Our 365-Day Guarantee means you’re eligible for a one-time replacement pair within 12 months of purchase if there are clear defects in material and workmanship — so be good to your glasses!

fresnellens中文

Anti-reflective coating glasses lenses are practically invisible, so your eyes will look better and your stylish frames can take center stage.

Fresneldiffraction

The linked Zemax files are a theoretical approximation of the performance of each lens. In place of a grooved structure, each file models a sloped surface with infinitesimal thickness at each radial position. This creates limitations, including the inability to view scattering information due to the pitch and groove spacing of the lens. In addition, the optical coefficients in each file are not from the data used at manufacturing; the coefficients are calculated using the necessary optical prescription to focus collimated light at the proper axial distance from the back surface of the lens. These limitations reduce the realistic modeling of the Fresnel lenses sold below.

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Fresnellens

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Fresnelreflection

Our 365-Day Product Guarantee allows a one-time replacement pair of eyewear within 12 months, if any defects in the material or workmanship are found that prevent you from enjoying your frames to the fullest.

We want you to be 100% happy with your eyewear. With 14-Day Free Returns, you can get a one-time replacement or refund within two weeks of receiving your order — no questions asked!

Fresnelequation

Progressive lenses are a type of bifocal lens that features a gradual change between near and distance vision correction. The premium version offers a wider field of vision.

Our lenses are offered in 1/2", 1", and 2" diameters, and they provide high transmission in the 400 - 1100 nm spectral range (see graph at right). As shown in the schematic at the top of the page, they consist of a grooved side and a plano side. In order to minimize the substrate thickness, stepwise discontinuities are introduced at regular radial spacings, creating grooves. Hence, Fresnel lenses can be thought of as a series of concentric rings.

Fresnellight

Thorlabs also offers aspheric condensers with diffusive surfaces that provide uniform illumination in the far field, as well as a complete selection of lenses.

An anti-reflective (also known as anti-glare) coating prevents reflections from appearing on both the inside and outside of your eyeglass or sunglass lenses. No reflections on your lenses means more light is reaching your eyes, which inevitably improves your vision.

Thorlabs' Fresnel Lenses offer light focusing and collimation without the bulk associated with traditional lenses. Our Fresnel lenses are effectively 1.5 mm thick across their entire diameter, and this uniform thickness, combined with the optical-grade acrylic substrate, reduces their weight by over 90% versus glass lenses of comparable focal length and diameter.* These properties make them ideal for building compact optical systems.

Fresnelscreen

Blue light filtering lenses filter blue-violet light (blue-violet light is between 400-455nm, as stated by ISO TR 20772:2018​ and can accelerate aging of the retina) emitted mainly by the sun outdoors and indoors through windows, plus some artificial light sources like digital screens and fluorescent lights.

Glasses with Transitions® lenses automatically darken in sunny conditions and become clear when it’s darker. This allows them to work as both eyeglasses and sunglasses.

All single vision EyeBuyDirect lenses come standard with an anti-reflective coating. High-index lenses naturally reflect more light, so this is an important addition if you’re interested in thinner lenses.

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Glasses with single vision correction lenses. They help with seeing either at a distance or near, depending on the wearer’s needs.

Fresnel lenses are often used to homogenize the output of LEDs, focus light onto a point detector, or concentrate sunlight into solar cells. For the lenses sold on this page, each step has a 10° pitch (illustrated by the diagram in the Specs tab). This pitch angle causes distortions that make the lenses unsuitable for imaging applications.

Glasses with lenses that help the wearer see things up close. Many people need reading lenses as they get older due to a common condition called presbyopia.

To mount our Fresnel lenses, we recommend using our LMR05(/M), LMR1(/M), or LMR2(/M) Fixed Lens Mounts, which use a retaining ring to secure the optic. Do not overtighten the retaining ring since this may cause the grooves to wear. Our rubber Stress-Free Retaining Rings can be used in place of the standard aluminum rings to reduce the stress on the optic surface. The grooved side of the lens should be oriented to face the collimated beam, and the plano side should face the divergent source. The JEL10 Eye Loupe can help determine which side of the lens is grooved. Since the lenses are only 1.5 mm thick, they are too thin for mounts that hold optics with setscrews.