UV Blocking clear material or coatings
UV Blocking clear material or coatings
(OP)
I am working on a medical application where I need to block wavelengths of light from 500 nm and lower. The photoinitiators in medical composites typically cure at 470 nm, so I can't have any of the blue and UV light. Most of the methacrylates (Lexan and the like) don't cut off until about 400 nm. Another option would be to use a film or coating on the Lexanish plate. The final size of the lens needs to be about 12" x 12". Does anybody know of a cost effective solution other then telling my customer I can't do it?





RE: UV Blocking clear material or coatings
He has been selling photo initiated resins since the 1990s
And can tell you what works and what does not.
B.E.
RE: UV Blocking clear material or coatings
Attached link shows optical properties of the Solvay sulphone medical polymers, which is a usefull document as a reference for this type of work.
Craig
RE: UV Blocking clear material or coatings
Methacrylate is acrylic, typical brand names Perspex, Oroglass, Plexiglass Shinkolite.
Sheet manufacturers may be able to supply UV filter grades. They may do this by adding UV absorbing pigments. Museum grade has UV filters, but I don't know if it filters in the range you specify. By museum grade, I mean the grade used to protect displays like old documents where they might otherwise be subject to UV degradation. Perspex certainly had one such grade in years gone by.
Regards
Pat
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RE: UV Blocking clear material or coatings
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: UV Blocking clear material or coatings
RE: UV Blocking clear material or coatings
http://www.evaporatedcoatings.com/
Harold
SW2009 SP4.0 OPW2009 SP2 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
www.lumenflow.com
RE: UV Blocking clear material or coatings
RE: UV Blocking clear material or coatings
A couple questions to answer might be how white does it need to be (degrees K) and how much blue is too much?
Harold
SW2009 SP4.0 OPW2009 SP2 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
www.lumenflow.com
RE: UV Blocking clear material or coatings
How much of a tinge will depend on how much you want to spend. A notch filter will be more expensive than a sheet of transparent yellow or orange acrylic (which will block below ~ 500 nm).