How to prevent optical microscope aerosol
From the analysis of the causes of the mold fog described above, it can be known that, on the one hand, it is due to the poor chemical stability of optical glass. On the other hand, it is caused by insufficient attention to civilized production in the assembly process, and on the other hand, it is caused by poor use and storage. In particular, about 70% of the production process or repair process did not pay attention to clean production, causing mildew and fogging. It can be seen that clean operation is an important link to prevent mold and fog. In addition, technical measures such as ultra-clean workbench, electrostatic dust removal equipment, ultrasonic cleaning, double anti-film coating, and application of anti-mold agents are all necessary to maintain the quality of optical parts. effective measures.
(1) Treating optical glass parts with ethyl hydrogen-containing dichlorosilane (monomer) can obtain a good water-increasing layer, which acts as an anti-fog effect. Using it to clean the glass will look particularly refreshing and bright, which can effectively Thoroughly remove the "slobber circle", finger prints and some oil spots on the glass surface. It can also reduce the consumption of working hours and auxiliary materials, and improve the quality of products.
(2) The new process of pickling-steaming optical parts is used instead of manual glass cleaning. After years of practice, good results have been achieved. Its characteristic is.
① After the optical parts are pickled, the oxides on the surface of the parts and the nutrients for the growth of mold can be removed, so as to prevent and reduce the generation of mold fog.
②The production efficiency is high, which is 2-3 times higher than that of manual work. Even if there are individual marks, just wipe it with a cotton ball to clean it.
③Good quality, the glass wool surface is the birthplace of mold growth, after pickling, the surface is fresh and clean.
In order to improve the chemical stability of the glass, various double anti-coatings can be dip-coated during the processing. For glass with better chemical stability, 49' glass anti-fog layer or anti-fog film layer of Xu ethyl hydrogen-containing dihydrogen silane can be dipped. For glass with poor chemical stability, it can be vacuum-coated with mgF: film and then coated with SF20972 anti-protective layer or vacuum-coated with F46 polyperfluoroethylene propylene optical three-proof film, which are all effective methods.
In order to improve the anti-fog ability of the glass surface, the lens of the first and second types of glass can be wiped with a mixture of 0.25% ethylhydrogen-containing dihydrosilane during assembly, which can not only remove the fogging core (watermark, saliva circle, etc.) Surface strength, the effect is better. For lenses with good chemical stability, 0.25% ethyl hydrodichlorosilane or appropriate amount of 49' glass anti-fog agent can also be infiltrated in the ultrasonic cleaning solution to make it have an anti-fog film layer.
