# Are holographic lenses practical?

**URL:** <https://boards.straightdope.com/t/are-holographic-lenses-practical/814744>\
**Category:** Factual Questions\
**Created:** [May 24, 2018, 6:26pm UTC](https://boards.straightdope.com/t/are-holographic-lenses-practical/814744 "2018-05-24T18:26:13Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Darren\_Garrison](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/darren_garrison/32/92_2.png) [@Darren\_Garrison](https://boards.straightdope.com/u/Darren_Garrison)\
**Post date:** [May 25, 2018, 11:06am UTC](https://boards.straightdope.com/t/are-holographic-lenses-practical/814744/10 "2018-05-25T11:06:02Z")

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> [@eschereal](#):
>
> Sorry, I guess I am not aware of that kind of imaging, unless it involves reflective dust or somesuch.

I remember seeing some of these at a hologram gallery/store in Gatlinburg, Tennessee, some time before 1992 [when the whole block burned down](https://en.wikipedia.org/wiki/Gatlinburg,_Tennessee#Fire_of_1992). Lots of expensive\* holograms on display, but the ones that impressed me enough to still remember more than 20 years later were the [microscope](https://www.youtube.com/watch?v=jhPDeUtn8mc) and [telescope](https://www.youtube.com/watch?v=hPqdCO23PRI) that you could look into. (The microscope one in the link might be the same one I saw–I’m pretty sure that the telescope one is the exact one.)

\*The cheapest ones were IIRC over $50 and the most expensive several hundred, not in my high school budget at the time.

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