Copyright Resonance Ltd., December 2011 143 Ferndale Drive North, Barrie, ON L4N 9V9       Tel: 705-733-3633         Fax: 705-733-1388 
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VUV to NIR Mini-Spectrograph
The VS7550 is a miniature Czerny-Turner spectrograph with  excellent speed, spectral range and spectral resolution with  software control of slit size, input f#, order sorting filters, grating  angle and dark exposures.  For VUV operation, the spectrograph  has a UHV window and laminar flow purge system, which allows  operation down to the window short wavelength cut-off (112 nm  for MgF2).  The spectrograph is small enough to fit in your hand  and can be fully operational in any orientation at the end of a 5-  meter cable.  Accessories include a built-in spectral calibration  lamp, a multi-spectral field flat light source and low-cost  accessories such as telescopes, vacuum adapters, and flow  controllers. 
Spectra with 3600 grooves per mm grating using H2 VUV and Hg lamps
High speed Czerny Turner optics up to f/3.2 (at CCD) Resolution better than 0.2 nm achieved with 3600 groove per mm grating User interchangeable gratings from 600 to 4200 grooves per mm 104 to 1030 NM with 1200 g/mm grating Computer controlled slit size from 25 to 400 microns Computer controlled input aperture from f/3.2 to f/8.4 Computer controlled order sorting filters Computer controlled grating angle means that full range of grating can be used by creating panoramic spectrum Laminar flow purge system allows operation down to 104 nm UHV interface with window so spectrograph can be removed from UHV chamber during bake out Stable detector employs phosphor coating to eliminate history effects of back-thinned detectors in VUV.   Sensitivity range from 100 to 1000 NM. Simple USB interface for spectral acquisition and spectrograph control with up to 10 meter cable. Extremely compact so remote operation is allowable Accessories include built in calibration lamp, Flat fielding LED NIST traceable calibrations are optional
Front 2.75 in flange can be attached to UHV chamber.  Spectrograph is isolated with MgF2 window in vacuum adapter.  Purge can be dry N2, Ar, or He.
The Spectrometer can be removed from a vacuum chamber without breaking vacuum.  This allows bake out of the UHV chamber above the non-operational limit of the spectrometer.
Changing all CCD parameters (wavelength coefficients, integration time) Slit width control Spectrograph wavelength range control Spectrograph input aperture (input f#) Spectrograph order sorting filter Pixel or Wavelength display Software activated darks Data export (XLS user selectable) Store multiple spectra and graph/save multiple spectra
Software and Drivers
A PC software package which controls all the spectrometer functions, displays and stores spectral data is provided.   Capabilities include:
VS7550 VUV/UV Mini Spectrograph