Events 2021

Event Program from the World Interferometry Day
April 14, 2021

Here you can find the contributions of the participants
in the World Interferometer Day from last year.

Welcome to the WORLD Interferometry Day. We appreciate your interest and say thank you to all participants.

Events from the 1st WORLD interferometry day 2021

Scientific talks about interferometry

The fundamentals of interferometry as well as recent scientific developments will be clearly presented in various presentations.

Vakuum Interferometry - Status PtB
Dr. Jens Flügge, Physikalisch-Technische Bundesanstalt Braunschweig, Germany
- View presentation
Contributions to the detection of gravitational waves
Max-Planck-Institut für Gravitationsphysik Hannover

Populärwissenschaftliche Vorträge:
- „Beobachtung von Gravitationswellen mittels Laserinterferometrie“ von apl. Prof. Benno Willke
- „GEO600 – Eine virtuelle Führung durch den deutsch-britischen Gravitationswellendetektor“ von Dr. Benjamin Knispel
Videos:
- „Wo ist das Wasser? Mit Gravitation den Klimawandel erforschen“ – Interferometrie zwischen Satelliten als Werkzeug für die Klimaforschung
- „The path to LISA: The interferometers of LISA and LISA Pathfinder“ – Die LISA-Pathfinder-Mission und LISA, das geplante Gravitationswellen-Observatorium im All, nutzen komplexe Laserinterferometer, um winzige Abstandsänderungen zwischen frei fallenden Testmassen zu messen.
Surface encoder: a three-axis interferometer for measurement of precision motions
Prof. Wei Gao, Tohoku University, Japan
- View presentation
X-ray interferometry for dimensional metrology
Dr. Andrew Yacoot, National Physical Laboratory, United Kingdom
- View presentation
Holographic interferometry for structural inspection in aviation
Prof. Rozalia Kh. Makaeva, Prof. Albina M. Tsareva, Kazan National Research technical University, Russia
- View presentation
Standing wave interferometer
Dr. Hans-Joachim Büchner
- View presentation
CiS Forschungsinstitut für Mikrosensorik GmbH
- View presentation
PML Introduction
Prof. Liang-Chia Chen, Taiwan
- youtu.be/rzCdt51Y0MU
The colours of interferometry.
Prof. Peter Lehmann, Universität Kassel
- View presentation
Undifferentialand differential Fabry-Perot displacement measurement interferometer
Prof. Yung-Cheng Wang,
National Yunlin University of Science and Technology Taiwan
- View presentation
Coherence scanning interferometry
Torsten Machleidt, Gesellschaft für Bild- und Signalverarbeitung (GBS) mbH, Ilmenau / Germany
- View presentation
Does interferometry work?
Dr. Peter de Groot, Zygo Corporation, USA
- youtube.com/watch?v=WCPQLZrZfZM
Heterodyne Laser Encoder System for X-Y Positioning Stage
Prof. Chung-Ping Chang, National Chiayi University Taiwan
- youtu.be/sbFjmiRZSaQ
Testing not only of optics
Thomas Blümel, Ricarda Kafka, TRIOPTICS Berlin GmbH, Berlin, Germany
- View presentation
Optical form metrology: Tilted Wave Interferometry
Christof Pruß, Universität Stuttgart, Germany
- View presentation
Spatial Heterodyne Spectrometer: a Modified Michelson Interferometer
Ardian Gojani, Bundesanstalt für Materialforschung und –prüfung, Berlin, Germany
- View presentation
A brief review of the development of laser interferometry at the TU Ilmenau
Prof. Eberhard Manske, Technische Universität Ilmenau
- View presentation
Differential laser interferometers for high-end applications
Dr. Denis Dontsov, SIOS Meßtechnik GmbH, Ilmenau, Germany
- View presentation
Mach-Zehnder-Interferometer von ZEISS aus dem Jahre 1944
Prof. Dr. Timo Mappes, Deutsches Optisches Museum Jena, Germany
- View presentation
Working group 5.43 of PTB to the World Interferometry Day
Der Meter: Darstellung der SI-Einheit für die Länge
- View presentation
Virtuelle Labortour: Interferometrie an Messblöcken
- View presentation
Vorbereitung der Kalibrierung von Endmaßen
- View presentation

Lecture in the auditorium of the TU Ilmenau,

Photo: Sebastian Trepesch

Basics and demonstrations

Various experiments and demonstrations show the operation and high-precision measurement with interferometers in practice.

Interference of Waves | Superposition and Interference in light and water waves

https://www.youtube.com/watch?v=CAe3lkYNKt8
Interferenz bei der Überlagerung von Wellen

https://www.youtube.com/watch?v=__1Dyh6frwE
Interference of Light by Dr. Vishal Jain

https://www.slideshare.net/mobile/VishalJain8/interference-of-light-81557982
The Michelson Interferometer

https://opentextbc.ca/universityphysicsv3openstax/chapter/the-michelson-interferometer/
Louw Feenstra and his interferometer

https://youtu.be/kSzgz0CJ80o
The iridescent colours of soap bubbles

The iridescent colours of soap bubbles not only fascinate young and old, they also open a bridge for our senses to the effects of the nanometre dimension.
The video shows the interference on a thinning soap skin in different spectral ranges. This experiment is part of a presentation that introduces children to the effects of nanotechnology at the Centre for Micro and Nanotechnologies at TU Ilmenau (responsible Dr. Arne Albrecht).

Watch video
Length measurements over long distances
... pose a challenge to
- the correct dimensioning of the optics,
- the radiation power and
- the environmental detection.
To the World Interferometry Day, the SIOS shows that one can make measurements over more than 80 m with a small compact interferometer.

organizer:
SIOS Meßtechnik GmbH
- View presentation

Photo: TU Ilmenau/ PMS

Events in Ilmenau

Live-Action in Ilmenau, 14.04.2021
Am Welttag der Interferometrie zur blauen Stunde, also in der Dämmerung, werden an der Lupe vor dem Ernst-Abbe-Zentrum farbenfrohe Interferenzen zu sehen sein. Die Organisatoren laden Sie hiermit herzlich ein, unsere kleine Show zu genießen, natürlich unter Beachtung der geltenden Regeln!

On the World Interferometry Day at the blue hour, i.e. at dusk, colorful interferences will be seen at the magnifying glass in front of the Ernst Abbe Center. The organizers hereby cordially invite you to enjoy our little show, of course in compliance with the applicable rules!
- View presentation
Laser harp
Experience Prof. Eberhard Manske with a musical contribution on the laser harp. The head of the Department of Process Measurement and Sensor Technology and co-initiator of the World Interferometry Day is musically active in various genres in his spare time. The combination of laser technology and music reveals itself particularly spectacularly in the laser harp.
- View presentation
Not entirely serious vision of future applications of interferometry ...
or: we also need a bit more humour in science

First coffee machine with integrated laser interferometer
- View presentation

Further Links

All participants received a certificate of participation and a T-shirt as present. Prof. Danzmann from the Max Planck Institute for Gravitational Physics Hannover says best thanks.