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Blocking Filters
The following table gives wavelength ranges of the order-sorting filters in NIRI that are used with the grisms. The Gemini identification number for each filter is recorded in data file headers.
| Waveband | Central Wavelength (microns) | Bandpass (microns) | Gemini ID | Order-sorting filter transmission plot available | Order-sorting filter transmission data available |
| J | 1.30 | 0.97-1.63 | G0209 | yes | yes |
| H | 1.69 | 1.30-2.09 | G0210 | yes | yes |
| K | 2.20 | 1.90-2.49 | G0211 | yes | yes |
| L | 3.50 | 2.90-4.25 | G0212 | yes | yes |
| M | 5.00 | 4.40-6.00 | G0213 | yes | no |
