"N_Cook" wrote in Probably a UV-curing cyanoacrylate,or it could be an optical epoxy. Edmund Scientific ( has UV curing optical glues.(not cheap)
Read the full replyThe 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)
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.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required