[ATM] Make A Barlowed Laser Collimator?

[RodShea]

Thanks,

Hey, I thought I was doing well to think that "With one wavelength, why do I 
need a Barlow?  Wouldn't a simple lens do as well?"  <G>  I guess I left it 
in since the thought started with a Barlow.  Still, I appreciate the 
response, since I know zip about optical theory.

Thanks,

Rod


----- Original Message ----- 
From: "Richard" <cnc at cncservo.co.uk>
To: "RodShea" <atm at atmlist.net>
Sent: Sunday, April 01, 2007 5:05 AM
Subject: Re: [ATM] Make A Barlowed Laser Collimator?


> Hi RodShea,
>
> Sunday, April 1, 2007, 12:38:00 AM, you wrote:
>
> R> I have a red 635 nm laser...
>
> R> lens or negative achromatic doublet..
>
> Regardless of anything else Rod, you don't need an Achromat on a
> Monochromatic light source. Go on, kick yourself :)
>
> -- 
>
> Best regards,
>  Richard in the UK
>
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