[Laser] Makeup mirrors at AS&S

[laser@mailman.qth.net]

I might be late on this, but if the focus is on a clear marble, the light
exiting the marble will be essentially in one spot.  Smaller area of the
receiving diode, therefore faster rate.

Tom Upton  AD6N

W2MXW wrote:

> Hi fellow laserists, just one of my periodic "heads-up" posts when I find a
> good deal somewhere that I feel would benefit us all. As always, I have no
> affiliation whatsoever with the company mentioned herein, I am just a
> satisfied customer.
> This time it's 6-5/8" diam. concave makeup mirrors from American Science and
> Surplus (www.sciplus.com) cat. no. 34335, $3.50 for a pack of 2. The focal
> length based on a quickie check (not very scientific :-) appears to be about
> 20". Perfect for making a 'scope for use as an optical antenna when you
> don't want to risk your expensive astro job, and no more 'borrowing' the
> YL/XYL's mirror for 'experiments'! Image formation is quite decent, but of
> course we are not concerned with this for communications purposes. No doubt
> it would still have too much distortion for astro use, but for 'lasering'
> it's more than adequate.
> Mount one of these puppies in a black ABS pipe, pop a large-area PD like the
> All Elec. ones in front (or make a diagonal and shoot from the side) feeding
> a K3PGP frontend and you're good to go...
>
> 73 es happy lasering de Jon W2MXW
>
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