MINIATURIZED CONFOCAL SPECTROMETER

摘要

Miniaturized spectrometers for mobile use are known, said spectrometers being used to analyse the spectrum of the emission radiation that has been induced in an object by incident radiation. Said devices comprise a light source having a pinhole aperture, an illumination beam bath, a detection beam path, and a spectrometer. A diode laser is preferably used as an edge emitter (without a pinhole aperture) for the miniaturized spectrometer according to the invention. The window of the edge emitter is arranged at the focal point of the convergent lens at the input of the illumination beam path (without an optical fiber), preferably without a pinhole aperture. The edge emitter produces a divergent beam having an elliptical cross-section. The aspect ratio of the main axes of the ellipse is more than 2 to 1. The long main axis of the ellipse extends parallel to the longitudinal axis of the entrance slit of the microspectrometer. The miniaturized spectrometer has a reduced size and an increased sensitivity to emission radiation with a low intensity. The excitation radiation subjects the object to no significant stress. Objects in the microliter or milligram range can be analysed without inducing stress.