Fourier spectrometer
Quick Summary
A Fourier-transform spectrometer is a device used in spectroscopy to analyze wavelengths of electromagnetic radiation. Unlike traditional absorption spectrometers that use a narrow band of radiation and a monochromator, a Fourier-transform spectrometer uses a broad band of radiation. This broad band passes through a sample, creating an interferogram due to the absorption of specific components.12
This interferogram, a signal intensity versus time function, is then digitized and stored in computer memory. A mathematical operation called a Fourier transform is applied to this data to convert the interferogram into the absorption spectrum. The primary advantage of this method is its speed, resolution, and sensitivity, allowing the entire spectrum to be recorded simultaneously with a single detector. Fourier-transform spectrometers can be designed to cover a wide range of spectral regions, from radio frequencies to X-rays.312
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mass spectrometryIon-trap methods…idea, the omegatron and the Fourier-transform spectrometer. Both make use of the cyclotron principle (see particle accelerator: Cyclotrons), in which positive ions produced by a beam of electrons flowing along the axis of a uniform magnetic field follow circular trajectories with a radius proportional to momentum, r = mv/zB, and…
Read More…idea, the omegatron and the Fourier-transform spectrometer. Both make use of the cyclotron principle (see particle accelerator: Cyclotrons), in which positive ions produced by a beam of electrons flowing along the axis of a uniform magnetic field follow circular trajectories with a radius proportional to momentum, r = mv/zB, and…
Read More- spectroscopyInterference
…the light intensity at the detector into the usual frequency domain of the absorption spectrum (see analysis: Fourier analysis). The principal advantage of this method is that the entire spectrum is recorded simultaneously with one detector.
Read More…the light intensity at the detector into the usual frequency domain of the absorption spectrum (see analysis: Fourier analysis). The principal advantage of this method is that the entire spectrum is recorded simultaneously with one detector.
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- spectroscopyExperimental methods
A Fourier-transform spectrometer provides a conventional absorption spectrometer-type spectrum but has greater speed, resolution, and sensitivity. In this spectrometer the sample is subjected to a broadband source of radiation, resulting in the production of an interferogram due to the absorption of specific components of the radiation.…
Read MoreA Fourier-transform spectrometer provides a conventional absorption spectrometer-type spectrum but has greater speed, resolution, and sensitivity. In this spectrometer the sample is subjected to a broadband source of radiation, resulting in the production of an interferogram due to the absorption of specific components of the radiation.…
Read More - spectroscopyInfrared instrumentation
In a Fourier-transform instrument, the range available for a single scan is generally limited by the beam-splitter characteristics. The beam splitter functions to divide the source signal into two parts for the formation of an interference pattern. In the near-infrared region either a quartz plate or silicon…
Read MoreIn a Fourier-transform instrument, the range available for a single scan is generally limited by the beam-splitter characteristics. The beam splitter functions to divide the source signal into two parts for the formation of an interference pattern. In the near-infrared region either a quartz plate or silicon…
Read More