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Coronagraphic Amplitude and Phase Correction for Detecting Planets
- Publication Year :
- 2003
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 2003.
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Abstract
- Detection of earth-like planets around other stars using coronagraphy requires the optical beam into the coronagraph to be extremely uniform in both phase and amplitude. Errors in phase can be corrected using a deformable mirror, and error in amplitude can be corrected using a spatial light modulator, both in the pupil plan,a. These corrections can be combined using a Michelson interferometer. If amplitude corrections of only a few percent range are needed, the required accuracy of 10 (circumflex) -4 can be obtained with spatial light modulators with the modest dynamic range of 8 bits.
- Subjects :
- Lunar And Planetary Science And Exploration
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Publication Type :
- Report
- Accession number :
- edsnas.20030053084
- Document Type :
- Report