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06/05/2005 12:13:35 PM · #1 |
Ok so one day in school im really really bored and i open up a floppy disk. Not like i havent done it before so i play around with the round black disk for a while. Then after some time i hold it very close to my eye and look out the window. And it seems like magic happend. The disk is only letting the IR light rays through.
Ha ha ok enough of the story hope all of you reading this got the point. If you have a lense small enough that u can put a disk from inside a floppy disc in front of it then you can use it as an IR filter.
hope someone enjoys taking some IR pics. I have one in my blog just click the link in my sig if you wanna see it.
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06/05/2005 12:19:08 PM · #2 |
Lucas, your blog gives away your challenge entry which is supposed to be anonymous. You might want to either edit your blog, or put the infrared image in your profile here.
Message edited by author 2005-06-05 12:19:28. |
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06/05/2005 12:22:14 PM · #3 |
oops lol thanks for the tip
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06/05/2005 12:44:44 PM · #4 |
Lucas, infrared light is, by definition, not visible to the human eye. Your floppy disk acts as a deep red filter but appears to fall short of being an IR filter. The red image on your website blog is very red but does not appear to be an IR image. IR light begins at wavelengths of about 720 nanometers and extends to several thousand nanometers. The human eye can percieve wavelengths from about 400 nanometers to 700 nanometers with a peak response around 555 nanometers. It is possible that your floppy disk filter passes more IR than visible wavelengths but the image does not reflect that. Try stacking several layers together and see if it becomes a more effective IR filter. I suspect that the redness of the image is due to the iron oxide content of the coating on the floppy disk. All that said, it was very inventive of you to try this novel filter method!
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06/05/2005 12:50:29 PM · #5 |
Uhm....ok. well i thought about that before but it never really stayed in my mind. anyways thanks for clearing that up.
so to everyone else. the ir filter is actualy a really deep red filter. still gets you some nice images. best use in light and open spaces.
So the sum up everything the ElGordo said the redness is probably due to the iron oxide content of the coating on the floppy disk.
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06/11/2005 12:43:45 PM · #6 |
One thing you could do, is to take out some old film negatives
and cut away the part in the beginning, that got fully exposed
when the film was inserted to the camera.
Put as many layers of the fully exposed negatives, as it takes
for you not to see anything through it. Tape the whole thing
in front of your camera and check if it works. Most cameras
have a pretty good Anti-IR filter (?) built in, so you will
have to open up the camera and remove it (Wouldn't suggest though)
You need to have a very small lense in order to fit the negatives
properly
EDIT: //www.deviantart.com/view/19247790/ <- Photograph taken, using the above mentioned contraption
Message edited by author 2005-06-11 12:44:34. |
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