CHELMSFORD, Mass., Oct. 2, 2012 — McPherson Inc.’s vacuum-ultraviolet spectrometer, Model 234/302, now delivers improved efficiency over a wider range. Two new diffraction gratings are available. For the vacuum-ultraviolet, the aluminum magnesium fluoride-coated grating operates from 100 to 200 nm. The new lower groove density aluminum-coated grating works through the nonvacuum-UV-VIS regions. These join the platinum-coated grating that is used at wavelengths shorter than 120 nm (>10eV.) The gratings extend the optimization of the 200-mm-focal-length spectrometer over the 30- to 550-nm range. In combination with CCD detectors, adjustable slits and f/4.5, the spectrometer performs efficient, sensitive data collection. It is useful for measurements of extreme- and vacuum-ultraviolet, and UV-VIS radiation and emission spectra with subnanometer spectral resolution. Adjustable slit width provides for best light throughput and for better spectral resolution to resolve closely spaced spectral lines. Scanning gratings allow users to reach longer or shorter wavelengths and to collect different simultaneous wavelength swaths for general-purpose spectroscopy, plasma physics and process monitoring without compromising resolution or signal strength. The device is available with standard light sources, detectors, reflective condenser optics and vacuum differential sections.