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Colour holography in optics courses at Lund Institute of Technology

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ladies and gentlemen of thank you all also my name is many of empirical so I'm from new and in Sweden and if you don't know where this is close to rather close to to Copenhagen in the sciences Sweden I'm working on all of the both as a researcher and lecturer and unfortunately most of the time I was lecturing optics and that substance the
outline of my talk is the following I will say something about history well already enhances said several things already about a I was just take some few uh I would say something about courses in blue that we have an and I will also go into the equipment will use for correlograms and how we can control exposure I will show you and some pictures of the hollow ground I have also here some the pictures that 2 students from a then I will go into some teaching of overview 2 so will be also lecturing in a way and I will also say something about the quality of the that we have here in In
doing so already in 1964 the thing that makes proposed a way to do correlograms but the problem well in that case the and the uh said they would use 3 different means because of the problem of cross-talk but this means that we have rather complicated uh set up so in 1964 depending on the and their use in step a small band of material and in that case they could produce a transmission of programmes in color and each committee and also used 66 then you follow grounds to to make Colorado a telegrams and in this case case no bases are used are needed for and hence also told about who broke down where wearing they use document use document gelatin and from plates and the document for the red metal directly for the room and green and outperform the red because the material the time for blue and I was much of and it wasn't mentioned that you could also do spatial multiplexing and decoded reference beam to obtain the and
as some in the audience knows that there was rather important step forward when and you will and Solomon and use the new material from that could produced good Colorado and we know about the other carbon has and we could generate this file and they have using a beam reflection holograms and using the Western processing technique and also Russian much this combination was a very successful things alright in 2000 in the shop presented at new the marginal French emulsion with many ultimate the and they which which was very good in small size crystals and you maybe I can say something about my experiences my 1st experiments on on the following around were in the beginning of the seventies where we combine the which combines the 75 right with a blue plates the 56 for a transmission hologram and we also store well and at that time we use that the concatenation based around that helium neon laser and of course we have the problem with the scattering of the blue line of the hollow-gram was quite good and how they later during the eighties and and nineties we tried to also make 3 color this was so that we try to with him in here here even going based also but it wasn't until the and could use rationalization that we got the and very good step if or
then the 1 important thing in this case is of course to see on the common ticity diagrams and do you and so market they found out that the the 3 points 0 20 82 and 647 and for 50 k would be better than the combination that was used mostly at that time uh 5 114 and for DA for you don't get to what is 1 48 and successfully and we use so as I said the Union Cabinet so we were a bit to a little dog and I I don't think it's really necessary to cover all and the blue the
courses we have in in the the they are from non technology if elected to the engineering mechanical engineering industrial economy they make you for our in all of their feet and we have also to separate courses where people students can go deeply into pornography and I can't say that last year we made about 5 to 600 cholera programs in the set up so
I will just say some thing about equipment in fact I presented on on the 2000 conference incentive program but there are some modifications so we have now instead of helium can invasive we have as you can see uh cobalt blue laser which is going out for for a 73 and we have it immediately and also at the moment I can't do this as you can see in this system to to be able to the adjusted means directly we have to me or for the blue and the red laser so we can exactly overlap all the beams in the spatial filter you can also see in the picture there is a diode laser also here we can and do that diode-laser laser to test what happens if we use this and you can also see that it's in it's possible to expose the larger plates the minimum separates sector the Proc here you can
see a picture all the system to the left of the blue laser and a new so that it's not this size instead of something like 3 meters and the output is a 50 milliwatt instead of 125 about chemical laughter and on the right we we have and the other part of of the the so that relates the doesn't have to be out the table but this is just because you have not yet had time to move of table OK so to this blue laser
is in fact a plate and a server that is produced in Sweden by cobalt and it's just a diode-pumped laser and we you which uses another crystal than the normal for diagram and I places and 1
important part in this set up this this plate holder that we use because we we want all the students to have their own hollow ground so we need to do a common grounds In formalization of lastly you cannot only concentrate on our review we also have to discuss it from Austrian such things so we have a special place told the where we can have a food in for programs and expose them sequentially so
just to Tony on here you can rotates the system
the system Optronics and you can see here this with that Plato and you loaded from about here and then rotates and so you have for different positions and in In
this case we also have an exposure control that it's computer based and we have this is typical example of what what we have this exposure times we as you can see that uh plates will use well know we use something like and way which over years and would and there is the there are not so sensitive to blue so that is why we have 42 % we use a total exposure 1 thousand 500 my produced per square centimeter and you see the top the not at the time of exposure 39 seconds because start with different places at different times of the total times just 39 seconds but there is also
waiting time because we're rotate the so in the so called the plates and the waiting time must exposure time gives you the total exposure time for exposing the place of 10 minutes and then we we have a new group coming in and then we have developed all 8 plates in the same way I've tried to use the dialog laser instead of the laser because I can't find that the query instances not all and optimize over good for for this depths of objects by the we have had several problems with the a mobile parts and infringes from 2 different views and in the
photograph uses just 1 1 and I would like it you I would be pleased if you with the domain of a good dialog laser not to shoot is not too expensive to the use of this is that set that Plato law for making a larger size 20 about 25 programs and I have some all around the world made by the students of the uh and some also of 20 but 1 of the 5 centimeters or and also so and I just to say something about teaching polarography
