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2001
Book Article
Titel
Electronics replaces optical filters
Abstract
For chemical sensors, optical methods have come more and more into application. Optical sensors are more stable and more sensitive compared with common chemical sensors. The optical detection method can be separated into three basic principles: absorption, fluorescence and chemiluminescence. Each principle has its own advantages and disadvantages. This article deals with fluorescence. Fluorescence is basically the immediate transformation from a shorter wavelenght to a longer wavelength of light. The shorter wavelength e. g. blue light is absorbed by the fluorescence dye (excitation light) and emitted as fluorescence light with a longer wavelength e. g. green light. The wavelength conversion rule follows the basic principles of atom physics with a characteristic decay-time tau.