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"Scratch" a Hologram (IYPT)

Postby brandonchen32 » Sun Feb 16, 2014 6:50 am

I'm working on a hologram topic in a high school physics debate tournament, and we have problem finding out how it works and which kind of plastic is most suitable to "scratch" a hologram. We already have read some reference and have the tools to scratch. However, most of the holograms we found were another kind which is not I am researching on. Can someone give a specific answer or any website which is easy to comprehend. Thank you very much!

If you need some basic information you can go to this website:
however, the information is not enough for us.

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Re: "Scratch" a Hologram (IYPT)

Postby tdaly » Fri Feb 21, 2014 11:28 am

Hello brandonchen32,

I suggest doing an experiment with several types of plastic to see which material produces the clearest abrasion hologram. For further discussion of the science that underlies scratch holography, I did a Google search for "specular holography theory", which returned numerous results. A nice paper was published in Applied Optics in 2011. The article is "Specular holography" by Matthew Brand. ... 50-25-5042

I'm on my university's network so I can access the full text; I'm not sure if you will be able to access it directly. If not, you may visit a local college or university and see if you can access the article that way.
All the best,

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