History and current status of our grating project
This page will give you a short overview of the different stages of our grating project starting with the latest breakthroughs in the manufacture of these optical elements and going backwards to the very beginning in 2011. We would like to present some interesting results on our way towards developing highly efficient precion gratings.
First inhouse produced grating (December 2011)
Technical data:
Quality: low
L: 8 mm
W: 45 mm
330 lines/mm
One of the first custom made blazed gratings
This is the result of a custom-designed blazed grating on a toroidal substrate realized in June 2013.
Highly efficient blazed test grating (February 2012)
Technical data:
L: 46 mm
W: 20 mm
650 lines/mm
Blaze: 6°
First inhouse produced grating for application at the new Optics Beamline at BESSY II
This grating was especially developed for application at the newly installed Optics Beamline at BESSY II. Realized in May 2013, we expect it to perfectly fit all our needs for future projects in research and development at this new beamline.
Blazed grating on plane substrate- May 2013
Technical data:
Line density: 600 l/mm
Blaze angle: 2.0 deg.
Surface roughness: 0.6 nm rms
Top coating: 35 nm Au
reflectivity measurement - blazed grating on plane surface without coating
reflectivity measurement - blazed grating on plane substrate with AU coating
Quality comparison of two surface structures
Below you see a comparison of two gratings, one realized at HZB and one fabricated by an oversea vendor. The images of the surface profiles illustrate an improvement of roughness from 2.0 nm rms to 0.6nm rms.
Test grating for FEL tests
In March 2013, this test grating was especially produced for Free Electron Laser (FEL) tests requiring an extra flat angle.
First results in 2011 and 2012
This pictures show first results in the development of highly efficient precision gratings in the years 2011 and 2012.
