Other
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.539..641v&link_type=abstract
In: Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets, 22-25 A
Other
1
Nulling Interferometers, Earth-Like Planets
Scientific paper
Nulling interferometry is a direct method to detect earth-like planets. To determine whether a planet is earth-like spectrometry can be performed which requires a broadband optical input signal from the planet. Nulling interferometry should decrease the broadband (λ ≍ 6-18μm) star signal by about a factor of 106. For an ESA contract a nulling interferometer breadboard has been designed, manufactured and tested by TNO TPD together with and as subcontractor of Astrium GmbH in Germany. The set-up enables testing of two different phase shifter types (dispersive phase shifting and field reversal), two different star/planet simulator designs and consists of three sources, a star source, a planet source and a control source. The optical path difference is actively stabilized using an adaptive control scheme and a piezo activated cat's-eye delay-line. The bandwidth of one star source equals 1550 ± 15nm. First tests with this source at TNO TPD resulted in an optical path length stability of 0.5nm rms and a stable, repeatable nulling depth of 30000 (3.3×10-5).
Doelman Niek J.
Flatscher Reinhold
Sodnik Zoran
Vink J. P. H.
No associations
LandOfFree
DARWIN nulling interferometer breadboard II: design and manufacturing does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with DARWIN nulling interferometer breadboard II: design and manufacturing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DARWIN nulling interferometer breadboard II: design and manufacturing will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-918116