Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
Vacuum deposition is a process used in optical labs to apply ultra-thin, multi-layered lens coatings, such as anti-reflective (AR) treatments. The process occurs in a sealed chamber where air is removed, and the coating material is vaporized.
read more about vacuum deposition on eyeglass lenses ...The process works by placing the lenses in a high-vacuum chamber. The coating material (often metal oxides) is heated until it vaporizes. This vapor then condenses onto the cooler lens surface, forming an extremely thin, durable layer at the molecular level.
Vacuum deposition is the standard method for applying high-quality anti-reflective (AR) coatings and mirror coatings. This precision process allows the lab to apply multiple layers to the lens, each designed to control a different light wavelength.
The process is necessary because AR coatings are only effective if they are applied in layers that are perfect fractions of a wavelength of light. The clean, controlled environment of the vacuum chamber allows for this molecular precision, which cannot be achieved in air.
Vacuum-deposited coatings, like AR treatments, should be maintained with care. Avoid exposing the lenses to excessive heat (like a car dashboard) as this can cause the coating layers to craze or crack. Use only approved cleaning solutions to maintain the integrity of the ultra-thin molecular layers.
No, a complete AR treatment is usually applied to both the front and back surfaces of the lens for maximum glare reduction.
No, AR coating is applied by the lab using a high-tech vacuum deposition process.
No, AR coating reduces visible light reflections. UV protection is a separate feature built into the lens material.
Vacuum deposition is the gold standard for AR coatings. If you find your lenses are difficult to clean or "hazy," the vacuum seal during manufacturing may have been compromised, leading to an unstable coating that can scatter light and cause strain.
Review of Optometry. Technology in the Optical Lab (reviewofoptometry.com). 2024.
Optical Journal. Thin Film Coating Tech (opticaljournal.com). 2024.
The Vision Council. Ophthalmic Lab Standards (thevisioncouncil.org). 2023.
ABDO. Lens Treatments and Coatings (abdo.org.uk). 2024.