Optical: systems and elements – Mirror – Including specified control or retention of the shape of a...
Patent
1997-04-14
1999-03-02
Shafer, Ricky D.
Optical: systems and elements
Mirror
Including specified control or retention of the shape of a...
359849, 359871, 359900, 248466, G02B 508, G02B 7182, A47F 114
Patent
active
058779051
ABSTRACT:
An improved support for a telescope mirror using a system of three bars which are joined at their ends to the back of the mirror with compliant adhesive pads. Preferably, one end is joined to the center of the mirror while the others are joined on the circumference of a circle centered on the center of the mirror. In this preferred embodiment, there is an approximately right triangular relationship between the centers of the bars. The backs of the bars are coupled at their centers to mirror adjusting mechanisms by further compliant pads. The numbers of support points can be increased by coupling further bars or triangles between the circumferential support points of the original three bars and the back of the mirror. Again coupling is provided by compliant adhesive pads. The thickness and size of all pads are controlled to provide stiff support in compression and shear along with resilient support in bending. The preferred geometry of the support configuration of the back of the mirror makes collimation easier by decoupling altitude and azimuth adjustments. Stress-free assembly of the mirror and its supports is accomplished by applying the adhesive pads in liquid form, then allowing the pads to cure while the components are supported with spacers. Because the pads are pliable, spacers are easily removed after curing and, should there be any need to disassemble the mirror, the thickness of the pads allows for easy cutting.
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Taki, Toshimi, "Mirror Support: 3 or 9 Points?", Sky and Telescope, Sep., 1994, pp. 84-87.
Taki, Toshimi, "More Thoughts on Mirror-Cell Design", Sky and Telescope, Apr. 1996, pp. 75-77.
Berry, Richard, Build Your Own Telescope, Scribner, NY 1985, pp. 165-169.
Robinson Mark A.
Shafer Ricky D.
Townsley Norton R.
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