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首页> 外文期刊>Key Engineering Materials >Fine ELID Grinding on the Symmetric Paraboloidal Mirror of Quartz
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Fine ELID Grinding on the Symmetric Paraboloidal Mirror of Quartz

机译：石英对称抛物面镜上的精细ELID磨削

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Quartz has excellent optical properties and thus it is often used as the material of mirror and lens. However, it is almost impossible to be machined by cutting due to its brittle and high hardness. Grinding is a common method for machining quartz. One of the authors designed a new type of a paraboloidal mirror of quartz for the neutron optical devices. The fabrication process of this mirror was investigated in this experiment. A jig with two grooves of 90 degrees was made and two workpieces were stuck on the jig using the wax melt at about 60 degrees centigrade. The two workpieces were first ground applying ELID (electrolytic in-process dressing) grinding method with #325 and #1200 cast iron bonding diamond abrasive wheels. Then the ground surface was polished with CeO_2 slurry. The finished surface roughness was Ra2.0nm and rms2.4nm and its form error about 2μm. After coating process, its properties of focusing neutron beam were measured. The results were that the reflecting rate was 42%, gain 1.9 and 2.3mmx10.1mm beam focused to 1.6mmx2.1mm.
机译：石英具有优异的光学性能，因此通常用作镜子和透镜的材料。但是，由于其脆性和高硬度，几乎不可能通过切削加工。磨削是加工石英的常用方法。其中一位作者设计了一种用于中子光学器件的新型石英抛物面镜。在该实验中研究了该镜子的制造过程。制成具有两个90度凹槽的夹具，并使用约60摄氏度的蜡熔体将两个工件粘贴在夹具上。首先使用＃325和＃1200铸铁结合金刚石砂轮，通过ELID（电解过程修整）研磨方法对这两个工件进行研磨。然后用CeO_2浆液抛光地面。最终的表面粗糙度为Ra2.0nm和rms2.4nm，其形状误差约为2μm。镀膜后，测定其聚焦中子束的性质。结果是反射率为42％，增益1.9，2.3mmx10.1mm光束聚焦到1.6mmx2.1mm。

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