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Glacier X Spectrometer

BioPhotonics
Feb 2011
B&W TekRequest Info
 
B&W Tek Inc. has unveiled Glacier X, a thermoelectrically cooled miniature fiber-coupled spectrometer, for applications that require high performance and portability. It is equipped with a 2048-element linear CCD array, a 16-bit digitizer and a plug-and-play USB 2.0 interface that transfers data at a rate of up to 180 spectra per second. Compared with noncooled CCD spectrometers, the device offers a higher dynamic range, reduced dark counts and good baseline stability, making it suitable for low-light-level detection and long-term monitoring applications, according to the company. The thermoelectric cooling makes it possible for weak signals, such as fluorescence and Raman, to be integrated for sufficient time to accumulate measurable signals for detection, resulting in a good signal-to-noise ratio. Applications include UV, visible and near-IR spectroscopy.


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GLOSSARY
absorbance
The natural log of the ratio of absorbed intensity over the total intensity which gives a constant value assuming a stable volume as well as energy. In optical physics the absorbance may be defined as the absorption cross section multiplied by the absorbing material length.
fluorescence
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
reflectance
The ratio of reflected flux to incident flux. Unless otherwise specified, the total reflectance is meant; it is sometimes convenient to divide this into the sum of the specular and the diffuse reflectance.
spectrometer
A kind of spectrograph in which some form of detector, other than a photographic film, is used to measure the distribution of radiation in a particular wavelength region.  
spectrophotometry
Study of the reflection or transmission properties of specimens as a function of wavelength.
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