Optical fiber bundle spectrometer

Abstract

The invention discloses an optical fiber bundle spectrometer, which comprises an optical fiber bundle, a dispersion element and an array detector element, wherein an output end of the optical fiber bundle is arranged into an optical slit, is fixedly arranged on an incident light path of the dispersion element, and is directly used as an incident slit of the spectrometer, the energy loss of a sampling optical signal can be greatly reduced, the instrumental sensitivity is greatly improved, as a result, the nonlinearity, the dark noise and the stray light error of the instrument are reduced, and higher measurement accuracy and quicker measurement velocity are obtained. Through orderly arranging a two-dimensional array detector and optical fiber units at the input end and the output end of the optical fiber bundle and connecting a plurality of sets of sub-fiber bundle spectrometer in parallel, the two-dimensional image spectra measurement and multi-purpose spectral measurement can be realized through the optical fiber bundle spectrometer, so the optical fiber bundle spectrometer has the advantages of dispensing with mechanical scanning or switching mechanism, and having quick measurement speed, high precision, flexible configuration, wide application range and the like.

Description

【Technical field】 [0001] The invention belongs to the field of spectral radiation measurement, in particular to an optical fiber bundle spectrometer using an array detector. 【Background technique】 [0002] Spectroscopy is a technique for measuring the intensity of light in the ultraviolet, visible, near-infrared, and infrared bands. Spectral measurement has a wide range of applications, such as color measurement, concentration measurement of chemical components, electromagnetic radiation analysis, light source luminescence, and aerospace spectral analysis. [0003] Optical fiber bundle spectrometers usually use optical fiber bundles as optical signal receiving and coupling devices. Because of their convenience, they have been widely used in fast spectrometers using array detectors. The basic principle is: an optical fiber bundle composed of multiple optical fibers is used as an optical signal input The component, which introduces the measured optical signal into the spectro...

AI Technical Summary

Problems solved by technology

[0004] However, the existing optical fiber bundle spectrometer has the following defects: the incident slit only allows a small amount of light emitted from the optical fiber or optical fiber bundle to enter the spectrometer dark box to participate in the measurement, while most of the sampled optical signals do not participate in the measurement, resulting in the spectrometer The sensitivity of the detector is low, this problem is particularly prominent in the measurement of weak light, which will bring a large measurement error, and the low sensitivity means that the integration time of the detector is generally longer in the measurement, and it is easy to bring nonlinearity and Larger errors such as dark noise

The above methods also have the problems of high cost and long measurement time. If the luminescence of the measured target changes rapidly with time, an accurate spectral image cannot be obtained at all.

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