[Laser] Laser Digest, Vol 66, Issue 8

[Garnier Yves]

Not worry Tim !
From the confusion is born the revolution :-)
The brainstorming bring lot of powerfull thoughts.
You are right it is very important to store all this treasures trove of optical stuff for practically free :-))
I try to find some various half-cynlindrical lenses to built a laser diode barre collimator.
The laser diodes barre and the stacked laser diodes barre are very difficult to concentrate in a correct well delimited focal point in front of a beam expander entry. 
Cheers
Yves F1AVY
http://f1avyopto.wifeo.com

--- En date de : Dim 21.3.10, Tim Toast <toasty256 at yahoo.com> a écrit :

> De: Tim Toast <toasty256 at yahoo.com>
> Objet: Re: [Laser] Laser Digest, Vol 66, Issue 8
> À: laser at mailman.qth.net
> Date: Dimanche 21 mars 2010, 18h40
> OK, well it's my fault for starting
> an uproar about proper use of fresnels and LEDs/lasers, and
> it wasnt really the point i meant to make a few days ago,
> lol. So i'll back off and go read about how 1/bw=coherence
> :-)
> The rest of my main point from the other day:
> There are cheap high quality optics inside the old VHS and
> other camcorders that are becoming more available now that
> solid state type cameras have come on the market. If youre
> willing to take one apart to get at them and dont mind going
> through trash sometimes to find stuff. Focusing mechanisms,
> negative and positive lenses with an assortment of focal
> lengths, most have coatings or anti-reflection coated, the
> big objective lenses of course - sometimes up to 2 inches
> diameter, first surface mirrors, varius filters and
> mechanical parts etc.. a treasure trove of optical stuff for
> practically free. 
> 
> 
>       
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