Polishing of Sapphire for Optical Applications

光学应用蓝宝石抛光

基本信息

批准号：
9360761
负责人：
Tirumalai Sudarshan
金额：
$ 6.5万
依托单位：
Materials Modification Inc.
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1994
资助国家：
美国
起止时间：
1994-02-15 至 1994-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360761&HistoricalAwards=false
关键词：
Polishing Sapphire Optical Applications

项目摘要

9360761 Sudarshan Current processes for manufacturing sapphire introduce a number of defects such as die marks and growth artifacts in the as-grown sapphire blank. Thus these materials will need to be polished prior to use in optics. The objective of this Phase I effort is to develop a high quality, high speed, cost effective technique for polishing sapphire based optics. The two methods currently used for polishing sapphire are: mechanical and mechanochemical, both of which involve scraping, grinding and using abrasives such as diamond or colloidal silica. These methods are expensive because of the long times required for polishing. Further, due to the application of mechanical pressure, heat is generated at the polishing interface leaving behind defects that affect optical performance. Phase I will establish the proof of concept by using a dual stage non-contact method to remove planar layers of the sapphire thus achieving surface roughness on the order of angstroms in both flat and curved blanks. Optical characterization will be performed on the polished samples and correlated to the processing parameters. In Phase II, we propose expanding this technique for optical domes. This technique can also be used for other applications involving optical components such as laser cavity mirrors, laser beam mirrors, lenses, windows with high optical transmission, components in floptical disk drives and magnetic disk drives. **

9360761 Sudarshan当前用于制造蓝宝石的流程引入了许多缺陷，例如随着生长的蓝宝石空白的模具和生长伪像。因此，这些材料将需要在使用光学元件之前抛光。 I阶段I努力的目的是开发一种用于抛光蓝宝石光学的高质量，高速，成本效益的技术。当前用于抛光蓝宝石的两种方法是：机械和机械化学，这涉及刮擦，研磨和使用诸如钻石或胶体二氧化硅等磨料。由于抛光需要很长时间，因此这些方法很昂贵。此外，由于施加了机械压力，在抛光界面上产生热量，留下影响光学性能的缺陷。第一阶段将通过使用双阶段的非接触方法来建立概念证明，以去除蓝宝石的平面层，从而在平坦和弯曲的毛坯的埃埃斯特罗姆的顺序上达到表面粗糙度。光学表征将在抛光样品上进行，并与处理参数相关。在第二阶段，我们建议将此技术扩展到光学域。该技术也可以用于涉及光学组件的其他应用，例如激光腔镜，激光束镜，镜头，带有高光学传输的窗户，Floptical Disk驱动器中的组件和磁性磁盘驱动器。 **