Re: Beamed propulsion doable now, and with it space solar power.

What are " ultra-high intensity micro-scale LED's", who makes them

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LM
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Crackpot Optoelectronics.

Cheers

Phil Hobbs

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Dr Philip C D Hobbs 
Principal Consultant 
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Reply to
Phil Hobbs

I take it you know about this because you are one of the experts in the field?

Rick C.

Reply to
gnuarm.deletethisbit

Doesn't that collimator violate some basic principle?

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John Larkin         Highland Technology, Inc 

lunatic fringe electronics
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Reply to
John Larkin

That article on beam power was a complete crock. His magic collimator violates the second law of thermodynamics, he assumes that a LED plus a lens makes an efficient light source (it doesn't), and you'd never be able to cool an array with that power density.

For openers.

Cheers

Phil Hobbs

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Dr Philip C D Hobbs 
Principal Consultant 
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Reply to
Phil Hobbs

If you read the article it was flux density of 300W/cm^2 but on a die that was just 20um across with a whopping 1mW of output power.

Some of the latest high efficiency LEDs are approaching the surface luminosity of the sun's photosphere but that is still nothing like enough to levitate a feather even at point blank range.

It might be enough to power a Crooke radiometer on a good day.

Oh I don't know - an infinite heatsink ought to do it. They are not called infiniLED for nothing.

It is amazing how so many of these crank proposals violate the second law of thermodynamics - likewise with perpetual motion machines.

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Regards, 
Martin Brown
Reply to
Martin Brown

But he was talking about a vast array of them, closely spaced, with a fly's eye collimator.

Cheers

Phil Hobbs

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Dr Philip C D Hobbs 
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Reply to
Phil Hobbs

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