Sumários
Sampling in 2D
1 Junho 2026, 14:00 • José Manuel Rebordão
Examples
of correct and incorrect sampling.
2D sampling
modelling, including pixel area.
Artifacts
in 2D. Anti-aliasing techniques.
Superposition
of periodic patterns. Analysis in the frequency plane. Visual MTF and Contrast
Sensitivity Function. Visibility circle.
Frequency
linear combinations leading to the Visibility Circle.
Stable
and unstable states. Applications of unstable superpositions. Examples. Hidden
information. Document security.
END
OF THE COURSE
Optical Detection Architectures
29 Maio 2026, 09:00 • José Manuel Rebordão
Superposition
of periodic patterns. Moiré patterns. Similarity with the mathematics of
interference.
Modulation
and demodulation.
Heterodyne
and homodyne detection architectures. Balanced homodyne.
Examples
of heterodyne and homodyne phase and/or amplitude modulation and demodulation.
NEXT
CLASS
Sampling
in 2D
Michelson interferometry (class 3 of 3)
27 Maio 2026, 17:00 • Bachar Wehbe
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.
Assessment
of how the MI can be used to measure relative displacements of one of the
mirrors, using a piezo electric stage actuator to move one of the mirrors.
Analysis
of several polarization optical elements (polarizers, polarizing beam splitters
and wave plates) using a polarimeter (an instruments that measure the
polarisation state of light).
Acquisition of interferograms using a CMOS 2D camera for post processing.