VPHGs: Volume Phase Holographic Gratings
 
 

Manufacturing capabilities
The manufacturing capabilities at the INAF - Astronomical Observatory of Brera are summarized in the following table:



PropertyValue
Spectral range0.33 - 2.50 micron
Line density200 - 3500 l/mm
Maximum clear aperture190 mm x 240 mm
ConfigurationPlane grating, GRISM
Innovative configurations*Multi-order VPHGs, multiplexed VPHGs
*See references
 
 

At the moment, there are 10 installed VPHGs in observing facilities covering different spectral ranges and resolutions (see figure below):



 
 
 
Web site credits: A. Bianco for VPHGs team - M.R. Panzera