Broadband Miniature Spectrometer Optimal Design And Application System

The applications of traditional spectrometers are constrained due to their big volume and high costs, miniaturization becomes to be their important developing direction for coping with the popularity of the spectrometer. As the development of MEMS, photoelectric detection technology, advanced manufacturing technology and the development of computer technology, the spectrometer into a new stage of the development of automation, intelligent, digital, miniaturization direction.In this paper, the main works focus on the broadband miniature spectrometer design and achievement, according to the characteristics of spectrometer application system, the optimization of the optical system was improved, while the measurement accessories were developed, and then established a solid foundation platform for in-depth application system.In the optical design and optimization of the broadband miniature spectrometer, a cross asymmetric Czerny-Turner optical structure was selected. For the optical performance of the miniature spectrometer, a freefom cylindrical lens based on the detector surface to correct broadband astigmatism and improve the light collection efficiency, and a freeform lens based on the detector surface to correct broadband coma and improve the resolution. Optimized design and analysis of theory for the first time, and good correction results have achieved. The linear CCD detector was chosen as this system detection element, the whole circuit and detection system were realized. The design of the mechanical system and optical element and thorough tolerance analysis of this system were achieved. The software was developed, it can provide various user interface for software re-development.During the performance testing and the development of the accessories, a spectrally tunable light source using a large number of LEDs has been designed. The combination of deuterium tungsten and halogen light source was realized, and the development of the standard light source was realized. The relative radiometric measurement and absolute radiometric measurement were proposed. In the application of miniature spectrometer, three kinds of measurement system scheme for light source color and reflection object color measurements were proposed. From hardware, software, algorithms implemented on the system to realize parameters of various colors of the real-time measurements in the CIE1931and CIE1964color system and different standard illuminants (A, B, C, D50, D55, D65, D75, Fl～F12). For measurement error in the measurement process, there is proposed a low-reflectance element back reflective compensation model, and a non-neutral reflectance integrating sphere.