At 19:23 8/26/99 +0200, you wrote:
>Dear Members,
>I would like to understand how filters work. How do you get a BP or a long
>pass filter for various wavelenght? What kind of material is used to make a
>filter?
>Thank you very much.
>David
---------------

There is a good article written by Jennifer Kramer (802) 254-2690 email:
<[log in to unmask]>) on "The right filter set gets the most out of a
microscope" Biophotonics, January/February issue.

or you can read the review article on "Computerized fluorescence
microscopic vision in the biomedical sciences" - A. Periasamy and B.
Herman, Journal of Computer-Assisted Microscope, Vol.6. No.1, 1994.


Ammasi Periasamy, Ph.D.
Director, W.M. Keck Center for Cellular Imaging
University of Virginia
Biology, Gilmer Hall (039)
Charlottesville, VA 22903
E-mail: [log in to unmask]
http://www.cci.virginia.edu/
Tel: (804) 243-7602; Lab.: (804) 982-4869; Fax: (804) 982-5210