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Using broadband long-wavelength channel to increase the capture range of segment piston phase retrieval for segmented-aperture systems
Applied Optics- received 01/12/2024; accepted 04/13/2024; posted 04/15/2024; Doc. ID 518565
- Abstract: Segmented-aperture systems, such as the James Webb Space Telescope (JWST),requires fine piston alignment between primary mirror segments. Computer simulation experiments show that using a broadband long-wavelength channel, illustrated with the Mid InfraredInstrument (MIRI) onboard the JWST, can extend the capture range of segment piston phaseretrieval significantly (in the case of JWST with MIRI, up to hundreds of microns), greatlyreducing the requirements on coarse phasing.