Ulm, AndreasAndreasUlmKönig, NielsNielsKönigSchmitt, RobertRobertSchmitt2024-07-102024-07-102024-06-24https://publica.fraunhofer.de/handle/publica/47119810.1117/12.3022608The monitoring of mechanical strain is essential in developing new materials, designing mechanical components and structural health monitoring. In applications where contactless measurement is required, a novel method is needed to allow for absolute and long-term measurements. We discuss a measuring principle based on diffractive nanostructures featuring these advantages. For the measurement, periodic nanostructures are applied to a component, illuminated with a defined light source and the resulting color impression is monitored. The relationship between the stretched geometry of the nanostructure and diffraction spectra allows to quantify the component’s strain. We present a guide-line for the design of industrial applicable and sensitivity-optimized nanostructures and discuss the advantages in different application scenarios.enTwo-photon polymerizationNon-contact strain sensorOptical nanostructuresLarge-scale replicationDDC::600 Technik, Medizin, angewandte Wissenschaften::620 Ingenieurwissenschaftenconference paper