Questions about Diffraction Gratings

10.6 microns

  • Soda Lime glass (float): 9×10-6/degreeC
  • Annealed Borosilicate (Pyrex): 3×10-6/degreeC
  • Zerodur: 0.1×10-6/degreeC

The limit is ±0.5% but most gratings are typically much better.

Dispersion required and efficiency at peak wavelength are often trade-offs. Coarse gratings, for example, generally have higher peak efficiency but lower dispersion.

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