UV optics utilize specific substrates, anti-reflection coatings, or a combination of them to maintain performance, ultraviolet application is important to the success of your set up. Shorter wavelengths, any pitting, imperfections or coating impurities on the optical surface may form a concentration of optical power creating a hot spot on the optic. Depending on your application and how far you are into the UV wavelengths, quality, cleanliness, and special packaging requirements are key considerations.
Proper manufacturing and cleanliness are required to make the best UV optics possible. If improper grinding or polishing techniques are used, there is a potential for the substrate to have higher micro-roughness The visual inspection of the substrate surfaces may look good, but when UV coatings are applied, a typical outcome is grazing or micro-fractures in the coating. Typically the blame is put on the quality of the coating but in many cases, substrate preparation is critical for good coating adherence. Contact PFG Optics for extensive experience in manufacturing, cleanliness, coating technology, packaging and proper handling of UV lenses.