FresnelLensfor sale

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.

Fresnel lenses are constructed of many (in this case hundreds) of concentric grooves. These grooves are essentially cross-sections of traditional lenses collapsed into each other. The result is a versatile lens with a large surface area, but without the thickness of a traditional lens with a similar surface area. Use this lens for a range of light and optics activities and in conjunction with Arbor Scientific’s Introductory Optical System (92-7700).

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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)

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Fresnel lenses overcome this by chopping the curved surface of a convex lens into concentric rings and placing them all into one plane, ...

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FresnelLensprice

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.

Fresnellenslighthouse

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.

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!

How does a Fresnellenswork

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.

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.

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

Products being sold are not toys. They are for Educational / Laboratory use only. They are not for use by children 12 and under.

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.

This rigid, shatter-proof acrylic Fresnel lens is ideal for optics activities where gathering light is the priority. Dimensions: 8.5” x 11” x 5/64” (21.6 cm x 27.9 cm x 0.2 cm). Focal Length: 33 cm.

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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.

What Are Fresnel lenses used for

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

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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.

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

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.

FresnelLensSheet

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.

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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.

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This rigid, shatter-proof acrylic Fresnel lens is ideal for optics activities where gathering light is the priority. Dimensions: 8.5” x 11” x 5/64” (21.6 cm x 27.9 cm x 0.2 cm). Focal Length: 33 cm.

And what do those terms refer to anyway? Well – let's start with the basics. Spheric and aspheric refer to the shape of the lens. A spherical lens has a ...

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.

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!

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.

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

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.

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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.

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.

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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.