FTIR Software Handling, Instrument Demonstration PART-2 in Hindi
21.8 هزار بار بازدید -
5 سال پیش
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Description-Chemical infrared spectroscopy emerged as
Description-Chemical infrared spectroscopy emerged as a science in the 1880s. In the 1890s, A. A. Michelson, to further his studies of the speed of light, invented the interferometer. In the early 1940s, chemical infrared spectroscopy was still an immature scientific field. But with the commercial development of the optical null dispersive spectrophotometer, later that decade, chemical infrared spectroscopy came into widespread use. Dispersive instruments proved the tremendous value of infrared analysis, and soon became the mainstay of organic characterization laboratories. In 1949 astrophysicist Peter Fellgett used an interferometer to measure light from celestial bodies and produced the first Fourier transform infrared spectrum. But for many years, only a few advanced research groups with access to large, expensive computers and with personnel able to wait up to 12 hours to transform an interferogram into a spectrum used Fourier transform infrared (FTIR) spectroscopy. For two decades more, FTIR spectrometers were limited to studying problems not solvable with dispersive techniques. In the late 1960s when microcomputers able to do the Fourier transform became available, commercial FTIR spectrometers appeared. The 1966 development of the Cooley-Tukey algorithm, which quickly does a Fourier transform (the Fast Fourier Transform or FFT), was also instrumental in the commercialization of FTIR spectrometers. However, the first FTIR spectrometers were large and expensive and were found primarily in a few well-to-do research labs. Gradually, the technology reduced the cost, increased availability, and enhanced the capabilities of FTIR spectroscopy systems. The performance-to-price ratio provided by FTIR spectrometers today was unthinkable only a decade ago.
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5 سال پیش
در تاریخ 1398/07/16 منتشر شده
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