Diffraction Gratings

Holographic Ion Etched Lamellar Master Gratings

Grating Info

Examples of Holographic Ion Etched Lamellar Master Gratings

Plane constant groove density grating

Reference Blank Dimensions(mm) Useful Area(mm) Grooves Density(l/mm) Blank Spectral Range(eV / nm)
549 00 032S 30x130x30 20x120 1200 Si
549 00 033S 30x130x30 20x120 600 Si

Spherical constant groove density grating

  • Radius of curvature: 17 800 mm
  • Radius of curvature tolerance: 1 000 mm
Reference Blank Dimensions(mm) Useful Area(mm) Grooves Density(l/mm) Blank Spectral Range(eV / nm)
549 00 078S 40x180x30 30x170 1200 Si 41-155 eV / 8-30 nm
549 00 079S 40x180x30 30x170 600 Si 21-77 eV / 16-60 nm
549 00 080S 40x180x30 30x70 300 Si 10-38 eV / 3.2-120 nm

Plane variable line spaced grating

  • VLS law: N(x) = N0 + N1x + N2x2
Reference Shape Blank Dimensions (mm) Useful Area (mm) Polynominal Coefficients Blank Spectral Range(eV / nm)
549 00 014S Plane 35x155 x30 30x150 N0 = 550 gr/mm
N1 = 0.555 gr/mm2
N2 = 4.61 10-4 gr/mm3		 Si 180-700 eV / 1.7-7 nm