Example 1 Precision Longpass Filter with Physical Dimension Feature Control.
Filter with two Precision Longpass Filters at different wavelengths (+/-3nm) deposited sequentially on the same Substrate. The transition between the coatings to <50 microns. High transmission required (no AR on second surface).
Transmission >90% average. Transition Zone <30 microns. High Durability, Low Shift coatings.