Spectrometers Swiftly Store Scans in RAM
Sep 2008Avantes BVRequest Info
• down to 0.1 ms per scan
• no USB overhead
• 200 to 1100 nm
Avantes BV has introduced a store-to-RAM function on its AvaSpec spectrometers, enabling storage of a large number of scans at high speed. With this feature, the AvaSpec-2048-USB2 system now can store more than 1000 full spectra and the Avaspec-128-USB2 model, almost 20,000 spectra. The storage capacity can be expanded even further by reducing the pixel range and selecting only the start and stop pixels.
The company says that the new function is the fastest, most reliable way to rapidly collect and save spectra without the overhead of USB communication. It expects that this will be particularly of interest for customers in need of in-line high-speed spectral analyses, fluorescence decay measurements, wafer thin-film mapping and similar applications.
Scans can be stockpiled at very high speed — as fast as 1.1 ms per scan for the AvaSpec-2048-USB2 and 0.1 ms per scan for the AvaSpec-128-USB2 — in the internal RAM. In addition to the 2048- and 128-pixel variants, spectrometers with 512 and 1024 pixels also are available, with larger pixel numbers addressing low-light-level and high-resolution applications, whereas the lower-resolution versions are intended for low-cost colour measurements. All are based on a symmetrical Czerny-Turner design with a CCD detector array and a fibre optic entrance connector, a collimating and focusing mirror, and a diffraction grating. A choice of gratings with various dispersion and blaze angles enables applications in the 200- to 1100-nm range. The electronics includes a 16-bit analog-to-digital converter.