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Thread: Combining The blue´s :*

  1. #1
    Join Date
    Jun 2008
    Location
    Stockholm, sweden
    Posts
    352

    Default Combining The blue´s :*

    Hello ppl.

    Big Aluminium plate arrived today so finally i can start aligning the first 4x405nm diodes. (out of 24)

    I bought some nice Cooling Wings from " www.Elfa.se " to work as cooling.

    Anyway i have emailed edmund optics for the Achromatic lenses to tighthen and (combine) the beams, and i got the answer that they wouldent suggest achromatic lenses as the Wavelength is near UV. And suggested me to use "Fused Silica lenses", and also he wrote:

    -"To recommend a specific part though, I would need diameters and focal lengths."

    What excactly does he mean? the diameter of the diode? focal lengths?

    Somebody?

    Also he suggested to use this type of Beamsplitting cube:
    http://www.edmundoptics.com/onlineca...1&itemid=20274

    i trust him but just wondering if anybody know of a better price somewhere? Although i know Edmunds have good quality i might aswell go with em.?

    Thnx for any answers.

    Take care ppl and have a great weekend.

    /Rickard

  2. #2
    Join Date
    Oct 2006
    Location
    Cleveland, Ohio
    Posts
    2,334

    Default

    What he's asking for is the desired lens diameter and its focal length.

    Because you are combining beams, you do want to use a poarizing beam splitter cube, not a non-polarizing one.

    Achromats and Apochromats i think are only necessary when you are trying to focus multiple wavelengths through them, because they are color corrected to have the same focal length for a range of wavelengths. Since you are passing monochromatic light, it doesn't matter as long as the spherical aberration is corrected near your wavelength.

  3. #3
    Join Date
    Jun 2008
    Location
    Stockholm, sweden
    Posts
    352

    Default

    ok so u dont suggest me to use the achromats but the "Fused Silica lenses" as he sayd?

    Ok, about the beamsplitters you suggest me to use a Polaraizing Beamsplitter cube, opposite from what the guy sayd?

    If thats the case would this item be the one im looking for?

    http://www.edmundoptics.com/onlineca...productID=2037 (50mm at the bottom)

    or is it this?
    http://www.edmundoptics.com/onlineca...productID=2295 (35mm at the bottom)


    thank you.

    /Rickard

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