Subject:
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RE: !!! Laser attachments for Mindstorms !!!
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Newsgroups:
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lugnet.robotics
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Date:
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Wed, 27 Oct 1999 20:39:12 GMT
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Viewed:
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776 times
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If you remove the lens from (I suspect) most pointers, you won't get a beam
of light at all, even a conical one. Most laser diodes are essentially
"point" sources, the light goes in any direction it can (think flat
lightbulb). Moving the lens closer to the diode will create a conical
beam, moving it away will begin to refocus the point source at some
distance from the lens.
Jeff
jeffrey.hazen@northmill.net
-----Original Message-----
From: Christopher Lannan [SMTP:shakguy@hotmail.com]
Sent: Wednesday, October 27, 1999 3:26 PM
To: lugnet.robotics@lugnet.com
Subject: Re: !!! Laser attachments for Mindstorms !!!
In lugnet.robotics, Kevin Loch writes:
> You can also take the "lens" out of the front of a good laser pointer
> and it does the same thing.
>
> KL
>
> In lugnet.robotics, Tobias Moller writes:
> > > enough at optics to elaborate on how the beam could be diffused into • more
> > of a
> > > cone shape?
> >
> > Well, some of the cheaper laser pointers do this automatic. The produce a
> > big spot of light when held not too far away from a wall.
> >
> > --Tobias
Why spend money on a laser, that should have a focused beam, when all
you're
going to do basically, is turn it into a flashlight?
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