Embedded Files
Full testbed name
Full testbed name
Managing institution
Managing institution
Observatoire de Paris
Main scientific focus
Main scientific focus
Comparison of very high contrast imaging techniques for ground- and space-based telescopes: coronagraphy, apodization, wavefront sensing, DM controls, coherent differential imaging at 1e-9 contrast levels from 500 to 900 nm.
Environment of the testbed
Environment of the testbed
Clean room, controlled in temperature and humidity.
Optical design map
Optical design map
Injection source
THD2 design
Key hardware items
Key hardware items
3 BMC DMs in cascades
one TT mirror
phase masks coronagraphs (FQPM, EOPM, vortex, DZPM, SLPM, and others)
3 laser diodes (640nm, 700nm, 785nm)
one supercontinuum source (with lots of narrow/broad filters from 500nm to 900nm)
Current status
Current status
On activity with multiple of collaborations (see website).
Software language
Software language
Labview for the bench control (motors, DMs, etc) + IDL for calculations
Is this software shared?
Is this software shared?
It could be but not sure how useful to another bench it can be.
Reference papers
Reference papers
Current limitation of the THD2 bench: the scatter issue, Potier et al. 2018
Active minimization of non-common path aberrations in long-exposure imaging of exoplanetary systems, Singh et al. 2019
Exoplanet direct imaging in ground-based conditions on THD2 bench, Potier et al. 2019
Comparing focal plane wavefront control techniques: Numerical simulations and laboratory experiments, Potier et al. 2020
Google Sites
Report abuse