Each AR coating manufacturer has its own proprietary formula, but generally all anti-reflective coatings consist of multiple microscopic layers of metallic oxides of alternating high and low index of refraction.

Screens, printers, and similar retailer device drivers are examples of this kind of software, together with data mining tools and OS functionalities with memory management or similar processes.

If the COTS package is more than five years old, it could be in a legacy language, which means the vendor will find it challenging to improve or modify it anyway. It could be more practical to enhance the organisation's existing system.

High definition lenses enable patients to enjoy up to 20 percent wider vision channel for both intermediate and near distances.

While the lens racks are rotating in the coating chamber, a power source within the machine focuses a beam of electrons onto a small crucible that contains a series of metal oxides in separate compartments.

Finally, many contracts have fine print that traps clients in agreements they otherwise wouldn't tolerate. For example, vendors might charge fees for reinstalling the COTS software in a different machine. Conversely, the contract might not have provisions indicating support where needed; for instance, it should spell out what the client could expect regarding emergency maintenance or operational vulnerabilities.

These benefits are due to the ability of AR coating to virtually eliminate reflections from the front and back surfaces of your eyeglass lenses. With reflections gone, more light passes through your lenses to optimize visual acuity with fewer distractions (especially at night), and the lenses look nearly invisible — which enhances your appearance by drawing more attention to your eyes and helping you make better "eye contact" with others.

Before investing in COTS, a team should analyse the growth they anticipate and manage their expectations. If there are errors in the initial gap analysis, it could cause setbacks in future implementation. A full-cost analysis factoring in costs over five years is best, especially if the software requires ongoing licencing and maintenance.

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Depending on your lifestyle, your optician might suggest a specific brand of anti-reflective coating. If you spend a lot of time working at a computer, you might benefit from an AR coating that filters out blue light.

Some anti-reflective lenses have surface treatments that are both hydrophobic and "oleophobic" (also called lipophobic), which means they repel both water and oil. These combination treatments typically contain fluorinated materials that give the lenses properties that are very similar to those of nonstick cookware.

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Word processors, spreadsheets, development environments like Visual Basic and Sybase, libraries that require connecting with existing codes like browser add-ons, game or graphics engines, and Windows DLLs are all examples of COTS software.

Using COTS, though, brings significant drawbacks. For one, a vendor could cease support for it, or the software developers could go out of business, so the customer would have to look for different software.

The first step in the AR coating process is to meticulously clean the lenses and inspect them for visible and microscopic surface defects. Even a tiny smudge, piece of lint or hairline scratch on a lens during the coating process can cause a defective AR coating.

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When the coating materials are bombarded by electrons, they vaporize within the coating chamber and adhere to the surfaces of the lenses — creating a uniform, microscopically thin optical layer on the lens.

Some eyeglass lenses have factory-applied AR coating on both lens surfaces. Other lenses, particularly progressive lenses and other multifocal lenses (bifocals and trifocals), have the coating applied after the lenses have been customized to your eyeglass prescription by an optical lab.

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For example, regular plastic lenses reflect roughly 8 percent of light hitting the lenses, so only 92 percent of available light enters the eye for vision. High index plastic lenses can reflect up to 50 percent more light than regular plastic lenses (approximately 12 percent of available light), so even less light is available to the eye for vision.

When choosing commercial off-the-shelf software, you need to find one that integrates with your organisation's legacy systems. You must also decide between single-user-licence and general licence options; if you have a large organisation or department using the software, it is better to get the latter. Consider as well the need for upgrades and maintenance. Ideally, you should get software that needs less maintenance and costs less to upgrade.

By eliminating reflections, AR coating also makes your eyeglass lenses look nearly invisible so people can see your eyes and facial expressions more clearly.

Furthermore, the software may need customisation to fit specific business functionalities, defeating the purpose of getting something ready-made. Finally, when you have the same COTS software for several users or using one with periodic licensing, it could be more expensive in the long run.

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Anti-reflective coating also is a good idea for sunglasses, because it eliminates glare from sunlight reflecting into your eyes from the back surface of tinted lenses when the sun is behind you. (Generally, AR coating is applied only to the back surface of sunglass lenses because there are no cosmetic or visual benefits to eliminating reflections from the front surface of dark-tinted lenses.)

Anti-reflective coatings are incredibly thin. The entire multilayer AR coating stack generally is only about 0.2 to 0.3 microns thick, or about 0.02 percent (two one-hundredths of 1 percent) of the thickness of a standard eyeglass lens.

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AR coating is especially beneficial when used on high-index lenses, which reflect more light than regular plastic lenses. Generally, the higher the index of refraction of the lens material, the more light that will be reflected from the surface of the lenses.

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Since each layer affects different wavelengths of light, the more layers there are, the more reflections that are neutralized. Some high-quality AR coatings have up to seven layers.

A significant advantage of using COTS is that the time needed to purchase this software is much shorter than the time it takes to develop it. As such, it uses fewer resources like human capital, office space, and money. COTS also has a greater chance of incorporating industry standards. They depend less on the platform, which means excellent reliability across environments and uses.

Typically, a production line includes multiple washing and rinsing baths, including ultrasonic cleaning to remove any traces of surface contaminants. This is followed by air drying and heating of the lenses in special ovens to further remove unwanted moisture and gases from the lens surface.

The visual benefits of lenses with anti-reflective coating include sharper vision with less glare when driving at night and greater comfort during prolonged computer use (compared with wearing eyeglass lenses without AR coating).

Today's modern anti-reflective coatings can virtually eliminate the reflection of light from eyeglass lenses, allowing 99.5 percent of available light to pass through the lenses and enter the eye for good vision.

The lenses are then loaded into special metal racks with spring-loaded openings so the lenses are held securely but with virtually all lens surfaces exposed for the coating application. The racks are then loaded into the coating chamber. The door of the chamber is sealed, and the air is pumped out of the chamber to create a vacuum.

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Applying anti-reflective coating to eyeglass lenses is a highly technical process involving vacuum deposition technology.

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Most premium AR lenses include a surface treatment that seals the anti-reflective layers and makes the lenses easier to clean. "Hydrophobic" surface treatments repel water, preventing the formation of water spots.

‍The US government's Federal Acquisition Regulations classifies COTS as NDIs, or non-developmental items applied under contract to the government. This kind of software is an alternative to in-house projects, and it costs less in the short term to purchase, develop, and maintain. Here is a closer look at COTS software.

COTS can be a viable, affordable solution for companies looking for a system they can implement at once. Sometimes, though, this is more of a burden than a bargain. Before getting COTS software, check if a rewritten, modern application is a better option for your company. Often, what you need is a solution uniquely for your organisation.

We offer UV grade fused silica (UV FS) plano-convex lenses with focal lenghts from 25 to 5000 mm and diameters from 12.5 to 50 mm. Custom coating availible.

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Anti-reflective coating (also called "AR coating" or "anti-glare coating") improves vision, reduces eye strain and makes your eyeglasses look more attractive.

When cleaning AR-coated lenses, use only products that your optician recommends. Lens cleaners with harsh chemicals may damage the anti-reflective coating.

Also, don't attempt to clean AR-coated lenses without wetting them first. Using a dry cloth on a dry lens can cause lens scratches. And because anti-reflective coating eliminates light reflections that can mask lens surface defects, fine scratches often are more visible on AR-coated lenses than on uncoated lenses.

Depending on the AR coating formula, most lenses with anti-reflective coating have a very faint residual color, usually green or blue, that is characteristic of that particular brand of coating.

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When applied to photochromic lenses, AR coating enhances the clarity and comfort of these premium lenses in all light conditions without reducing their sun-reactive performance.

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