>I have found Chroma Technology to be very helpful in designing
>and producing special filters/optics. 800/824-7662 (Vermont).
We've had very good custom-specified filters made by Chroma too. The only
problem was that it took them usually some 6-8 weeks longer than
originally stated to produce them.
Beat Ludin
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Dr. Beat Ludin, FMI, PO Box 2543, 4002 Basel, Switzerland
Tel. +41 61 697 6697 / FAX +41 61 697 3976
Internet:[log in to unmask] / Compuserve:100102,1527