T-ReCS Diffraction Gratings
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T-ReCS contains three diffraction gratings and an optical flat mounted on a rotating turret. Each diffraction grating is used in first order.
Name | Lines/mm | Blaze wavelength (µm) |
Rmax1 | Dispersion (nm/pixel) |
Wavelength coverage (µm) |
Lo-Res-10_G5401 | 11 | 10.1 | 113 | 22.13 | whole window, limited by filter (normally N) |
Lo-Res-20_G5402 | 7 | 21.9 | 78 | 33 | whole window, limited by filter (normally Q broad) |
Hi-Res-10_G5403 | 90 | 10.4 | 1161 | ~3 2 | 0.94 |