Quality directly from the specialist for more than 20 years The company bk-Interferenzoptik Elektronik GmbH was founded in 1991 for the manufacture of thin layers, in particular interference filters. Since then we’ve been working with state of the art computer-operated high vacuum vaporization and sputter plants. The strategical focus on innovative products is the basis of success for our company. We don’t only offer standard products but also finished products especially designed for your requirements according to industrial scale. In this case, mass production as well as low volume (starting with one unit) is possible. We have constantly developed ourselves further due to many years of research, development and manufacture of high-quality optical filters. Therefore, our standard and special coatings are globally recognized. The cooperation with Prof. Dr. Stefan Sotier, which has been existing since the founding of the company, turned to be particularly successful for our company. Consistent quality “Quality is the sum of all characteristics of a good or a service, which makes it suitable to meet the requirements of the customers.” A core of skilled workers, the modern production, and the efficient company organization guarantee consistent high quality standards (according to DIN EN ISO 9001, MIL STD 810 E). Short delivery times Short delivery times also for large quantities (for standard filters as well as individual production according to customers’ wishes). Our advantages in short: quality and safety rank first in our acting ? decades of experience ? we cooperatively meet the requirements of our customers ? our products and services comply with the agreements ? in order to preserve our environment we pay attention to recycling and to an economical use of resources ? we implement our goals according to our quality manual, which is constantly improved with specific customer demands and a zero-mistake philosophy in mind. Our products: endoscopic equipment, glasses for technical purposes, precision opto-mechanical sub-assemblies, interference filters, optical filters, light filters, infrared filters, lens systems for microscopes, integrated optical components, endoscope optics, precision mechanical/optical assemblies (clean-room manufactured), quartz glass optics, anti-reflections for optical components, laser mirrors, cold mirrors, notch filters, dichroic filters, Indium tin oxide (ITO) coating, fluorescence filters.