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Absolutely. Using our reglazing service, you can choose whether to have your existing frames reglazed or have your prescription lenses put into any frame you like via our free-post service. Order a pack from us and select the coatings and prescription you need, and Lensology will reglaze your lenses to order. Our anti-reflective coating is available on all lens types, including single vision, sunglasses lenses, bifocal lenses, varifocal lenses, and more. For more information, read our FAQs or get in touch today.

Figure 3: The electric field of elliptically polarized light consists of two perpendicular linear components with any amplitude and any phase difference. The resulting electric field describes an ellipse.

The two orthogonal linear polarization states that are most important for reflection and transmission are referred to as p- and s-polarization. P-polarized (from the German parallel) light has an electric field polarized parallel to the plane of incidence, while s-polarized (from the German senkrecht) light is perpendicular to this plane.

Figure 1: The electric field of linearly polarized light is confined to a single plane along the direction of propagation.

polarization中文

Material stress can be quantified in transparent objects using the photoelastic effect. Stressed material becomes birefringent, and the stress and its related birefringence can be measured by using polarized light.

For linearly polarized light with intensity I0, the intensity transmitted through an ideal polarizer, I, can be described by Malus’ law,

In order to select a specific polarization of light, polarizers are used. Polarizers can be broadly divided into reflective, dichroic, and birefringent polarizers. More detailed information on which type of polarizer is right for your application can be found in our Polarizer Selection Guide.

Elliptical polarization

We provide a free postal pack that is delivered straight to your door, inclusive of a free return postage box for your frames. You’ll just need to provide a few simple details and then we can get it over to you ASAP!

While polarizers select certain polarizations of light, discarding the other polarizations, ideal waveplates modify existing polarizations without attenuating, deviating, or displacing the beam. They do this by retarding (or delaying) one component of polarization with respect to its orthogonal component. To help you determine which waveplate is best for your application, read Understanding Waveplates. Correctly chosen waveplates can convert any polarization state into a new polarization state, and are most often used to rotate linear polarization, to convert linearly polarized light to circularly polarized light or vice versa.

With more light transmitting into your eyes (99% in fact), you can fully see what’s ahead of you—providing sharper images, crisper contrasts, and more confidence in your sight.

Circularlypolarized light

Light is an electromagnetic wave, and the electric field of this wave oscillates perpendicularly to the direction of propagation. Light is called unpolarized if the direction of this electric field fluctuates randomly in time. Many common light sources such as sunlight, halogen lighting, LED spotlights, and incandescent bulbs produce unpolarized light. If the direction of the electric field of light is well defined, it is called polarized light. The most common source of polarized light is a laser.

Although they sound very similar, the main difference is anti-glare protects from external light sources; diffusing light which bounces off surfaces (such as roads, water or snow) and causes that blinding glare. Whereas anti-reflective lenses go one step further by diffusing both internal and external light sources and removing reflections within your lenses.

Polarization oflight

Figure 6: For more information on using polarization to measure stress, read Successful Light Polarization Techniques or Contact Us.

Edmund Optics is a leading supplier of optics and optical components, designing and manufacturing a wide array of multi-element lenses, lens coatings, imaging systems, and opto-mechanical equipment. EO’s state of the art manufacturing capabilities combined with its global distribution network has earned it the position of the world’s largest supplier of off-the-shelf optical components. Customers can purchase items by calling 1-800-363-1992, via the catalog or the website at http://www.edmundoptics.com/

Where θ is the angle between the incident linear polarization and the polarization axis. We see that for parallel axes, 100% transmission is achieved, while for 90° axes, also known as crossed polarizers, there is 0% transmission. In real world applications the transmission never reaches exactly 0%, therefore, polarizers are characterized by an extinction ratio, which can be used to determine the actual transmission through two crossed polarizers.

By eliminating the reflection of streetlights, headlights or even your dashboard, you are increasing your vision clarity, helping you stay more alert and reactive on the road.

People working in offices or with digital screens are often exposed to more artificial light which bounces off their lenses. Anti-reflection can reduce this, supporting your eye health.

