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Laser Pointer Holograms
kgb1001001 writes: "A couple of instructors at Lake Forest College and the Kyoto Institute of Technology have put together a nice little page on amateur holography using laser pointer diodes. This home-page gives enough information to get started and also includes an order form for the photographic plates and chemicals needed to develop the holograms. Also, another page discusses the same techniques and materiels, but comes with some nifty pictures (2-d of course) of the final outcome."
Draw them by hand using a compass and plexiglass.
324006
A lot of companies, sports teams, and record labels for example, have started using holograms as a certificate of authenticity and now that Everyday Joe can make holograms with a few supplies they will have to find something new to spoil the deeds of counterfeiters.
Ascii artist &
This is the kind of stuff that should be spread among all students... it's so cool that it makes me puke :-)
That's the best way to spread the love for science and to make our curiosity take over our minds... that's the kind of stuff that makes the world go forward.
Well done, keep up the good work!
Here is an informative page about creating your own holograms, and the different types.
Your hair look like poop, Bob! - Wanker.
I knew I'd eventually use those pointers for more than annoying people.
d ucation/Light_and_Optics/Holography/
http://www.shadow.net/~holodi/holobook.htm
This seems to be a rather popular endeavor. Further resources:
http://directory.google.com/Top/Science/Physics/E
How long until we have instructions on how to make a Holodeck?
Laser pointer holography was originaly developed by Frank DeFreitas. His web site http://www.holoworld.com/holo/diode.html has many pictures of his work. Quite a marvel. You should buy his book. It is very informative. It's about 17 bucks from Amazon.com Its very helpful and takes you step by step in the process and a bit into the history of holograms etc. I'be had great success with his process. It's a bit harder to find his holographic plates, and this isn't exactly the cheapest thing in the world. The plates cost me US$60 for five or six! But the results are great. You CAN'T use this for any kind of forgery because the holograms are on a glass substrate. I suppose it is possible to put it on plastic somehow. But beats me on how to do it.
W-S
It was really quite interesting to setup. The ones we made turned out so-so. The problem was the only room that we had to create the holograms in was on the 2nd floor of the house. So all kinds of vibrations from below caused some problems.
If ur going 2 do this urself, I'd advise setting up the project in a school's darkroom or janitor's closet with a cement floor.
Make sure ur far away from streets and all forms of noise (and therefore vibrations) as this REALLY causes problems.
FLXkid (the Visual Dataflex Guru)
...
Better VDF than VD!
Better VDF than VD...check it out: Data Access
The laser pointer they used has a 650 nm laser...hmmm.
Wonder what a hologram of a DVD would look like, given that 4.7 GB DVD-R discs use 650 nm lasers in the recording process?
"Evil will always triumph because good is dumb." -- Dark Helmet
This is been done for years now. A couple of links. Check the dates. http://www.3dimagery.com/pointer.html http://www.holoworld.com/holo/diode.html Tim Massey Don't say I never gave you anything
Linux IT Consulting and Domino Development in Michigan
I actually went to a little seminar one day at the MIT Media Lab where we did this. It was really cool. You can make much more impressive holograms with the right equipment, but the fact that you can do it with a laser pointer and not this expensive monster of a laser is really neat
of who can link the most websites about holograms...cause i just won!
The holoshop
another page
yahoo group on holography
the big holobook
how to shoot holograms
holoworld
silver holographic
holophile
the last one but a good one
Man: Is your uh, is your wife interested in....holography, ay? 'Holographs, ay', he asked him knowingly?
Squire: Holography?
Man: Snap snap, grin grin, wink wink, nudge nudge, say no more?
Squire: Laser pointer diodes, eh?
Man: They could be, they could be taken with diodes. Candid, you know, CANDID holography?
Squire: No, no I'm afraid we don't have a laser pointer.
I watched C-beams glitter in the dark near the Tannhauser gate.
The only catch is that these holograms are only visible at a very narrow range of angles. Not just the two angles of rotation to your eye, but also the two angles of rotation to the point light source. So it can take a bit of fiddling before you suddenly see something. But when you do, it's very sharp and detailed.
Slashdot monitor for your Mozilla sidebar or Active Desktop.
Those laser pointers you can get with with switchable tips that cause the device to project different 2D images (by multi-slit-diffraction, I suspect) can be fun. One time I was in a hotel up on the tenth floor and I had just bought one of these toys.
... fun!
[Side note: yes, I know this is somewhat off topic, but this thing I'm about to tell you could have amplified effect with 3D projections.]
I stuck on the tip which projected a 'UFO' image, stepped out onto the balcony and shone it onto the ground. I moved it around and after a few seconds I heard some little girl scream "MOMMY!" so then turned it off. Imagine what you could do with one of these things projecting the right 3D image
My father was playing with holograms with a home made HeNe laser about 20 years ago I think.
At the time I didn't understand much of the process but I remember he had to borrow a street level place in a low traffic area and had to place the working plane on a stack of strange things such as buckets of sand and tires' inner tubes.
