Re: variable beam expander for 2P ~ 1-4x

Posted by Guy Cox-2 on
URL: http://confocal-microscopy-list.275.s1.nabble.com/variable-beam-expander-for-2P-1-4x-tp7367160p7368695.html

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Surely putting unnecessary amounts of glass in a 2P system is not a 'good thing'?

                                                           Guy

 
-----Original Message-----
From: Confocal Microscopy List [mailto:[hidden email]] On Behalf Of Mark Cannell
Sent: Tuesday, 13 March 2012 8:50 PM
To: [hidden email]
Subject: Re: variable beam expander for 2P ~ 1-4x

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If you _must_ have 1x, get a 2-10x and put in front of it a 2x reversed (i.e. 0.5x)?

Cheers


On 12/03/2012, at 11:04 PM, Dr Gregory Jefferis wrote:

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> Hello,
>
> We're looking for a variable beam expander for a multiphoton setup. We're currently using this 2-5x model from Thor:
>
> http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=3211
>
> and are trying to find a reasonably drop in replacement that starts a 1x and goes up to somewhere around 3x or 5x so that we can be more flexible about objectives.
>
> Would anyone happen to have a recommendation? This zoom range seems surprisingly hard to find. The best I have found so far is this motorised box from Thor
>
> http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=5626
>
> which looks nice but duplicates the power control already on the table and at almost £11K is >10x the price of a manual telescope which is our main requirement!
>
> Many thanks,
>
> Greg.
>
> --
> Gregory Jefferis, PhD                      
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