Unpolarized light can be considered a rapidly varying random combination of p- and s-polarized light. An ideal linear polarizer will only transmit one of the two linear polarizations, reducing the initial unpolarized intensity I0 by half,

Dichroic polarizers absorb a specific polarization of light, transmitting the rest; modern nanoparticle polarizers are dichroic polarizers.

Electric polarization

Anti-reflective lenses become invisible to the camera, so you can enjoy no more reflections in your lenses from flashes or selfies, creating better-quality photos.

As we said, anti-reflective glasses can be worn by anyone and applied to any style of glasses, including sunglasses. Meaning they can be worn all year round, within any setting.

Understanding and manipulating the polarization of light is crucial for many optical applications. Optical design frequently focuses on the wavelength and intensity of light, while neglecting its polarization. Polarization, however, is an important property of light that affects even those optical systems that do not explicitly measure it. The polarization of light affects the focus of laser beams, influences the cut-off wavelengths of filters, and can be important to prevent unwanted back reflections. It is essential for many metrology applications such as stress analysis in glass or plastic, pharmaceutical ingredient analysis, and biological microscopy. Different polarizations of light can also be absorbed to different degrees by materials, an essential property for LCD screens, 3D movies, and your glare-reducing sunglasses.

An anti-reflective coating can be applied to both prescription and non-prescription lenses, so no matter your lifestyle, everyone can benefit from anti-reflective glasses! With laptops, phones and digital devices becoming more constant in our day-to-day lives, anti-reflective coatings help protect your eyes from excess LED or artificial light, these are more commonly known as blue light glasses. If you drive a lot, especially at night, anti-reflective can also reduce the distraction of blinding reflections, allowing you to have a clear sight of the road or potential hazards ahead.

Have you ever found yourself squinting because light (real or artificial) is reflecting into your line of sight? Anti-reflective lenses eliminate these frustrating reflections. Also known as anti-glare or AR, this particular coating removes scattered light which reflects on the front and back of your glasses lenses. Permitting up to 99% of light into your eye ultimately enhances your vision, creates sharper visuals and allows others to see you more clearly too.

Birefringent polarizers rely on the dependence of the refractive index on the polarization of light. Different polarizations will refract at different angles and this can be used to select certain polarizations of light.

Reflective polarizers transmit the desired polarization while reflecting the rest. Wire grid polarizers are a common example of this, consisting of many thin wires arranged parallel to each other. Light that is polarized along these wires is reflected, while light that is polarized perpendicular to these wires is transmitted. Other reflective polarizers use Brewster’s angle. Brewster’s angle is a specific angle of incidence under which only s-polarized light is reflected. The reflected beam is s-polarized and the transmitted beam becomes partially p-polarized.

Figure 2: The electric field of circularly polarized light consists of two perpendicular, equal in amplitude, linear components that have a phase of difference of π/2. The resulting electric field describes a circle.

Polarization

Excess light naturally causes our eyes to squint in order to protect our eyes and focus on what’s in front of us. Less squinting will reduce eye strain, tiredness and headaches too.

Anti-reflective coating is made up of a thin chemical layer which is applied to both the front and back of your lenses. It is a very effective coating which eliminates the unnecessary light which causes glare and reflective distractions. Instead, it emits more light into your eye, helping improve vision. On average, anti-reflective lenses can last up to 2 years, if correctly cared for.

Implementing polarization control can be useful in imaging applications. By placing a linear polarizer over the light source, the lens, or both, it is possible to eliminate glare and hot spots from reflective objects or bring out surface defects.

Polarization is also very important in the chemical, pharmaceutical, and food and beverage industries. Many important chemical compounds, such as active pharmaceutical ingredients or sugar, are “optically active” and rotate polarized light. The amount of rotation is determined by the nature and the concentration of the compound, allowing polarimetry to detect and quantify these compounds.

Due to the delicacy of this coating, you should only use recommended cleaning products on your anti-reflective lenses. Always wet your lenses first before cleaning them with a cloth; they can be easily scratched which is more noticeable on AR lenses.