I mean and and when when you so you have grammar of course immediately understand this is a
3 dimensional image but what I was that is the rather difficult task to if you have a lot of students that has no background and wave optics sorts things so that we use different
models this is simple model more and more this is difficult models random urine model model more of a pattern momentarily took the rating stands for some students complex description or wave from the complex description wavefronts and and the work and destruction laughter while the is while the 2nd right to the really it's really human beings will there all In this case I know that something is true however is also In so why are you talking well all you know that's the it's the the
recording and there the reconstruction of the image that is I mean like a to reconstruct the limits of you can have a something that were story while we can use this as a mayoral and logic we can say that the hologram can be seen as the number of nearest and at the top you know that an object is if you have an object in front in the area of a three-dimensional image behind and for a distant points you like a prime and that there a lot like any here you get the distant image point of former nearby objects in an image part and so you can say that the hollow-gram axis is that that you have a lot of small tiny mirrors inside the layer and for instance you can create the waves order beams from a prime by just having some some positions for the minerals and some other positions or angles areas yeah you you you will have the of more divergent B and that that gives you the three-dimensional the
information what we have in fact real model all this the density and the here is a a model of program we 625 nearest and they are out there are 3 screws on all of nearest and so on you see underscoring in here in front of the image created by a light source of all of them nearest and so you can we can say that and 1 position we have 1 of the image like here and when we change the position of the screen we have riot we
heard in the 1st day and something about moral pressed the for and do them we know that if we have 2 waves with with velocity of light even though they are moving very fast there is a stationary patterns and this is what we call that is what the recording the hollow-gram and if you have another the angle between the beams you you will get find system well let's now there have relied on
on just this hologram
well I don't know if you can see produced from so
the out of the is of this about
how people all you this is so this
means that if you have a
stationary pattern you
can get a new
wave and Of course this was very simple normally we have spherical waves so it
would have spherical wave the plane way we also get that's
some stationary and system I mean if it's
not and this will not be stationary but
if it's if if they
are couple interface you get
something like this so this is if you recorded system or if the recall of the Our cannot help you
really about maybe you
then you can see that the
stationary pattern and the the plane wave
creates but a new way of
spherical wave coming out from the the In fact and or from a hollow ground and of course if we do it the
opposite way you have
convergence the she didn't say that the area it is
I think it's the more In this 1st law and you can also use momentarily lecture at field so that more material we we have also a program on if we want was set up like look there and to the right the from the Canaanite doesn't work all of them memory can go back here that the from 1 source
get this from the 2nd you get the other media and see and you you will see fluctuating
elected field but there is always a constant pattern behind and that is what you have the and which is the heart of can I think we can also of course make that and use the
grating model and calculate the great things and then and in this case you you can say that the hollow-gram is a great thing where the great and constant is a constant it's changing and so down show that you really get the three-dimensional
image from that if we have the students that are well aware of wave optics and if we for instance we do it some experiments in digital of the field then of course we need the complex formula
of great construction the and I will just say a few words about 7 cholera hollow grounds that we have on some of our courses to and the system that is to the left and was introduced and used the course together with multi liquid and I don't remember exactly what year it was about and you can you can reuse last objects in front of it and this is very good I mean this was were very popular for the what people interesting in art and began to the right you can see that the coast live system the the player told the where we use film and we just
use factory to hold and is to the left without some typical object placed on a glass plates and that it had this is my million demanding and she made this beautiful hollow-gram on on this
setup and that is to the left we have another form not this morning about and she also she posted once with no what vacuum so you have some free she liked to have that in the in the picture and to the right we have also a try to combine separated images to risk reviews of now the use of it in sky and you can see what was the good cholera rendering part of course then the viewer and changes in position to to get his favorite they're the favorites of dollars infection I hope we will improve in our equipment to get even better hollow around with we will student loans lot on this all over the world of how it you can see some programs around some bigger holograms on there are for what students right thank you and if may have some questions you so that findings of the other things we have 1 of 2 people this maybe being he will hold in 10 years we profess to be at the end will here with whiskey at cold artificial hold them using directly this thing 670 kilometres experiment graphical features you asking about the price he was the the uh but now I I now we're while using In the vision of course but in sync governing the peak Bible meters wavelength is the same almost it's getting what is it is very difficult to do get single-frequency being the usually in the perfect you give pool but went well established in search of settlement building predicted it at that but that's turning the peak 8 meters and better at 670 kilometers is very cheap we could give the ball up the price of fluff picking need let's places but picture controller and the title of the present that little ball won't all the devil would that laser get entered into just a bit is involved uh In general the general will 400 it's in thinking but if I ask you to because nation because you check all always if he I think that is interesting for everybody so if you could have something maybe make do we can mention that there are a huge issue the 2nd is a very interesting file above the city because 1 period after conditioning Afghanistan the sneezing could enter papers about College of cutting around simple this seriously and this for political might and say nothing about 100 years I mean we can all be we have around 100 papers also on color or period 1 of my papers where every single 1 really existed but in this review mining and is free just highlight a few any hot then thank you very much for the presentation and we have to move along
Technische Optik
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ATM
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Datensatz
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Metadaten

