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The manufacturing capabilities at the INAF – Astronomical Observatory of Brera are summarised in the following table:



Spectral range

0.33 – 2.50 micron

Line density

200 – 3500 l/mm

Maximum clear aperture

190mm x 240mm


Plane 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:

Some examples of the manufactured VPHGs: