Subject: Slit Glass Transmisson - Microscope Slides

From: Steve Knapp

Submitted: Thu, 25 Jul 1996 15:24:59 -0600

Message number: 24 (previous: 23, next: 25 up: Index)

I called the manufacturer of our microscope slides to follow-up 
on Jim's comment.  Paul Sanford of Erie Scientific (who purchased 
the 'Gold Seal' line from Becton Dickinson Labware), at 
(800) 258-0834, is an expert at the transmission of their glass.
The glass is soda-lime silicate (common window glass), except that 
it has "reduced iron" (not quantified).  For 1mm slides of the 
type I am aluminizing, the normal incidence transmission is 
characterized as follows:

wavelength (nm)     % transmission (normal incidence)
345                 .90

320                 .786
310                 .655
300                 .453
290                 .232
280                 .0773

Paul Sanford said that there were no mass producers of 
microscope slides out of borosilicate glass, but this 
is unverified as of today.  I hope this information is useful 
toward understanding the consequences of the glass I am
currently using.

-Steve Knapp 

jeg@astro.Princeton.EDU wrote:
> 
> Most microscope slides these days are borosilicate glass, which is
> quite transparent to 3000, (much more so than DIS is), so check
> what you have; it may be OK.
> 
> jim
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