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spun during the time of application to ensure a sufficient amount of coating is applied to the
entire surface. After the coating has been applied, the pump will stop and the spin speed of the
lens changes to a new value which will generate the proper film thickness of coating, based
upon the specific coating being used. The timing and spin speeds are controlled by the system
PLC. This process is shown schematically in the following diagram.
Figure 5 - Coating system schematic
Cure process
The Rx
is designed to cure Ultra Optics’ line of UV-based coatings. After the lens has
completed the coating application cycle, the lift cylinder will raise the arm assembly, which will
then rotate and drop down into the curing station. An ultra-violet lamp resides in the curing
station. The radiation energy from this lamp is used to effectively cure the coating to the lens
with the proper characteristics of adhesion, hardness, etc.
