Sumários
Resolution. LIGO. JWST
28 Abril 2023, 12:00 • José Manuel Rebordão
Resolution issues in holography and in imaging: the
relation between the aperture stop and the PSF, through diffraction.
Presentation of Joshua
Muller: LIGO – main concerns when selecting detectors
Presentation of Nuno
Covas: JWST – the MIRIS instrument (1st part)
NEXT CLASS
JWST – MIRIS
Holography (1 in 2)
26 Abril 2023, 11:00 • Alexandre Pereira Cabral
Setup of a Denisyuk configuration, consisting of a volume-reflection holography technique. As a recording medium, a silver halide emulsion on a glass plate will be used (a matrix of cohesive silver crystals in a transparent medium). During exposure, the reference wave and the waves reflected from the object result in an interference structure that was recorded within the emulsion.
Students produced their own objects that will be exposed in a 50 mm x 50 mm plate.
Students performed several exposures using different types of objects (including lenses or mirrors to generate holographic optical elements known as HOE.
Analysis of non-holographic technics, bases on the Peper’s ghost concept, will be shown in the lab for analysis.JWST: Cophasing
24 Abril 2023, 10:00 • José Manuel Rebordão
The NIRCam optical architecture; fileter and pupil masks. Basics of the Dispersed Fringe sensing approach
JWST: FGS, NIRCam
21 Abril 2023, 12:00 • José Manuel Rebordão
Functions of the FGS and its
architecture.
NIRCam: Architecture of the instrument.
Analysis of the functions of the filters in the filter wheels.
DHS/DFS filters and preliminary analysis
of the cophasing process
NEXT CLASS
Michelson interferometry (3 in 3)
19 Abril 2023, 11:00 • Alexandre Pereira Cabral
Setup of a Michelson Interferometer (MI), using amplitude splitting, and
analysis of the generated interferograms in several configurations.
Usage of cube beam splitters and polarisation optics to control laser beam polarization.