MICADO - the 1st Light Camera for deep obersvations with the 'European Extremely Large Telescope', the 39-m ESO/E-ELT
MICADO is one of the two instruments that are currently defined by ESO as the First-Light Instruments (one camera and one spectrograph) for the E-ELT. The 39-Meter telescope will be begin its operation with this camera which obtains for the first time stellar light for analysis.
Fig.1: The MICADO First-Light Camera as a concept study at the Nasmyth focus of the E-ELT. The hexpod-like structure supports the optical bench of the Adapative Optics system (above), it carries and rotates the large vacuum vessel with the cold camera optics (below). As the central instrument structure it links the camera with the telescope incl. necessary adjustments.
Key Parameters of the MICADO Camera
|Wavelength coverage||0.8 - 2.4 Âµm||extension into 0.6Âµm desirable, but AO performance insufficient|
|Field of View||> 30"; ~60" prefeerred||enables study of resolved steller populations and high-z galaxies|
|Image Quality||70% Strehl lambda=1Âµm||determins the metric for budgetting|
|Spatial Sampling||3 milli-arcsec [mas]||fixed pixel scale|
|Astrometric Accuracy||50 mikro-arcsec [Âµas]||relative accuracy across the full FoV of a single exposure|
|Spektroscopic Resolution||R ~3000||enables probing btw. OH lines|
|Photometric Accuracy||0.03 mag||limited by PSF fitting|
|Throughput||> 60% of camera||depends on AO performance & thermal background|
|Filters||2 wheels x 20 filters||w/o opnening cryostat|
|Instrumental Distortions||TBD||Stability over time e.g. thermal prevails distortion|
Fig.2: Simulated view of a high-z galaxy as it would appear in MICADO (left) and for James-Webb-Space-Telescope (right).
Fig.3: Comparative view of observations and simulations of a crowded field, the center of the globular cluster Omega-Cen; upper row today's observations with VLT, lower row simulated view of James-Webb-Space-Telescope and MICADO at the E-ELT.
 Davies, R. et al., "MICADO: the E-ELT adaptive imaging camera", SPIE Vol. 7735, 77352A (2010)
 Clenet, Y. et al., "SAMI: the SCAO module for the E-ELT adaptive optics imaging camera MICADO", SPIE Vol. 7736, 77363Q (2010)
 Magrin, D. et al., "MICADO: optical configuration, performance, and folding", SPIE Vol. 7735, 77355G (2010)