Lapping and Polishing Glass To Optical （研磨和抛光玻璃光学）.PDF

Model 920 Applications Laboratory Lapping and Polishing Glass to Report 23 Optical Smoothness Lapping and Polishing 1.0: Purpose To develop a polishing protocol for glass materials, creating an optically smooth surface finish for creating x-ray mirrors. Proper characterization of polishing pads, abrasive slurries, and processing parameters will be done for the production of high quality specimens. 2.0: Experiments and Procedures Glass specimens of nominally 2” diameter were mounted into a Lapping and Polishing fixture using a low melting point wax. The fixture used was the Model 155, allowing 2” diameter specimens to be ground and polished to a precise depth. In this case, the specimens had been surface ground on a 120 grit SiC belt sander to make them flat. Following specimen mounting, the sample was ground on 180 grit SiC paper using the Model 920 Lapping and Polishing Machine. The sample was planarized using the 180 grit paper to make the specimen surface parallel with the lapping fixture feet, allowing a flat, polished surface to be produced. Figure 1 is an illustration of the arrangement of the polishing machine with the lapping fixture. Lapping Wheel Figure 1: Illustration of the lapping wheel