Kunshan Noli Optical introduction: optical glass lens polishing process

1. Polishing of optical glass lenses

For half a century, people have put forward various opinions on the exploration of optical glass polishing mechanism, but there is no unified understanding so far. When discussing the factors affecting optical polishing, it is often only emphasized the role of a certain aspect. In the past, most of the research on glass polishing focused on the process conditions and process parameters such as polishing machine tools, the selection of polishing die materials and the physical properties of polishing powder, while the comprehensive factors affecting the effect of glass polishing were less considered, especially the different chemical properties of various brands of optical glass displayed in polishing, the chemical properties of various polishing fluids and the relationship between the two in polishing It is often ignored by most people.

According to long-term practice and understanding of polishing mechanism, we tend to interpret the theory of synthesis, that is, we regard the polishing process as a synthesis of physical and chemical effects, and the effects of both exist at the beginning and end of the polishing process. The polishing of optical glass is a very complicated process, and the influencing factors are also very complicated.

The above factors, under certain circumstances, play a role in the polishing speed and surface quality of optical parts, but some factors play a more prominent role, such as the type of optical glass, and the type of polishing fluid, for all optical glass, each has its different properties, but some brands of glass also have similar or the same properties. The practice shows that polishing of optical parts must distinguish different kinds of optical glass and select suitable polishing conditions.

Second, cold processing of optical glass lenses

The first: milling, is to remove the uneven bubbles and impurities on the surface of the optical glass, (about 0.05-0.08) play a forming role.

The second step is the finishing process, which eliminates the damage layer of the milled optical glass and fixes the R-value.

The third is the polishing process, which is to polish the polished glass lens in one time, and this process is mainly to make the appearance better.

The fourth step is cleaning, which is to clean the polishing powder on the surface of the polished lens after polishing. Anti-compaction 

The fifth step is edging, which is to grind the outer diameter of the original lens to the specified outer diameter.

The sixth step is coating, which is to coat the surface of the optical glass lens with one or more layers of colored film or other film

The seventh step is inking, it will be necessary to apply a layer of black ink on the outside of the lens to prevent reflection.

The eighth step is gluing, which is to combine two lenses with opposite R-values and the same outer diameter material with glue.

Special processes: multi-sheet processing (disc processing) and small spherical processing (20 axes) wire cutting according to different production processes, the process will be slightly different, such as the order of ink and gluing.