On March 16th 2004 grisms made by Spectra-Physics were received in the IAC.
Six grisms have been manufactured by Spectra-Physics (Rochester, New York, USA). The grisms are MBR_G1, MBR_G2, BR_G1, BR_G2, IR_G2.1 and IR_G3.2. Each grism has been named following that criterion: XR_G#, Where: X is: “I” when it is an intermediate resolution grisms, “B” when it is a low resolution grisms “MB” when it is a lowest resolution grisms and # is: the ordinal number of the grism.
The high resolution grism are being manufactured at this moment, and we expect the delivery by the middle of the 2008.
| Grism Name | Central Wavelength [nm] | Wavelength Range [nm] | Resolution |
| MBR_G1 | 442 | < 370 - 935 | 325 |
| MBR_G2 | 665 | <370 - +1000 | 327 |
| BR_G1 | 473 | <370 - 830 | 501 |
| BR_G2 | 717 | <370 - 1195 | 582 |
| IR_G2.1 | 545 | 370 - 758 | 989 |
| IR_G3.2 | 744 | 525 -1005 | 1118 |
| TBD | 475 | 375 - 600 | 2000 |
| TBD | 400 | 350 - 500 | 2500 |
| TBD | 518 | 425 - 625 | 2500 |
| TBD | 656 | 525 - 775 | 2500 |
| TBD | 865 | 725 - 1025 | 2500 |
Last update April 10, 2008, by Héctor Castañeda