Large Convex Mirrors
Test Method for Surface Figure of Large Convex Mirrors
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机译:大型凸镜表面图形的测试方法
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摘要
A method of testing a convex mirror surface figure in which an optical quality substrate material is used having a convex front surface and a rear surface polished to a precise optical figure to create a lens. The lens is then tested by a standard interferometric or wavefront lens-testing method and the convex surface coated once a desired curvature is obtained. Null testing may be attained by passing a collimated interferometer beam through a focusing lens shaped to counter the predicted spherical aberration introduced by a perfect convex mirror/lens.
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