[Laser] Re : 5mw laser tranceiver kit (resent because mailing error) Chris L

[Chris L]

If you igonore the physics you can expect criticism.

Chris VK3AML.

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> Date: Thu, 23 Sep 2010 17:52:25 -0700
> From: toasty256 at yahoo.com
> To: laser at mailman.qth.net
> Subject: [Laser] Re : 5mw laser tranceiver kit (resent because mailing	error) Chris L
> 
> Chris,
> 
> I'm not sure where youre getting some of this... That large mirror that Yves has (the 22cm) is not a LIDAR optic. In other words it is not a precision 1/4 wave optic costing thousands, it is in fact a bathroom vanity mirror. Also known as a cosmetic mirror, the kind women use when putting on makeup - sometimes called a makeup mirror. I think it is made of a think plastic. It is similar to the one i have except mine is about 30cn. I got mine from an old advertizing display at no cost. If you were to go out and buy one it might cost $10 or so. 
> You go on to say, "why would anyone even consider this when they could buy a fresnel" So you hate mirrors now too? and lasers? Give us a fricken break. 
> 
> Another thing, Yves is not suggesting the use of high powered lasers in a kit. Also a 5mw laser diode is pretty much eye-safe without any extra optics. Spread out even a little bit it becomes harmless. (unless you wish to stare into it) The most powerfull LED we would be interested in is in the 100ma class. I was going to ask you which one you would reccomend but i see you already have. Thanks for that. 
> 
> And happy (practical) kit building to you as well
> 
> tim toast
> 
> 
> 
> 
> 
>       
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