Changes between Version 135 and Version 136 of AstroTechTalk

Timestamp:

19 Nov 2015, 10:24:32 (8 years ago)

Author:

gaessler

Comment:

hologram abstract eng

AstroTechTalk

@@ -34 +34 @@
 || '''06.11.2015''' || '''Klaus Meisenheimer''' || '''PANIC works - Lesson (still to be) learned'''[[BR]][[BR]]Exactly one year ago, on November 6th 2014, PANIC saw its first light. After the accident in March 2015 and the subsequent repair, PANIC is successfully back in operation since June 1st 2015 ("second light"). [[BR]][[BR]]Klaus  Meisenheimer will briefly shed light on the developments before first light, before putting the focus on the experience gained since June 2015. In summary, this talk will give a status report of PANIC's hard- and software, plus support and instructions for astronomical users.[[BR]][[BR]]Presentation: German                  [[BR]]Slides: English[[BR]]Questions: German, English ||
 || '''13.11.2015''' || '''Joerg-Uwe Pott''' || '''MICADO''' [[BR]][[BR]]Mikado, a game were you have to pick up sticks. While you pick up one stick you are not allowed to shift any of the others. This could be also a slogan for MICADO the first light instrument abroad the E-ELT. One of the main purposes, MICADO will be built for is measuring the relative position between astronomical objects. Therefore, it is very important that the image is stable. Any shift of objects from one to the other image, or any smearing of the image i.e. due to influences of the atmosphere will hamper the observation. [[BR]][[BR]]Jörg-Uwe will explain to us how MICADO will reach a unprecedented precision over a wide field of view to measure the relative distances of objects, what else can be done with MICADO and what our institute will contribute to built this instrument over the next ten years. [[BR]][[BR]]Presentation: German                  [[BR]]Slides: English[[BR]]Questions: German, English ||
-|| 20.11.2015 || Diethard Peter || Hologramms and their use ||
+|| '''20.11.2015''' || '''Diethard Peter''' || '''Tailor-made wavefronts - computer generated holograms in use''' [[BR]][[BR]]One might think immediately of Starship Enterprise by reading the word hologram, where virtual worlds are created holographically on the so called Holodeck or one gets reminded on 'The doctor', a Emergency Medical Hologram in Star Trek Voyager. Sadly, this technology is not that far yet. But ARGOS, the laser adaptive optics system abroad LBT, uses holograms in its calibration unit to create tailor-made wavefronts. An objective, which contains also a computer generated hologram (CGH), images a picture of the laser as it is on sky. With this the adaptive optics system can be calibrated and tested at day time. [[BR]][[BR]]Diethard will report to us his experiences with such a light source. Especially the traps, which one can fall in during design and test of such a unit.[[BR]][[BR]]Presentation: German                  [[BR]]Slides: English[[BR]]Questions: German, English ||
 || '''27.11.2015''' || '''Natalie Fischer''' || '''Planetarium show''', Haus der Astronomie ||
-|| '''04.12.2015''' || '''Dietrich Lemke''' || '''Dark lines in the spectrum of the sun'''[[BR]][[BR]]200 years ago, Joseph Fraunhofer discovered the dark lines in the spectrum of the sun and other stars during his stay in Benediktbeuern Abbey. Henceforth, he made use of them in manufacturing better lenses for his famous refractive telescopes. Only forty years later, Robert Bunsen and Gustav Kirchhoff, both in Heidelberg, revealed the physical nature of the Fraunhofer lines as the finger prints of the chemical elements in the sun. During the same time, the red or blue shift of those lines as caused by the movement of cosmic sources away from or towards us by the effect named after Christian Doppler has been discovered. This initiated the astrophysical conquest of the Universe, which is the basis of our modern view of the world.[[BR]][[BR]]Please join Dietrich Lemke on a historical journey (also) to the origins of principal astronomical techniques.[[BR]][[BR]]Presentation: German                  [[BR]][https://svn.mpia.de/trac/gulli/att/raw-attachment/wiki/WikiStart/2015-12-04_Spektroskopie.pdf Slides: German][[BR]]Questions: German, English ||
+|| '''04.12.2015''' || '''Dietrich Lemke''' || '''Dark lines in the spectrum of the sun'''[[BR]][[BR]]200 years ago, Joseph Fraunhofer discovered the dark lines in the spectrum of the sun and other stars during his stay in Benediktbeuern Abbey. Henceforth, he made use of them in manufacturing better lenses for his famous refractive telescopes. Only forty years later, Robert Bunsen and Gustav Kirchhoff, both in Heidelberg, revealed the physical nature of the Fraunhofer lines as the finger prints of the chemical elements in the sun. During the same time, the red or blue shift of those lines as caused by the movement of cosmic sources away from or towards us by the effect named after Christian Doppler has been discovered. This initiated the astrophysical conquest of the Universe, which is the basis of our modern view of the world.[[BR]][[BR]]Please join Dietrich Lemke on a historical journey (also) to the origins of principal astronomical techniques.[[BR]][[BR]]Presentation: German                  [[BR]]Slides: German[[BR]]Questions: German, English ||
 || 11.12.2015 || -- || Christmas party ||
 || 18.12.2015 || || still vacant ||