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/sci/ - Science & Math

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File: 2 KB, 335x88, pew pew lasers.png [View same] [iqdb] [saucenao] [google]
2226235 No.2226235 [Reply] [Original]

Hello /sci/, layman here. Is there a sort of laser or light beam that will become visible when it intersects another beam? Say in a grid fashion. Pic related.

>> No.2226286

Bump.

>> No.2226299

Nope. If it was, we would have had holograms years ago!

>> No.2226333

>>2226299

So... what about creating one? What would be the criteria here?

and before you tell me it's impossible, this is science we're talking about.

>> No.2226385

>>2226235s there a sort of laser or light beam that will become visible when it intersects another beam?

I don't see why you couldn't have light that refracts off other coherent light in order to project a 3d image in one direction. You'd need a pair of lasers that could be aimed 60x a second for each pixel though.

>> No.2226406

light doesn't interact with other light. How hard is it to make atmospheric nitrogen fluoresce or lase?

>> No.2226470

>>2226406

Well, my idea was to make visible objects, such as steering wheels, to guide your hands while using a Kinect-like arcade machine. Maybe it would just be more efficient to make HUD goggles.

>> No.2226479

>>2226385
This is actually "really easy" with a MEMS mirror.

>> No.2226512
File: 53 KB, 640x640, 1292500888691.jpg [View same] [iqdb] [saucenao] [google]
2226512

in short:
no, because of interference

>> No.2226553

>>2226479

Explain please.

>> No.2226599

If you aim enough lasers at one point, and at power levels enough to make that one point visible (surely the atmospheric gases give off some light if heated?), you could make some holograms.

>> No.2226623

>>2226599

>fire

Good idea!

>> No.2226681
File: 147 KB, 325x324, sad-bored.png [View same] [iqdb] [saucenao] [google]
2226681

>>2226623
not at all..
- too much energy wasted
- could project only on one plane visible only from below (heated molecules rush upward distorting the image above)
- fire hazard
- blindness hazard (refraction)

>> No.2226722

>>2226681

You should try thinking more like a scientist and less like a pessimist.

The distortions might be accouted for. Don't really know how, but I'm guessing somewhat the sameway lasers are used to measure atmospheric movements and make telescopes give sharper images.

Maybe the lasers' wavelength or some other property (I'm not a physicist) could be made so that it wouldn't get past a glass wall between hologram and humans. (Fire and blindness)

And who the hell gives a shit about energy? Holograms! (And you could have motorized mirrors to conserve lasers' energy).

>> No.2226739

>>2226599
this has already been done. but it creates plasma dots, reeks of ozone and has to be done under a bell to avoid people toucing it/too much ozone escaping.

>> No.2226745

Other things come to mind as well:

Would it still be a hologram, if it was inside a glass cube? That would prevent "fire" and "heated molecules" problems. There could be glowing stuff inside the cube that requires a certain power to be active - more than one laser but low enough to conserve energy to make hippies and greenpeace happy and to prevent eye damage too.

>> No.2226758

>>2226722
>You should try thinking more like a scientist and less like a pessimist.

the word you search so desperately for is engrfag.

>And who the hell gives a shit about energy?
you shut your layman-whore mouth. grownups are talking.

>> No.2226759
File: 26 KB, 500x451, fig3.jpg [View same] [iqdb] [saucenao] [google]
2226759

>>2226739
sauce: http://www.aist.go.jp/aist_e/latest_research/2006/20060210/20060210.html

>> No.2226854

>>2226758
I can tell by the adult language.

>> No.2226879

>>2226759
sounds like a massive vision hazard
blindness everywhere