Developing achromatic coronagraphic optics for LMIRCam and the LBT
Abstract
The Apodizing Phase Plate (APP) is a simple optic that provides coronagraphic suppression of diffraction without the need for any focal plane occulters. We present the design of a broadband APP (the BAPP) for LMIRCam that is optimised for the direct imaging of cool extrasolar giant planets around nearby stars at thermal infrared wavelengths. These optics have a high throughput and require no precision alignment. We cover earlier results using a chromatic APP, the basic principle and manufacture of the optic.
- Publication:
-
Optical and Infrared Interferometry II
- Pub Date:
- July 2010
- DOI:
- 10.1117/12.856819
- Bibcode:
- 2010SPIE.7734E..2PK