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Optical Components The Cleaning Method

It should be possible to use optical elements in clean, Optical Components low dust environments. As the hands or skin grease will pollute the optical components, Optical Components so take the optical components, Optical Components should wear gloves or finger sets, and as far as possible not to contact the smooth or coated surface.

● Basic principles: If the optical components are not dirty, do not have to clean! Cleaning the optical element increases the chance of contamination or damage, Optical Components so clean the optical element only if necessary

● Determine whether to clean the way: in the vicinity of high brightness light through the reflection or projection effect observation, if you can see the dust or stains, or dust, Optical Components stains caused by the scattering, you need to clean. If necessary, Optical Components the cleanliness of the surface of the optical element can also be observed under a microscope

● Gripping when cleaning: As a result of cleaning the optical components, Optical Components commonly used organic solvents, should try to avoid the hand (even with gloves or finger sets) contact with organic solvents and components. We recommend using tweezers and other tools to hold the optical components, but it is best to use wood, plastic and other materials are softer tweezers. Optical Components If you want to use metal tweezers, Optical Components please also put in the front of the tweezers soft protective material, so as not to damage the surface

Air dust. Since air dust is a non-contact cleaning method, it is suitable for almost all optical components. But do not use the mouth to blow the dust on the components, so as not to spit. Should use the air dust collector (also known as ear wash, skin tiger, rubber blowing, etc.) dust, Optical Components can also use a dedicated compressed air dust. Optical Components After dusting with air, observe the surface of the component and, if it is already clean, do not use lens paper or solvent to continue.

Depending on the material of the optical element, Optical Components choose a different cleaning method:

● lens paper + lens cleaner: hard optical components, hard texture of the coating products, such as: no coated lens, prism, part of the dielectric film mirror. Optical Components This method can not be used for soft materials or soft texture of the coating products, such as: polarized prism, metal mirror and so on.

● Try not to use dry lens paper to wipe the optical components directly. Apply the lens cleaner to wet the lens paper. The lens cleaner is typically a heptane or other isomer mixture detergent.

● lens paper + solvent: If the optical components of the material itself is softer, Optical Components or the texture of the coating is softer, the use of solvent with the lens paper clean.

Several commonly used solvents for cleaning optical components:

1. Acetone, methanol mixed liquid: acetone dissolved grease capacity is strong, but because of acetone evaporation too fast, mixed methanol, can slow down the volatile, Optical Components more conducive to dissolving impurities. Mix ratio can be mastered, generally about 1: 1.

2. Ethanol (alcohol), ether mixed liquid: alcohol is mainly responsible for cleaning, but the volatile slower, easy to absorb the process of evaporation of water in the air, Optical Components reducing the cleaning effect, so increase the ether, to promote evaporation. Mixing ratio may be appropriate control, Optical Components generally about 1: 1, if the air is more humid, can be increased to 1 (ethanol): 2 (ether) around.

3. Acetone or other liquid solvents. Such as aluminum-coated optical components, Optical Components can not be cleaned with ethanol-containing solvents, you can use isopropyl acetate solution clean. White vinegar, or other acidic solvents are sometimes used for cleaning the optical components. Optical Components Such as: hydrofluoric acid (HF) or hydrochloric acid (HCl) can be used to wipe the silicon wafer, nitric acid can be used to wipe the germanium-based lens. Optical Components But usually acidic solution can not be used for zinc sulfide (ZnS) or zinc selenide (ZnSe) components clean.

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