Doesn't sound too professional but might still work.
baubau
That I can finally custom-make my holo-friend? I've always wanted a friend, but hologram technology hasn't caught up with my needs. Geeks have needs, too!!!
Im bit confused on those two:
holograph - the 3d image on credit card
hologram - projected 3d image in space
Did i get it right, or is it the other way around?
I'd probably be the smart ass that would creat a hologram of the windows 2000 cd.
(you know, the one with the hologram on it?)
Would that be like putting mirror in front of a mirror?
Anywho, off to bed....
.
Have you read the moderator guidelines? Well, have you, PUNK? (and I want a Karma: Gnarly option)
HA! I'd like to see them extract royalties while I exercise my cat on Sealand!
...Yet another thing those annoying teenagers can do with this annoying pointers at the movie theaters...
When will those guys STOP?!?!
Get a used HeNe laser off ebay or any Optics surplus, with TEM00 properties (which means the laser is coherent... needed for holography, and you'll be able to make some holograms that have more than a few millimeters of coherence (hense, depth).
:), yeah sometimes it's that crazy, I tried :) ).
Laser Diodes holography really sucks, it's pricey for the result you get, learn the thing with the right basic parts. If you're ready to invest let's say 400$ worth of chemicals films and all, with the idea of doing more in the future, might as well invest in the proper "amateur equipment"
Also: High power laser diodes in a decent spectrum (630-640nm) aren't THAT powerful, or if they are, (more than 5mw) they are pricey. These laser diodes lacks coherence (notice how close are the object from the plates). Without coherence, you don't get depth, without power, you have more chances that your object might move (if the object moves just a quarter of the wavelength, it screws up the hologram), so getting a cheap used 20mW HeNe laser gives you the benifit of power (you won't make a 8x10 with that, unless you have a really stable environment that can take 30+seconds exposure time depending on the object, of course doing the hologram of a fruit might not work too well with that much exposure because only the "fermentation" of the fruit over 30 seconds changes the structure in the nm scale
The only downside of Gas lasers is their lifespan. You can be lucky and it would last for 3-4 years, like you can get one that will last for 6 months, depends on the manufacturer, prices, condition. Normally they give you the tube usage and lifespan. Also, it requires high voltage power supply, which isn't a problem for the low power heNe lasers (under 30mw at the output).
Holography is cool, but it takes patience, a lot of trial/error, and when you want to move a step further, it takes as much money than doing high-end photography (with all the optics and chemicals).
--- Metamoderating abusive downgraders since my 300th post.
When I was a kid (or was that a teenager?) I used to draw (simple) 3D images with red and blue pencils and then view them thru those silly red-and-blue 3D movie glasses.
It is easier than the arc-scratch technique, but requires the funny specticles. Trade-offs trade-offs. But, red-and-blue gives more instant gratification.
My fav was the Dolly Parton sketch.
Hey! Can I patent a new way to hide porm from the mom? Beats one-click shopping.
Table-ized A.I.
(in other words it got too damned big.)
Something Hemos will never say about CmdrTaco's unit.
www.photologie.net has a geat walkthrough for laser pointer holograms with lots of pictures.
It covers adding more power to the pointer as well and some details for opening the caseing without damageing it.
Bust out your Dremel tool and potentiometer, and use the fish cuz its in French.
Yeah I agree. He was one of the good guys. It was tragic, he left us with alot of great music. Hail Victory Ian!
In a similar vein, I've spent the past week or two trying to develop a way to produce seamless, stereoscopic 3D desktop backgrounds. I've always had an interest in stereography, but until now I couldn't find a way to apply it to my PROPAGANDA tiles..
Just yesterday morning I finally managed to produce (and can reproduce at will) stereoscopic 3D wallpaper in Gimp. No rendering, no photography, nuthin but pure hand-made goodness in Gimp.
Cheers,
Bowie J. Poag
it doesn't matter anyways, since most of the things that get posted on /. are mostly crap.
and for the record, the moderators suck.
If you built yourself 2 nitrogen lasers (produce UVA light) and you pumped high voltage electricity into them, you will have an electric beam that will shoot a few hundred yards.
It works because the intense UV light from the laser ionizes the oxygen in the air. Ionized air is more conductive of electricity. The high voltage electricity shoots down the path of the laser beams.
You have to have two laser beams to have a complete circuit. If you shot this at a deer or somthing, the electricity would travel down one beam, pass through the deer's central nervous system, and pass back out on the other beam.
BTW, you could set it from "stun" to "kill"
Also there is quite a few people who build nitrogen lasers. Its not hard.
If you don't understand any of my sayings, come to me in private and I shall take you in my German mouth.
now you can not only make a copy of the latest version of microsoft windows on a cdr, but you can use your warez versions of photoshop and pagemaker to print boxes and labels and make a nice little microsoft hologram logo for them to complete the look. neato, hehehe. =)
laser painted holloman
It's psychosomatic. You need a lobotomy. I'll get a saw.