The cement used to fix the UV filter glass discs to the front of dichroic lamps etc, so high temperatures. It is clear , maybe a silicone type material.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
"N_Cook" wrote in news:ghufa7$t64$ snipped-for-privacy@news.motzarella.org:
Probably a UV-curing cyanoacrylate,or it could be an optical epoxy. Edmund Scientific (edsci.com) has UV curing optical glues.(not cheap)
-- Jim Yanik jyanik at kua.net
dichroic
I think you're right. I'd forgotten about waterglass. Once you make a purchase under the lamp cover disc it comes away fairly easily. I did not realise that waterglass can tolerate such high temperatures - even a major non-sand component of foundry casting sand even. I'd forgotten I used it a long time ago to stick a glass patch over a bullet hole in a sheet of window glass, otherwise I've just used for disguising scratches on 'scope CRT screens. Incidently there must be some medical use for it as I got a pint of it from a dispensing chemist.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
Isn't waterglass brittle and corrosive (etching the glass as it adheres)? I think a flexible high temperature adhesive like RTV silicone is a better prospect, and more likely.
Dichroic reflectors and UV or 'heat absorbing' glass are typically used on projector lamps which get quite hot, the thermal cycling would fracture a hard adhesive.
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