Optica Agora

We continue with the same paper of phase retrieval tomorrow.

 Dear all,

The first session of Optica Agora of 2011 starts on 2nd February at 12.15pm in our optics library room E009. 

We are going to discuss  the paper on phase retrieval from intensity measurements in optics, for the first two weeks and then for the last two weeks we will discuss RCWA method applied to optical cases particularly grating.. For the first session (2nd february) we will discuss the first four sections of the following paper

"Phase retrieval algorithms: a comparision" by J.R. Fienup.

It can be found here  

http://digitus.itk.ppke.hu/~matyi/optika/Phase_Diversity/AO82_PRComparison1.pdf

cheers,

Nitish Kumar 

Dear all

In the next Agora session we are going to continue to discuss the last part of the previous paper.

Kind regards

Alessandro 

Dear all,

in the next Agora session I would like to discuss about interferometric measurement of the temperature dependence of an index of refraction.

I found a recent paper about it by Dupouy at al.  from the Univerisite’ de Toulouse, in which they explain their methods in order to do that:

http://www.opticsinfobase.org/abstract.cfm?uri=ao-49-4-678

please have a look at the first 4 paragraphs so we can discuss about it during the meeting.

ciao,

Ale 

In the next agora session (it will be on Thursday 2nd of December, food will be provided)  we start a new subject entitled Schlieren interferometry.

This type of interferometry is interesting to measure temperature and velocity of fluids. 

Therefore, I suggest you to start reading the following paper:

Schlieren interferometry. An Optical Methods for determining temperature and velocity distribution in liquids

J.Bruce Brackenridge and W.Paul Gilbert, vol. 4, No. 7, 819, 1965 Applied Optics.  

Ale

Dear Agora enthusiasts,

 The session of next week is going to be on TUESDAY (23/11/2010) because some of us are not going to be in Delft on Wednesday.

For this session we will continue reading the paper by Steven Chu. We will star on the second column of the second page, and mainly focus on the techniques they used to do their measurements.

 For those who would like to have a better picture of the setup they use for this paper, please have a look at this other one

http://prl.aps.org/pdf/PRL/v55/i1/p48_1

Kind Regards

 Adonis 

Dear friends,

In our next Agora session we will travel inside the exciting world of cold atoms. For that I propose to read the paper by Steven Chu, ‘Trapping o Neutral Sodium Atoms with Radiation Pressure’. It can be found in scratch inside the Optica Agora folder with the name 17112010_MOT.pdf. It can also be downloaded from 

 http://prl.aps.org/pdf/PRL/v59/i23/p2631_1 

 See you on Wednesday at 12:30!!

 Cheers

 Adonis 

Dear all,

Due to the visit and talk of Dr. Philippe Lalanne today, we will postpone the Agora session of this week. We will have it on Friday (November 12th) at 12:30, as usual in the Optical Library. Please read the previous post: Optical Tweezers, to know which sections of the paper we are going to discuss.

Regards

Adonis 

Dear friends,

This Wednesday (November 10) we will continue our trip on optical trapping. This time we will focus on the principle and applications of Optical Tweezers. For that we will read sections VII and VIII of the paper by Ashkin (same of last week), seams long but there is not much theory in it, it is mainly about applications.

On the other hand, the theory is based on geometrical optics, so we can have a nice discussion if we think about the effect of reflection, index of refractions, etc.

See you on Wednesday at 12:30

Cheers

Adonis 

Gopika has transfered the Agora Trophy to Adonis for the month of November!