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High-Sensitivity Spectrometer

BioPhotonics
Jan 2011
Avantes BVRequest Info
 
Avantes BV has unveiled the AvaSpec Sens-Line high-sensitivity spectrometers that are designed for applications such as fluorescence spectroscopy and low-light-level detection. Features include high quantum efficiency, back-thinned CCD detectors and a proprietary optical bench. The ULS2048x16-USB2 model features high quantum efficiency for measurements in the UV to NIR range (200 to 1160 nm). The effective detector height with 16 pixels of 14 μm is 224 μm, and the pixels are vertically binned. The ULS2048x64-USB2 has 64 pixels measuring 14 μm, vertically binned to an effective detector height of 900 μm, and its sensitivity is four times higher. It supports 1.75-ms integration times, and its specifications related to dark noise, etaloning, antiblooming and dynamic range are similar to those of the other model.


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GLOSSARY
dark noise
The noise produced in a photodetector when the photocathode is shielded from all external optical radiation and operating voltages are applied.
etaloning
A phenomenon that degrades the performance of thinned, back-illuminated CCDs. The effect is caused by lightwaves passing through the CCD and reflected at the rear surface, producing interference fringes when they interact with incoming waves.
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.
fluorescence spectroscopy
The spectroscopic study of radiation emitted by the process of fluorescence.
optical bench
A support for optical parts comprising a solid bed that permits precise longitudinal movement of one component relative to the others, and a number of sliders equipped with holders for lenses, lamps, apertures, eyepieces, ground glass, etc. Scales often are provided to measure the movement of the various sliders. Some special-purpose benches carry a nodal slide and flat-field bar with a microscope carriage for lens testing. Two-dimensional benches have appeared recently that consist of a...
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.  
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