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The Method Of Preserving Optical Elements

- Aug 03, 2017 -

Optical components in the production process, need to be cut, milling, grinding and forming, in the coarse grinding, fine grinding and polishing process can be used.

The method of preserving optical elements

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, Optical Components these boxes are stored in environments with low humidity, high cleanliness, and controlled temperatures. Optical elements are easily scratched or contaminated, 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. 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, Optical Components not perpendicular to the optical surface, so that contaminants can be seen rather than reflected. Polished surfaces, such as lenses, 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. Optical Components 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.

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.


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, Optical Components temperature controlled environment. 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, Optical Components first unprotected metal reflector, 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.

Cleaning optical Elements

If approved by the manufacturer, the fingerprint and large dust particles can be removed by soaking in distilled water and in the optical soap. The immersion time of optical elements shall not be longer than the time required to remove contaminants. After that, use clean distilled water to clean the optical elements. Optical Components Depending on the type of optical element, you can choose to drag and drop the wiping paper (applicator) method to accelerate drying by applying acetone, methanol, or another fast-drying solvent, such as travelsafe precision optical detergent, to optical elements. Avoid cleaning solvents during drying to form small droplets, which often leave water stains on the optical surface.

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