Sumários
JWST Cophasing technologies Reference systems, again
11 Abril 2025, 09:00 • José Manuel Rebordão
Reference systems: examples from GAIA and PLATO.
Callibrations
JWST - Phase diversity. Overview of the cophasing
process. Pupil Imaging Lens (PIL).
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JWST: brief reference to subarrays
Introduction
to Gravitational Wave observatories
Spectroscopy (class 3 of 3)
9 Abril 2025, 17:00 • Bachar Wehbe
Introduction
to the operation of spectrometers and monochromators.
Study
of the dispersion of light, the properties of diffracting elements and how they
are used in monochromators and spectrographs. Spectral characterization of
non-monochromatic light and its analysis in bench top spectrographs.
Spectroscopy (class 3 of 3)
9 Abril 2025, 15:00 • Alexandre Pereira Cabral
Introduction to the operation of spectrometers and monochromators.
Study of the dispersion of light, the properties of diffracting elements and how they are used in monochromators and spectrographs. Spectral characterization of non-monochromatic light and its analysis in bench top spectrographs.
Building a prism and grating Spectrographs.Cophasing technologies
7 Abril 2025, 14:00 • José Manuel Rebordão
Phase: Zernike decomposition of phase distributions.
Phase retrieval: The Gerchber-Saxton/IFTA algorithm;
kinoforms; examples similar to JWST needs
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Phase Diversity
Introduction
to GW detection technologies
JWST – miscellaneous. MOONS. Introduction to cophasing
4 Abril 2025, 09:00 • José Manuel Rebordão
NIRISS AMI – Conclusion
MOONS – selection of objects and delivery to the
spectrographs (IFU-like). Relevance of the field curvature at Masmyth focal surface
and role of the field flatenner. Irrelevance of the focal curvature for JWST.
QUATERNIONS: rotations in 3D, rotation matrices,
systems of Euler angles, warnings concerning different systems. Unit
quaternions and how they can be used to implement rotations of the reference
systems. Properties of quaternions. Operations with quaternions. Conversion
from/to quaternions to rotation matrices and Euler angles.
JWST COPHASING: HW and SW elements available to
co-phase. A brief overview of the steps to cophase JWST.
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Cophasing
elements and technologies. Phase modelling.