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Do I smell 20W IR 18650 handhelds?






Toke

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Uranium said:
5000mw 808nm laser diode with fast Axis Lens - eBay (item 130416138097 end time Aug-30-10 08:18:47 PDT)
Click to expand...


The price ensures that only people who have thought carefully about it will have one. A good thing.


http://cgi.ebay.com/New-150W-co2-laser-tube-water-cool-power-supply-/130417546927?pt=LH_DefaultDomain_0
I wonder if this could be made portable? :D
(At 2m it is a bit bulky, the combination of operating voltage and water cooling makes it a bit risky to carry around.)
 
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xStatiCa

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Also important with these batteries is they are much safer than lithium ion and lithium polymer and can be charged in 15 minutes to 100% (which is accurate). I have a friend using much bigger A123 cells with 60 sized RC helicopters. They are lower voltage and lower capacity ( 70% the energy density of Li-Polys) but the safety is worth it especially considering they can be charged quickly. They will not explode on you if you or your charger accidentally overcharge them.
 
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AJ_Dual

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Toke said:
Here is one, a bit bulky and I do not know how to focus it, but mangable as handheld. :D
NEW COHERENT 20W HIGH POWER LASER DIODE BAR 808nm DPSS - eBay (item 110571368434 end time Aug-17-10 12:15:11 PDT)
Click to expand...

A half cylindrical converging lens on the horizontal plane (plano convex) would be where you'd start.

Thorlabs.com - Cylindrical Lenses

Another idea would be to use a flat bundle of fiber optics along the axis of the emitters, then re-bundled to output in a (pseudo) circular beam.
 
Toke

Toke

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AJ_Dual said:
A half cylindrical converging lens on the horizontal plane (plano convex) would be where you'd start.

Thorlabs.com - Cylindrical Lenses

Another idea would be to use a flat bundle of fiber optics along the axis of the emitters, then re-bundled to output in a (pseudo) circular beam.
Click to expand...

That is one option, another would be to get the "fibre coupled" version.
They exist for industrial use*, with a length of fibre cable bolted on with a shape as you describe. It appears that the beam diverge strongly at the end of the fibre bundle, and would need corrective optics.

The blocks are available on ebay, the fibres should be too.

*http://www.oclaro.com/product_pages/ProLite_reg__BW_Series.html
 
Prototype

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I suddenly feel foolish. Not a month ago I was reading some information on the company who acquired Big Sky lasers that had bars just like the ones you mention :oops:
 
AJ_Dual

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Prototype said:
This is the stupidest thing I've read in a long time. There is NO reason for a 20W handheld laser, especially an invisible one.


@Toke and hugo999999, diode bars come in up to 60W I believe, and then there are the diode stacks and the bars run quasi-cw for even more power. It wouldn't be much of a handheld anyways because of the way they need to be mounted and the cooling required.
Click to expand...

Yes there is, it's called the APPLE. :D

Anti
Personnel
Portable
Laser
Emitter

Apologies/credits to author Greg Bear, and a one-finger salute to Steve Jobs.
 
Toke

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It looks like there are a lot more bars on ebay than there are fibre assemblies for them.
And the fibres there are are expensive.

My world domination death ray in a shoulder bag will have to wait a while.
 
AUTO XX

AUTO XX

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You must always remember to use your physics powers for good instead of evil young one - My grade 11 physics teacher to me after electrocuting a classmate with a self built backpack security device.
^_^
 
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