Search the CONFOCAL archive at
http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal

Dear Shalin,

what about two filter wheels with six positions in a row? Leave one 
position empty, and then you have your 10 positions.

The bandpass filters can be custom-made by Chroma, but that's probably 
not cheap.

cheers,
Michael


Shalin Mehta wrote:
> Search the CONFOCAL archive at 
> http://listserv.acsu.buffalo.edu/cgi-bin/wa?S1=confocal Dear all,
> 
>  A labmate of mine is contemplating bandpass filter-set (25nm FWHM with 
> center wavelengths of 450 to 675nm at intervals of 25 nm) for doing 
> spectral unmixing.
> 
> To go with the filters he is looking for 10 position motorized wheel. 
> Preferably the filters (and wheel adapters) should have 1" diameter, but 
> smaller diameter is also usable. CVI does provide bandpass filters with 
> 25nm FWHM but only at 50nm intervals (whereas we need 25nm interval). We 
> are yet to hear about custom filters for in-between center wavelengths.
> 
> Are there any other off-the-shelf high transmission filter sets 
> available from other vendors with said bandwidths?
> 
> For filter wheel, we got a quote from Ludl for 10 positions wheel of 
> around 5.5K USD. Thorlabs is selling 6 position filter wheel at approx. 
> 1K USD. But unfortunately they do not have 10 position wheels. Ludl 
> filter wheels are switchable in 50ns whereas thorlabs' in 300ms. But he 
> doesn't need real high speeds. Any other vendors of 10 position wheels 
> that cost say, 1.5K?
> 
> Thanks for your suggestions.
> Commercial responses are welcome off the list.
> 
> Regards,
> Shalin
> 
> 
> 
> -- 
> My co-ordinates:
> Shalin Mehta, Graduate student
> Graduate Programme in Bioengineering, NUS, Singapore
> Mobile: +65 90694182