The Andover Advantage: Prototype to Production; Catalog, Semi-Custom or Custom Filters. Andovers state-of-the-art coating chambers, automation, and thin-film deposition allows us to offer high-performance coatings and solutions. Andovers 16 production size coating chambers offer our customers solutions for many types of filter coatings. Not all filters fall into the same coating categories. Not sure what you need? Take a closer look at Andover Corporation for hard coat, traditional or hybrid optical coating solutions. Our in-house optical and mechanical engineering capabilities provide Andover a faster time-to-market for our customers. Andovers sales team works with customers to help determine the best solution for your optical needs, with 47 years of manufacturing business and well over 1,000,000 filters shipped worldwide. Andover continues to PROVIDE Innovative solutions to create a positive impact to our customers.