Formale Metadaten

Titel Colour holography in optics courses at Lund Institute of Technology
Serientitel 7th International Symposium on Display Holography (ISDH 2006)
Teil 48
Anzahl der Teile 61
Autor Pettersson, Sven-Göran
Lizenz CC-Namensnennung 3.0 Unported:
Sie dürfen das Werk bzw. den Inhalt zu jedem legalen Zweck nutzen, verändern und in unveränderter oder veränderter Form vervielfältigen, verbreiten und öffentlich zugänglich machen, sofern Sie den Namen des Autors/Rechteinhabers in der von ihm festgelegten Weise nennen.
DOI 10.5446/21305
Herausgeber River Valley TV
Erscheinungsjahr 2012
Sprache Englisch

Technische Metadaten

Dauer 28:48

Inhaltliche Metadaten

Fachgebiet Informatik
Abstract Several physics courses are given at Lund Institute of Technology. In the basic courses on ray and wave optics, holographyhas played an important role both in stimulating the students to curiously investigate the optical world and as an important visualisation of some obvious and interesting parts of the courses. To meet the need for basic laboratory experience, a holographic laboratory has been built based on three holographic tables. One large set-up is designed for making full colour holograms. Normally the students make holograms in the size 4” x 5”, but it is also possible to make holograms up to 30 x 40 cm. For students interested in a deeper understanding of holography we have another large table where they can make one step rainbow holograms on film in the size 30 x 40 cm.

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