[OpenSPIM] About the cylindrical lens

[skf-ee at ipt.rwth-aachen.de]

Hi dear All,

I just have a problem:
Since more than 4 weeks ago I ordered the thorlabs parts for the OpenSPIM, the only one is
missing is the cylindrical lens (it was supposed to arrive like two weeks ago). I just
contact them and the problem is that they don't have in stock the ACY254-050-A; they 
would need to manufacture it and that would take a little long time.

So they propose to use the ACY254-075-A, the only difference of this lens is that the focal length is 75 mm
instead of 50 mm. I can see from the Open SPIM design that maybe would be possible to use this lens
if it is moved 25 mm closer to the first two achromatic doublets used to expand the beam in comparison
to the position of the 50 mm focal length lens. I am not an optics expert but maybe it can work.

Anothe solution I found out is to use the  LJ1695RM-A, a cylindrical plano-convex lens from Thorlabs with focal length 50 mm,
AR coating 400-750 nm but with the disadvantage that it is not Achromatic, http://www.thorlabs.de/thorproduct.cfm?partnumber=LJ1695RM-A. So if I will use only monochromatic illumination sources maybe is not a big deal to use this lens.

So, what do you think is the best solution? I would really appreciate if someone can give me her/his advice.

Kind regards.
Edgar Escobar Nieto
_________________________________________________________________________

Fraunhofer-Institut für Produktionstechnologie IPT 
Edgar Escobar Nieto 




Steinbachstraße 17 
52074 Aachen 

skf-ee at ipt.rwth-aachen.de 
http://www.ipt.fraunhofer.de
_________________________________________________________________________
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