We haven't tried them with confocal, but with video microscopy they work
fine.  They should work fine for confocal except, maybe, right at the
edges of the grid or lettering photoetching.
We used photoetched coverslips from Bellco (P.O. Box B, 340 Edrudo Road,
Vineland, NJ 08360  (609) 691-1075) to look at fields of live cells and
then, after fixing and staining, to locate the same cells.  Worked great
with video and, with phase contrast at high magnification, the etching
didn't interfere with decent images of the cells.  We never doubted they
would work with the confocal.   -Michael Cammer
 
On Tue, 15 Aug 1995, Alex Safonov wrote:
> Is it possible in principle to use gridded coverslips in the fluorescence
> mode, creating images of grids over the fluorescing specimen? We thought
> so (we have Eppendorf coverslips), but now can only get images in
> bright-field mode. We use BioRads 600 and 1000. Any tips?