Guide t o Handling & Cleaning Research Optics. Farshid Manoocheri. Handling Optics Hold an optic only by its edge. Never touch an optic with your bare hands Always use a clean, lint-free cloth, latex gloves or finger cots.
Hold an optic only by its edge
Never touch an optic with your bare hands
Always use a clean, lint-free cloth, latex gloves or finger cots
Never touch the surface of an optic, even with gloves or finger cots.
Oil films can coat particles, making them extremely difficult to remove.
Do not rely on odor as a guide
- Check exposure limits for any solvent you use
- Aceton is well detectedbelow exposure limit
- Some materials are detected well in excess of limit
Alcohols High Flammability, Low Reactivity
Chemicals leach materials out of surface
Fused silica glass is resistant to all
except to Hydrofluoric acid
BK7 glass can be damaged by climate, alkalin solutions
Some UV transmitting ”Black Glasses” are fogged by moisture in the air.
Do not leave these exposed to the atmosphere for long periods of time.
Finger prints etch into the optics if exposed to UV light long enough
Enclose your optics
Consider coating them with a protective coating.
Remove loose particulates by blowing or brushing
Drop one or two drops of the cleaning solvent directly on the optic
Drape a clean piece of lens tissue on the wetted surface
Drag the tissue across the surface gently
Repeat a few times steps 2-4 until optic is clean
Do not reuse solvent or lens tissues
2. Wait for the coating to cure about 15 minutes for smal optics or until entire surface looks cloudy.
3. Peel coating off with an adhesive backed lable. (White envelope lables work well)
Pour coating in the centre & use a bristle brush to evenly coat the surface
Remove large particles ( brucsh, dust bulb, dry clean nitrogen)
Use the Drag-Wipe method
Except for chrome, most bare metals are very soft.
Do not contact clean
If you have no choice then
Pour acetone (or suitable fluide from the optic vendor
Dry with nitrogen
Scrub (for hard optics)
Heat the solvents
Use more agressive solvents
Repolish the surface
Etch the surface
Not all cleaning methods are usable on every optic.
Know your optic before implementing any cleaning procedure.
For heavily soiled optics that can withstand detergents and/or distiled water
Store easily stained materials with sensitive coatings in a drawer with desiccant (Gels)
3. Mark optic boxes with ”Fragile” stickers
Check the latest version safety instructions to ensure that you are following the regulations relevant for the cleaning solvents you use