The following is an introduction to the anti-reflection coating technology of the organic lens of the pvd coating machine.

       1) Preparation before coating
       The lens must be pre-cleaned before being coated by a pvd coating machine, and this cleaning is very demanding and reaches the molecular level. Put various cleaning liquids in the cleaning tank, and use ultrasonic to enhance the cleaning effect. After the lens is cleaned, put it into the vacuum chamber. During this process, special attention should be paid to avoid dust and garbage in the air and then stick to the surface of the lens. . The final cleaning is in the vacuum chamber. During this process, special attention should be paid to avoid dust and garbage in the air from adhering to the surface of the lens. The final cleaning is carried out before coating in the vacuum chamber. The ion gun placed in the vacuum chamber will bombard the surface of the lens (for example, with argon ions). After this cleaning process is completed, the anti-reflection coating is applied.
       2) Vacuum coating
       The vacuum evaporation process of the pvd coating machine can ensure that the pure coating material is coated on the surface of the tempered glass lens, and the chemical composition of the coating material can be strictly controlled during the evaporation process. The vacuum evaporation process can precisely control the thickness of the film layer, and the accuracy is achieved.
       3) The firmness of the film layer
       For spectacle lenses, the firmness of the film layer is very important, and it is an important quality indicator of the lens. The quality indicators of the lens include lens wear resistance, cultural resistance, and temperature difference resistance. Therefore, there are now many targeted physical and chemical testing methods. Under the conditions of simulating the use of the wearer, the pvd coating machine tests the coating fastness quality of the coated lenses. These test methods include: salt water test, steam test, deionized water test, steel wool abrasion test, dissolution test, adhesion test, temperature difference test and humidity test, etc.