Re: LIDAR strength?

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <Pine.SOL.3.91.980917211829.13643I-100000@apollo> "Graydon D. Stuckey" writes:

> > If only a small source is needed, why not use superbright IR LED's ?
>
> I am not an optical major, but my understanding of this is that the light
> that is shed by a typical halogen light bulb has a small amount of the
> frequency at which lidar operates.  That frequency is very high, such that
> we can't see it with the naked eye.  Since halogen bulbs are designed to
> produce light in the visible spectrum, they are not incredibly efficient
> at producing LIDAR freq light.

a) Infrared has _LOWER_ frequencies than visible light.

b) Go far enough, and infrared becomes radiant heat.  Since halogens
   produce a _LOT_ of heat, I'll bet they produce a lot of IR too.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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