Photoluminescence

Introduction - Photoluminescence excitation

Colloquially, luminescence means “cold light”. The excitation takes place in different ways. One area of luminescence is photoluminescence, which results through the excitation of a system by photons. This excitation takes place mainly in the invisible UV spectrum region, while the emission takes place in the visible region. Depending on the time between the excitation and the emission of the light, photoluminescence is divided into fluorescence and phosphorescence. Fluorescence ends quickly after the photon excitation while phosphorescence continues further. Luminophores, light stores, are responsible for this.

The devices in our production range have been selected to meet the specific requirements of the various applications and areas of application.

Typical Applications:
Document authentication	Authentication of bank notes, stamps, certificates and documents Authentication and testing of art work in terms of genuineness, archaeology etc.
Non-Destructive Testing	Hairline crack testing in quality control e.g. in aircraft structures, automatic steering systems, wheel rims, engine components
Hygiene and Germ Spread Control	Visualisation during hand hygiene training (Washing control and application of hand disinfection substances) Demonstration of cross-contamination (germ transfer) in hygiene schools. Application control of skin protection using personal protection equipment (PPE)
Automatic Image Identification	Applications in mail sorting machine Waste sorting systems
Criminology	Forensic science (Searches for important evidence at crime scenes, searches for causes of fires) Forensic Medicine Theft protecting by using hidden identification marking Invisible colour bombs which are set off by barrier systems
Biotechnology/Analytics
Geology	Testing for phosphorescence and fluorescence (mineralogy)