IBS 2000: ion beam sputtering on large area astronomical optics

The IBS2000 project aims to develop a coating machine to coat optics with complex coating designs up to 2m in diameter. Due to the high optical quality and precision, low losses, and high mechanical and environmental stability, IBS is chosen as the coating process. The novel approach is based on the concept, where both the substrate and the sputter assembly are in motion. The assembly is hereby located below the substrate and will move linearly while the substrate rotates around the short main axis of inertia. Simulations are performed applying a virtual coater concept and are used to validate homogeneity and the layer deposition parameters. The results will be applied to homogenize the projected coating distribution on the final 2m optics.