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ESS3271

ETC
Part Number ESS3271
Manufacturer ETC
Description Spectrometer
Published Jan 20, 2015
Detailed Description Spectrometer ESS3271 Lecture Spectrometer • An optical instrument used to measure properties of light over a specific po...
Datasheet PDF File ESS3271 PDF File

ESS3271
ESS3271

Overview
Spectrometer ESS3271 Lecture Spectrometer • An optical instrument used to measure properties of light over a specific portion of the electromagnetic spectrum • The variable measured is most often the light's intensity • A spectrometer is used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities Light dispersion Mirror Detector Slit + Filter Grating Diffraction Grating • An optical component with a surface covered by a regular pattern of parallel lines, typically with a distance between the lines comparable to the wavelength of light • Light rays that pass through such a surface are bent as a result of diffraction, related to the wave properties of light • This diffraction angle depends on the wavelength of the light Grating Equation k: diffraction order and n: groove density (g/mm) Littrow Condition Photomultiplier Tube (PMT) • Extremely sensitive detectors of light in the ultraviolet, visible and near infrared • Multiply the signal produced by incident light by as much as 108, from which single photons can be resolved PMT • Photomultipliers are constructed from a glass vacuum tube which houses a photocathode, several dynodes, and an anode • Incident photons strike the photocathode with electrons being produced as a consequence of the photoelectric effect • These electrons are directed by the focusing electrode towards the electron multiplier, where electrons are multiplied by the process of secondary emission • Each dynode is held at a more positive voltage than the previous one Spectrometers STSSeriesOEMMicrospectrometer Amazing Full-Spectrum Performance in a Tiny Footprint NFOER 2W011 The STS introduces a family of compact, low-cost spectrometers that’s ideal for embedding into OEM devices.
At just 40 mm x 42 mm x 24 mm (1.
6”x 1.
7”x 0.
9”), the STS provides full spectral analysis with low stray light (<0.
2% SRPR @ 450 nm), high signal-to-noise ratio (>1500:1) and optical resolution (~1.
5 nm FWHM) – remarkable perf...


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