Sumários
JWST: FGS
17 Março 2025, 14:00 • José Manuel Rebordão
Specific
topics: TMA architecture, orbits, Strehl ratio. The FSM and the real image of
the PM. Sequence of real images of the PM throughout JWST instruments. EM
meaning of conjugation between planes.
FGS and
its heritage. Redundancy. SEU concept. Engineering subsystems and criticality.
FGS architecture
and its operational modes.
NEXT
NIRCam
James Webb Space Telescope
14 Março 2025, 09:00 • José Manuel Rebordão
JWST –
James Webb Space Telescope
Mission.
Platform: Space systems specificities. Architecture. Main systems. Orbit. OTE
and ISIM. FoR, FoV, iFoV. TMA architecture. OTE optics.
NEXT
CLASS
Pupil
function and PSF. Wavefront errors, individual surface contribution.
FGS,
NIRCam, MIRI. NIRSpec
Holography (class 2 of 3)
12 Março 2025, 17:00 • Bachar Wehbe
Introduction to practical
Holography, building objects.
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.
Holography (class 2 of 3)
12 Março 2025, 15:00 • Alexandre Pereira Cabral
|
Introduction to practical Holography, building objects. 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. |
Nonlinear optics
10 Março 2025, 14:00 • José Manuel Rebordão
Third order effects: spectral broadening, supercontinuum; four wave
mixing, holography, phase-conjugated mirrors.
Overview: parametric and non-parametric effects, virtual states.
Photo-refractive materials - basics
NEXT CLASS
JWST – system consideration. Subsystems
TRL, SRL.