2019 Topical Meeting on Optical Interference Coatings: Manufacturing Problem Contest
Catherine C. Cooksey, Daniel Poitras, Li Li, Michael Jacobson
For the Seventh Manufacturing Problem contest, participants were asked to fabricate on a provided N-BK7 substrate a challenging filter with specific s-polarization transmittance spectra at angles of incidence of 10° and 50°, covering a wavelength range from 400 nm to 1100 nm. The problem selected was such that in order to achieve a performance close to the spectral targets, contestants had to be equally versed in design, measurement and fabrication of optical filters. Eight teams from different five countries participated in the contest using various deposition techniques. The teams designs had a number of layers varying from 74 to 255, and a total thickness between 8.2 µm and 17.6 µm, and were using either one or both sides of the substrate. The performances of all submitted filters were measured by two independent laboratories and the results were presented at the last Optical Interference Coating (OIC) meeting held in Santa Ana Pueblo, New Mexico, in June 2019.