Re: sealing glue on dipping objective chipped off

Posted by Gabriel Lapointe-4 on
URL: http://confocal-microscopy-list.275.s1.nabble.com/sealing-glue-on-dipping-objective-chipped-off-tp7580641p7580643.html

*****
To join, leave or search the confocal microscopy listserv, go to:
http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
*****

Hi Micheal,
I don't have that objective, is the seal flexible or hard. If it has some
flexibility or it feels rubbery I would go with a high quality bathroom or
even better fish tank silicone. If it's hard I would go with epoxy. In any
case, since i't far away from the lens I would try to do the repair myself
to save so money.

One note though, I don't know if there is a gap between the two part that
need sealing. You might need to be careful to make sure any sealant you use
doesn't get inside. Personally, I would flip the objective nose down as
soon as the surface of the sealant stops being liquid. Epoxy solidify
through a chemical reaction so in theory it's going to harden evenly.
However, silicone harden outside-in, so the centre can stay liquid for
quite some time after it looks solid. In this situation I would be afraid
that some of it find it's way inside the lens tube.


Good luck,

*Gabriel Lapointe, M.Sc.*
Lab Manager / Microscopy Specialist
Concordia University, Biology Department
7141 Sherbrooke St. West SP 534
Montréal QC H4B 1R6 Canada
Lab : [phone] x5988
Office : [phone] x3008
Fax : [phone]
Cell : [phone]
[hidden email]
cmac.concordia.ca
http://gabriellapointe.ca


2013/7/8 Cammer, Michael <[hidden email]>

> *****
> To join, leave or search the confocal microscopy listserv, go to:
> http://lists.umn.edu/cgi-bin/wa?A0=confocalmicroscopy
> *****
>
> Leica added a sealing ring of glue to their 40X N.A. 0.80 water dipping
> objective and some of it has chipped off.
>
> Picture at http://www.flickr.com/photos/mcammer/9240581316/
>
> We were thinking of sealing it with layers of Krazy glue (after covering
> the lens element to protect from the vapor), high grade silicon caulk, or 5
> minute epoxy.
>
> Anyone have experience with this, or should we have Leica fix it (probably
> more expensive)?
>
> Thank you!!
>
> ________________________________________________________
> Michael Cammer, Assistant Research Scientist
> Microscopy Core, NYU Langone Medical Center & Skirball Institute of
> Biomolecular Medicine
> Cell: [phone]   Microscopy Lab: [phone]   Dustin Lab: (212)
> 263-3208
>