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Processing Technology Of Optical Elements

- Jul 12, 2017 -

The subtle nature of optical elements requires that special procedures be followed in the processing of optical elements to maximize their performance and longevity. In daily use, Optical Components optical elements are exposed to contaminants such as dust, water and grease. These contaminants increase the scattering of the optical surface and the absorption of the incident light, which creates a hot spot on the optical surface, causing permanent damage. The optical elements of the coating are particularly susceptible to such damage.

This article covers common processing and cleaning procedures for a wide range of optical components. Because of the material, size, and refinement of optical elements, it is important to use proper handling and cleaning methods. A suitable method for an optical element may destroy another optical element. For this reason, we recommend that you fully read this article before cleaning the optics. Optical Components If you are using an optical component or a category that is not mentioned in this article, please contact the manufacturer of optical components for advice on handling and cleaning methods.


By using appropriate processing techniques, the number of cleaning optical components can be reduced and their service life improved. Please open the optical element in a clean, temperature controlled environment. Optical Components Do not handle optical elements directly with your hand, because the skin grease will cause permanent damage to the surface of the optical element. Conversely, you can operate with gloves, which are more convenient for smaller optical elements, using optical tweezers or vacuum tweezers. Whatever method is used to clamp an optical element, it can only be clamped along a non optical surface, such as the matte edge of an optical element.

Importance: Holographic grating, notch grating, first unprotected metal reflector, Optical Components and thin film splitter (this is not an exhaustive list) of the optical surface must not 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, splitter, lithium niobate crystals, and electro-optic modulators) are sensitive to temperature and burst when exposed to a thermal shock environment. Therefore, make sure that the packaging and items are placed in a temperature-stabilized environment before opening. These crystals are more brittle than ordinary optical elements, so they are also more careful when cleaning.


Do not place optical elements on a hard surface because the optical elements or contaminants on their surfaces will grind the optical elements. In contrast, most optical elements should be wrapped in lens paper and stored in a storage box specifically designed for optical elements. Typically, these boxes are stored in environments with low humidity, high cleanliness, and controlled temperatures. Optical elements are easily scratched or contaminated, Optical Components and some optical coating elements are hygroscopic, so proper storage is important for protecting optical elements.


In general, you need to check the optical elements before and after use. Because most contaminants and surface defects are smaller in size, we often need to use amplification devices when inspecting optical components. In addition to amplifying the equipment, sometimes we need to use a relatively bright light to illuminate the optical surface, to enhance surface pollutants and defects of the specular reflection strength, so that more easily detect contaminants and defects.

When examining the reflective coating surface, the optical elements need to be raised to a height parallel to your line of sight. Optical elements should intersect with sight, not perpendicular to the optical surface, so that contaminants can be seen rather than reflected. Polished surfaces, such as lenses, Optical Components need 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, a scratch standard plate can be used to classify the size of the defect, that is, to compare the size of the calibrated defect on the standard plate and the size of the surface defect of the optical element. If the size of the defect on the optical surface exceeds the manufacturer's scratch specifications, the optical element needs to be replaced to achieve the desired performance.

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