What do I use to expand an red Hene for a denisyuk hologram?

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Leek-leek5
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Joined: Thu Dec 05, 2019 5:19 am

What do I use to expand an red Hene for a denisyuk hologram?

Post by Leek-leek5 » Fri Dec 20, 2019 4:23 pm

Looking for a inexpensive way to turn the narrow beam in to a object beam.

@ 17:15 he says he's using a concave mirror. Can I pickup a concave mirror off eBay and do the same?
https://youtu.be/5IszBMYJ5Ks

Links to the iteams would be much appreciated!

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thycore
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Re: What do I use to expand an red Hene for a denisyuk hologram?

Post by thycore » Sun Dec 22, 2019 7:28 am

Take a microscope objective

Like this :

https://m.fr.aliexpress.com/item/326513 ... a08&is_c=Y

A x20 could be okay

BobH
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Joined: Tue Jan 06, 2015 10:26 pm
Location: Mesa, AZ

Re: What do I use to expand an red Hene for a denisyuk hologram?

Post by BobH » Tue Dec 24, 2019 10:06 am

Consider trying things you can find around the house for free. Find an old camera, bash it apart, and harvest some lenses from that. Try passing the light through areas on a wine glass stem. Be careful with the back reflections! Glass marbles? Glass door knobs? An old projection TV? Lots of things in everyday life now have lenses in them. Experiment, but always be careful about those back reflections.

Diffusers work too. Look for pieces of frosted glass. Go to a local glass shop and get some scraps for free or cheap.

BobH
Posts: 403
Joined: Tue Jan 06, 2015 10:26 pm
Location: Mesa, AZ

Re: What do I use to expand an red Hene for a denisyuk hologram?

Post by BobH » Tue Dec 24, 2019 10:18 am


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