Large optics from silicon carbide

机译：大型碳化硅光学元件

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Abstract: Silicon carbide (SiC) has become a legitimate competitor to beryllium (Be) for large lightweight mirrors due to its high stiffness to weight ratio and low thermal expansion. However, there are many kinds of SiC and some are better suited for mirrors than others. After a comparison of the various SiC types we described one type of reaction bonded SiC that can be near- net-shape fabricated into very lightweight mirrors in sizes ranging from a few centimeters to greater than two meters. Lightweight spherical mirrors of 0.18 and 0.50 m diameter have been fabricated and polished to very low surface roughness. The blank and optical fabrication techniques are described, and characterization data are presented for uncoated polished surfaces. These mirrors have surface roughness of 8 - 15 angstroms rms and $lambda@/10 figure.!2

机译：摘要：碳化硅（SiC）具有高的刚度重量比和低的热膨胀性，因此已成为铍在大型轻型镜中的合法竞争对手。但是，SiC的种类很多，有些比其他的更适合用于镜子。在比较了各种SiC类型之后，我们描述了一种反应粘合SiC，可以将其近似网状地制成非常轻巧的反射镜，尺寸从几厘米到大于两米不等。已经制造了直径为0.18和0.50 m的轻型球面镜，并将其抛光到非常低的表面粗糙度。描述了毛坯和光学制造技术，并提供了未涂层抛光表面的特征数据。这些反射镜的表面粗糙度为8-15埃有效值和$ lambda @ / 10图形。！2

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《Large Optics II》|1991年|p.53-60|共8页
会议地点 Rochester NY(US)
作者
Roger A. Paquin; Hughes Danbury Optical Systems; Inc.; Tucson; AZ; USA; Matthew B. Magida; Hughes Danbury Optical Systems; Inc.; Danbury; CT; USA; Cynthia L. Vernold; Hughes Danbury Optical Systems; Inc.; Danbury; CT; USA.;
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中图分类机械、仪表工业;
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Large optics from silicon carbide

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