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Polishing and polishing process of optical lens

2017/4/27      view:

                Optical lens after grinding fluid fine grinding, the surface is about 2 - 3M of the crack layer, to eliminate the method that the crack layer is polished. Polishing and grinding mechanism, only the use of tool material and polishing liquid (the subject), polishing materials have cloth (cloth), polished leather (PU) and pitch (pitch, usually to achieve high precision polishing surface, the most commonly used materials for advanced polishing asphalt.


                Polishing with asphalt, by careful asphalt surface, driven by polishing grinding fluid lens surface heat, so that the flow of molten glass, fused to the rough vertices and fill cracks in the bottom, and gradually the crack layer is removed. The polished glass lens polishing powder with cerium oxide (CeO2), polishing liquid blending proportion depends on lens polishing time different and different, generally polished early and polishing mold clamping when using higher concentration of polishing liquid, after the bright surface of the lens, use density is thin slurry, in order to avoid the mirror to generate the orange peel phenomenon (lens surface atomization).


                Polishing and grinding are the same as the movement mechanism, in addition to the polishing tool and working liquid is not the same, the required environmental conditions are more stringent than the grinding. General polishing time to pay attention to the following matters: the surface of the asphalt and the polishing liquid can not have impurities, otherwise it will cause specular scratching. Polished surface of the asphalt surface to be consistent with the lens, otherwise it will produce a beating, so bite the polishing powder and scratch the lens surface.


                Before polishing, the surface of the lens must be determined whether there is a scratch or a hole in the surface of the lens. The size of the polishing tool and the material is appropriate. Whether the pitch of the soft and the thickness is appropriate. In the process of polishing, we must pay attention to the conditions and the accuracy of the lens surface. The inspection of the lens surface defect, because the detection process is based on personal vision and method to judge, so the test of the wind and sand hole has a deep understanding of the specification, to often compare with the sand hole standard sample edition, in order to ensure the correctness of the test.