The coatings of our SEA-UV protected aluminum broadband front surface mirrors are consisting of a metallic aluminum layer and a very thin, protective SiO2 (quartz) overcoating. This protective quartz layer has two functions. Unprotected bare aluminum metal coatings oxidize quickly when exposed to oxygen. Also, they are very sensitive to scratching. The protection layer prevents oxidization and it makes the mirrors more scratch resistant. Compared to the soft and sensitive unprotected bare aluminum metal coatings, our protected aluminum coatings are harder, more durable and more resistant to scratches. However, they are still more scratch sensitive than our SEA-VIS enhanced aluminum mirrors, which for physical reasons can have a much thicker protective dielectric over coating. Due to the great UV-transmission and to the very low absorption of the very thin SiO2 layer within the UV- wavelength range, the desired high ultraviolet reflection of the metallic aluminium coating is retained. So the SEA-UV mirror coatings are often used as ultraviolet mirror optics or as broadband mirrors.
Metal coatings are not as strongly angle dependent as dielectric coatings are and feature a high optical reflection through the ultraviolet to the infrared light range. Only in the range around 700-870nm there is a small reflection drop down to slightly below 80%. The mirror optics can be used as multiple wavelength laser mirrors at very different wavelengths at the same time. They for example can reflect an invisible ultraviolet laser beam and at the same time they can reflect a visible or infrared laser beam. By adding additional thin dielectric coatings, the reflectivity of our protected aluminum front surface mirrors can be modified and increased for a special wavelength or particular optical reflection ranges. Please use our custom coating request form to conveniently request a quotation for your customized protected aluminum mirror. Please contact us if you need additional information or technical support.
You might wonder, why we don't have standard sized mirrors and that we do not provide a shopping cart? We are not limited to a few fix sized optics like most trading companies are. We are specialized in quick turnaround for custom sized mirrors to supply the best possible support to our customers. Hence our delivery time even for parts with custom dimensions at large quantities based on any of our coatings made regularly is usually less than a week. This is quicker than most resellers can be with their fixed size stock items and it is of great advantage that the size of the optics perfectly fits your application. So no shopping cart is necessary at all.
To quickly get a quote for our SEA-UV protected aluminium front surface mirrors with custom dimensions, please click the button below:
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Principle reflection curve of our SEA-UV protected aluminum mirror (Click on curve to enlarge)