This is ideal for use in laser eye protection applications, where the eye would need to be protected from laser light that is incident over a variety of angles. Figure 2 shows an example of how such a filter might be peaked around a certain wavelength.

We’ve all been there: Unpleasant glare from oncoming traffic or street lights impairing our vision. This is tiring for drivers and can even become dangerous.

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Another coating level with antistatic function can also help keep your glasses cleaner: fluff – from clothes, for example – adheres to these lenses much less.

With DuraVision DriveSafe, 64% of wearers tested said they experienced fewer problems with glare thanks to the new coating compared to other premium anti-reflective coatings. Source: Internal wearer trial (CZV employees in Germany), external wearer trial (eye care professionals and consumers in Spain)

A premium lens coating can help, one that’s integrated into the  ZEISS DriveSafe lenses. This reduces the subjective sensation of glare1 – e.g. from oncoming vehicles with LED or Xenon headlights – and effectively protects your lenses from both scratches and the adhesion of dirt particles.

Notch filters, or stop-band filters, are used for a variety of applications, where some wavelengths need to be transmitted, and others need to be blocked and/or reflected.

While notch filters can be designed for various bandwidths, narrow band filters are more common. Filters with narrower bandwidths and denser blocking will require thicker coatings. These coatings can be more expensive and exhibit high levels of stress.

A rejection filter, also known as a band-stop or stop-band filter is the opposite of a bandpass filter. It is a type of filter that rejects frequencies within the band and transmits frequencies outside of the band.

Optical communication systems use them in order to block any distortions that can occur in the pathway of light. Notch filters are commonly used for laser safety applications, such as laser eye protection. In this case, safety glasses are coated and designed to reject potentially harmful laser wavelengths.

Lens manufacturers want to make it easy for their customers to select a coating, which is why they offer packages for different coatings. And ZEISS is no exception: with the  DuraVision®  Premium lens coatings, you receive a complete package comprising top anti-reflective, hard, antistatic and CleanCoat coatings.

Just like a lotus leaf, water beads right off thanks to the wetting properties of the coating. A great bonus, particularly for anti-reflective lenses, because you’re more likely to notice dirt through improved reflection reduction than on lenses without such a coating.

Antireflective glasses Specsavers

Special coatings with a hard lacquer matched to the material not only enhance the scratch resistance of the lenses, they also ensure constant visual quality and extend durability. Thanks to the DuraVision®  Platinum coating, ZEISS offers a solution that is three times harder than the previous generation of hard (AR) coated plastic ZEISS lenses and 35% harder than AR coated mineral (glass) ZEISS lenses. This is made possible by the way ions seal the lens when the coating is applied.  Read on to find out more.

The residual reflection is usually green. The modern Duravion®  Premium lens Coating from ZEISS has an attractive, bluish residual reflection. The barely perceptible bluish residual reflection increases the amount of light the lens transmits to your eyes. And not only that – the blue is less visible to the eye. This means lenses with this residual reflection have the advantage of making your eyes look clearer to other people and have fewer reflections. Your eyes look more natural, almost as if you’re not wearing glasses at all.

Formerly only needed when the sun was shining brightly, sunglasses with a  mirror coating  are now very much in vogue – and they’re available in your prescription! Talk to your optician today to see the wide range of colours and functions available for sunglass coatings.

Anti-reflective lenses can be recognized by the residual reflection. Regardless of the material used for the lenses, they have a characteristic colour when you hold the glasses at a slight angle against a white background. This is highly practical for the wearer: the optician can identify the anti-reflective coating and even offer the same high quality if a switch to another material is desired.

Just ask your optician. Choosing the right coating also matters if you’re buying children’s glasses or a second pair for yourself – so don’t leave this important decision to chance!

It’s all about protecting your eyes from the sun and glare when you’re outdoors. You and your optician can create your ideal sunglasses in terms of both colour and style. Coloured coatings for sunglasses are available for plastic and mineral lenses. A  wide selection of lens tints  – from single colours and gradient tints to bi-colour or even special tints for medical purposes – feature in the range of sunglasses from ZEISS. So your glasses, whether single vision or progressive lenses, will become your favourite accessory that also delivers first-class protection against the sun.

Certain notch filters can be used over relatively wide angle ranges. For these type of filters the rejection band will be centered in such a way that allows sufficient rejection over the entire angle range.

Spectroscopy is one of the main scientific instruments used within life sciences research and technology. With the help of these filters, scientists can better assess the characteristics of molecules through the isolation of specific wavelengths of interest.

