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Cleaning Method Of Optical Components

- Jun 30, 2017 -

The delicate nature of optical components requires that special procedures be followed when handling optical elements, maximizing performance and life. In daily use, the optical components will be exposed to dust, water and skin oils and other pollutants. These contaminants increase the scattering of the optical surface and the absorption of incident light, which creates hot spots on the optical surface, Optical Components causing permanent damage. The coated optical element is particularly susceptible to such damage.

This article covers common handling and cleaning procedures for a wide variety of optical components. It is important to use the correct treatment and cleaning method because of the material, size, and exquisite factors of the optical element. A suitable method for an optical element may destroy another optical element. For this reason, we recommend that you read this article thoroughly before cleaning the optical components. Optical Components If the optical element you are using or its class is not mentioned in this article, please contact the optical component manufacturer for advice and cleaning methods.

deal with

By using the appropriate processing technology, you can reduce the number of cleaning optics and improve their service life. Open the optical element in a clean, temperature controlled environment. Do not deal with the optical components directly, because the skin grease will cause permanent damage to the surface of the optical components. On the contrary, you can take glove operation, it is more convenient for smaller optical components, use optical tweezers or vacuum tweezers. Regardless of the method used to clamp the optical element, Optical Components it can only be held along the non-optical surface, such as the matte edge of the optical element.

IMPORTANT: The holographic grating, groove grating, the first side of the metal mirror without protection, and the optical surface of the thin film splitter (which is not a detailed list) must never be touched by hand or optical operating equipment. These surfaces are particularly sensitive and any physical contact can cause damage.

WARNING: Most crystals (such as calcite, beam splitter, Optical Components lithium niobate crystals, and electro-optical modulators) are temperature sensitive and will burst when exposed to thermal shock. Therefore, before opening, be sure to ensure that the packaging and items placed in a stable temperature environment. These crystals are more fragile than ordinary optical components, Optical Components so they should be handled more carefully when cleaning.


Do not place optical elements on hard surfaces because the optical components or contaminants on their surfaces will worn the optical components. In contrast, most optical elements should be wrapped in lens paper and stored in a storage box designed specifically for optical components. Normally, these boxes will be kept in a low humidity, cleanliness and temperature controlled environment. The optical element is easily scratched or contaminated, and some of the optical coating elements are hygroscopic, so that proper storage is important for protecting the optical element.

an examination

In general, it is necessary to check the optical components before and after use. Because most of the contaminants and surface defects are smaller in size, we often need to use the magnifying device when inspecting the optical components. In addition to amplifying the equipment, sometimes we also need to use a bunch of relatively bright light to illuminate the optical surface, enhance the surface contaminants and defects of the specular intensity, Optical Components so that you can more easily detect pollutants and defects.

When inspecting the surface of the reflective coating, the optical element needs to be held at a height parallel to your line of sight. The optical element should intersect the line of sight, rather than perpendicular to the observed optical surface, so that contaminants can be seen instead of reflected light. Optical Components Polishing the surface, such as a lens, needs to be perpendicular to your line of sight, so that you can check the transparency of the entire optical element.

If there is a surface defect on a clean optical surface, the size of the defect can be categorized using a scratch standard plate, that is, comparing the dimensions of the calibrated defect on the standard disc and the size of the surface defects of the optical element. If the size of the defect on the optical surface exceeds the manufacturer's scratch specification, the optical element needs to be replaced to achieve the desired performance.

Cleaning procedures

If possible, be sure to read the manufacturer's recommended cleaning and operating procedures. Since the cleaning of the optical components is all concerned with the operation of the optical components, use the operating instructions described below in accordance with the appropriate operating procedures. If it is clean or improperly handled, it will cause permanent damage to the optical components.

Before cleaning the optical components, check the optical components to determine the type and severity of the contaminants. This inspection step can not be skipped because the cleaning process of the optical element usually involves the solvent and the physical contact with the optical surface, Optical Components which may cause damage to the optical element if the treatment is too frequent.

The cleaning sequence of the optical elements adhering to a variety of contaminants is important so that the optical surface is not destroyed by other contaminants when removing a contaminant. For example, if an optical element is contaminated with both oil and dust, wiping the oil will scratch the optical surface. This is because the dust will rub along the surface when wiping.

Blow the surface of the optical element

Before making any other cleaning technology, it is usually necessary to blow away dust and other loose contaminants. This method requires the use of an inert dust removal tank or a blast ball. Do not blow the surface directly against the surface of the optical element because it is likely to deposit saliva on the optical surface.

If you are using an inert dust removal gas, Optical Components place the tank in the whole process before and during use. Do not shake the tank before use or when using it. And align the nozzle with the optical element far before blowing. These steps help to prevent the inert gas propellant from depositing on the optical surface. If you use a filling gas, keep the tank away from the optical element by about 6 inches and use the short blow method. The nozzle of the inert gas tank is rotated so that its nozzle forms a grazing angle with the surface of the optical element. For large-sized optical element surfaces, the optical surface is blown along the pattern below.

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