Development of misalignment condition of a rotational shearing interferometer to detect extra-solar planets

Maximiliano Galan; Marija Strojnik; Gonzalo Paez

doi:10.1117/12.734484

26 September 2007 Development of misalignment condition of a rotational shearing interferometer to detect extra-solar planets

Maximiliano Galan, Marija Strojnik, Gonzalo Paez

Author Affiliations +

Proceedings Volume 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV; 66781K (2007) https://doi.org/10.1117/12.734484
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

We are interested in detecting planets around nearby stars by direct methods. Previously, we developed the radiometric and imaging conditions for detection of extra-solar planets. With star to planet irradiance factor of 10⁵, it appears that the interferometric method is the most likely to produce adequate signal. A rotational shearing interferometer (RSI) may be used to cancel the infrared radiation of the host star, allowing the detection of the planet. We have established the conditions for star-radiation cancellation with an RSI. Among these conditions, we have that the star must be on the optical axis, and that the phase difference between the interferometer arms must be π. Nevertheless, the ideal conditions are almost impossible to achieve. Therefore, we have analyzed the caused effect when we consider that the star is not on the optical axis, and an arbitrary phase difference is included. In this work, we extend the study considering the interferometer misalignments.

Citation Download Citation

Maximiliano Galan, Marija Strojnik, and Gonzalo Paez "Development of misalignment condition of a rotational shearing interferometer to detect extra-solar planets", Proc. SPIE 6678, Infrared Spaceborne Remote Sensing and Instrumentation XV, 66781K (26 September 2007); https://doi.org/10.1117/12.734484

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