| The
Blue and Red Etalon were built by ICOS for the OSIRIS project. |
OSIRIS Blue Etalon
| Etalon Wavelength Range | 375-675 nm |
| Etalon Nominal Cavity Separation | 5.54 micrometers |
| Number of orders of Interference | 34.45 orders at 632.8 nm (10.9 micrometers) |
| Minimun thickness of the air layer | less than 2 microns |
| Etalon Throughput | > 98% at 633 nm |
| FWHM of etalon transmission peak | 1.32 nm at a wavelength of 649.3 nm |
| Wavelenght Selection accuracy | 0.57 nm/step (552 steps for one order of interference at 632.8nm) |
OSIRIS Red Etalon
| Etalon Wavelength Range | 600-1000 nm |
| Etalon Nominal Cavity Separation | 4.47 micrometers |
| Number of orders of Interference | 26.9 orders at 589 nm (7.9 micrometers) |
| Minimun thickness of the air layer | 1.71 microns |
| Etalon Throughput | > 96% at 633 nm |
| FWHM of etalon transmission peak | 3.6 nm at a wavelength of 700 nm |
| Wavelenght Selection accuracy | 0.48 nm/step (665 steps for one order of interference at 632.8nm) |
Last update August 8, 2005, by Héctor Castañeda