Semrock Optical Filter Catalogs by IDEX Health & Science Our engineers and product management teams have collaborated to provide you with our Semrock Optical Filter Catalogs from IDEX Health & Science. With proven results, we give you access to high-level engineering that will help make every photon count in your system. Semrock Essential Performance optical filters deliver comprehensive, cost-effective solutions that align cutting-edge performance with accessible budgetary considerations. Semrock High Performance optical filters offer industry-best solutions for researchers and OEMs who require the absolute highest signal-to-noise ratios.