RE: Re: New HIE Problem (Lines) and Re: (fwd) Re: Isn't IR LED a n oxymoron?

[Theo Benson <TBenson@xxxxxxxxxxxxx>]

Actually, I meant the first continuous operation, gas laser (as opposed to a
pumped ruby laser). The inventors had it running for almost half an hour
wondering why it wasn't working, until they glanced at an oscilloscope
monitoring its output, and realized it was lasing in the infrared!

> -----Original Message-----
> From:	Mr D.A. Munindradasa [SMTP:D.A.Munindradasa@xxxxxxxxxxxxxxx]
> Sent:	Monday, July 20, 1998 10:53 AM
> To:	'infrared@xxxxx'
> Subject:	RE: Re: New HIE Problem (Lines) and  Re: (fwd) Re: Isn't IR
> LED a n oxymoron?
> 
> 
> >So it shouldn't really pose so much of a quandry that some L.E.D. (Iight
> >emitting diodes) emit IR. By the way, fhe first LASER (Light
> Amplification
> >by the Stimulated Emission of Radiation) emitted infrared light! 
> 
> It was not real infrared instead just microwave radiation hence was
> labelled a MASER, though the possibility of LASER was predicted
> theoretically well before that. Indeed first true LASER was ruby. The
> spectral emission was in 'red'. 
>  
> >If you wish further confusion (and who doesn't?) consider this: pure
> >ultraviolet light isn't visible to us, either! But it is visible to
> >honeybees, butterflies, and other insects.
> 
> IR too is visible to some reptiles, specially vipers (hump-nosed-viper
> and green-pit-viper for example).
> 
> Surely IR and UV are not in 'visual' range of spectrum. Does that mean
> 'light' is a bit fussy term?
> 
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End of Infrared-Digest V0 #692
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