Performance
- Contrast level at 5e-9 in monochromatic light between 2 and 12 λ/D, at 785nm
- Contrast level below 5e-8 over a 37% bandpass between 5 and 12 λ/D, with Δλ = 250nm centered on 650nm
Main characteristics of the THD2 bench
- Source unit
- broadband (450 to 950nm) supercontinuum source + filter wheel
- Laser diodes at 638nm, 705 nm, and 785nm
- Flat-field source at 650nm
- Fluxmeter and spectrometer (continuous measurements)
- 3 active mirrors
- Tip-tilt mirror
- 34x34 Boston Michromachines
- 32x32 Boston Michromachines
- 3 detectors
- Science channel : 2 detectors (100Hz/3e-RON or 200Hz/18e-RON)
- Low order wavefront sensor channel : 500Hz/18e-
- Calibration and housekeeping
- Motorized alignements
- 10 temperature/humidity sensors
- Controlled flux/spectrum
PDF document for more details on the bench configurations and on performance (May 2016).