Contact our design team to discuss your specific requirements including: transmission wavelength range, steepness of cut on and cut off transitions, optical density, angle of incidence and incident medium.

Traditional band stop filters will also have harmonic rejection bands. These harmonic bands are only of concern in applications where wide pass bands are required.

For plastic lenses (organic lenses) you definitely need a hard lacquer coating. While plastic lenses are easy to wear, the material used is softer and more prone to scratches than glass lenses (a.k.a. mineral lenses) – at least if untreated.

Anti reflectionglasses

Lens coatings act as a protective coating for your lenses, transforming modern plastic lenses into strong everyday objects. Unfortunately, lens coatings are often not given the importance they deserve when people purchase a pair of glasses, with wearers pretty much leaving this decision up to the optician. To make sure you’re well-prepared when it comes to anti-reflective, hard, CleanCoat and other coatings, we’ve put together a guide to help you find your way around the maze of coatings. After all, the choice is yours!

Optical density plays an important role in determining the strength of a filter. Optical density measurements can aid in the measurement of biomass concentration, growth of a culture of microorganisms, and other analytical techniques within the life science industry.

We can adjust coating designs to eliminate harmonic rejection bands; however, such coatings will be thicker and more complex. Figure 1 shows and example with harmonic rejection bands and where the harmonic rejection bands have been eliminated.

One thing’s for sure: Light has a considerable effect on managing our internal body clock, and thus our sleep patterns. Strong light in the early evening tells your body to stay awake for longer. When you look at the screen on your computer or another digital device, you subject your eyes to large quantities of blue light, causing such things as reduced contrast sensitivity. Focusing on a screen can also be strenuous for you and your eyes, and contribute to digital eye strain.

How can you recognize the ZEISS DriveSafe coating? The ZEISS DriveSafe coating is evident from a slightly violet residual reflection on the lens, which is barely visible and therefore not distracting.

Antireflective coating spray

Anti reflectioncoating

Self-tinting lenses are a great idea for anyone who doesn’t want to change their glasses in the sun as these lenses incorporate a special technology which adapts to the sun – e.g.  PhotoFusion X by ZEISS

Our vision has changed enormously now that we use digital devices such as smartphones, tablets, and modern illumination through LEDs and displays. We are subjected to more blue light than ever – all day long, in fact. High-energy blue light is also believed to have a negative impact on vision over the long term.

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anti-glare什么意思

Typical rejection filters provide up to 85% peak transmission. Designs are available for deposition onto glass, crystals, semiconductor materials, fiber ends, polymers and other temperature sensitive materials.

Antireflective glasses vs blue light

Notch Filters are designed to block or reject a certain wavelength region while allowing the light on either side of the blocking region to pass through. They can be viewed as an inverse of a bandpass filter.

So why not talk to your optician about the anti-reflective coating services on offer and about the coatings’ durability today! Ask for their tips about what you need to look out for to ensure your coating lasts as long as it ought to.

Lenses without an anti-reflective coating have a great disadvantage:  There is a lot of visible reflection for the wearer. These reflections are particularly distracting on wet roads or when driving at night, but also when talking to someone as that person will see themselves reflected in your glasses rather than look at you.

Lenses can help protect your eyes against blue light thanks to a special filter, making it easier to work at a computer or use digital devices. Thanks to DuraVision® BlueProtect from ZEISS, you receive a premium lens coating together with a blue light filter, which is great for all wearers who are often indoors and find that the light emitted by LED light bulbs, TVs or computer monitors makes them tired or uncomfortable. It is therefore advisable to opt for this lens coating, even for glasses you need for work or when watching TV.

Unfortunately, no coating will mean never having to clean lenses again. However, lenses can be coated in such a way that impurities are less likely to adhere to the lens. CleanCoat makes the lens surface smooth, making it more difficult for dirt and dust to adhere. This simplifies lens care tremendously. The smoother the lens surface, the better.

Many forms of spectroscopy use these types of filters in order to assess the vibrational and rotational characteristics of crystal and molecular structures. This ability can be helpful in assessing forensic evidence, drug detection, identification of an unknown substance, as well as how molecular structures react in certain environments.

Like other filters, a notch filter can also be designed for various rejection levels, which is typically specified in terms of optical density (OD). The optical density (OD) is defined by a numerical value that coincides with a % transmission through a given medium. Table 1 shows this relationship via the equation given below.

It enables transparent, clear and unimpaired vision, makes glasses more attractive and permits uninterrupted and reflection-free vision for the wearer.