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Over Thirty Years of Guidance. Since 1994, the APR Design® Guide for Plastics Recyclability has helped companies measure each aspect of a package design against ...

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IR radiation consists of electromagnetic waves, which oscillate with a frequency of 3 × 1011 to 4 × 1014 Hz. The corresponding wavelength range is 103 to 0.78 ...

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Aspheric lenses are used to minimize optical aberrations within the human eye4. Parts of the eye including the tear film, cornea, and crystalline lens can ...

Fresnel Technologies makes a variety of stock Fresnel and related optical components to meet your needs. We can also design and construct custom Fresnel lenses and polymer optics  as requested. Our Fresnel items fall into a number of categories, but they are all made from polymer materials. Generally, our engineers design these components with thicknesses under 1/4" (6 mm) with a stepped surface.

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How do you calculate Field of View (FOV)?. A simplified calculation for 1/4-inch CCTV lens can be made using the following formula: W (horizontal width) ...

by F Lei · 1993 · Cited by 12 — To characterize the aperture size, the numerical aperture (NA) is used in microscope systems, while the f number (FNo) is suited to photographic and video ...

Our team of optical experts can help you bring your project to life with custom or off-the-shelf designs. We’re here to help you find the right solution.

Fresnel Technologies, Inc. specializes in the design and manufacturing of molded plastic Fresnel lenses, molded polymer optics in general, and infrared-transmitting optical materials. We offer design assistance, diamond machining, prototyping, tooling, and production. Stock or custom, we’re your optics partner.

Download the brochure to learn more about the development of our Fresnel lenses, lens specifications, and details on how to order the lens you need.

Fresnel Technologies, Inc. specializes in the design and manufacturing of molded plastic Fresnel lenses, molded polymer optics in general, and infrared-transmitting optical materials. We offer design assistance, diamond machining, prototyping, tooling, and production. Stock or custom, we’re your optics partner.

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Apr 13, 2023 — While hyperspectral data provides a higher spectral resolution, multispectral data shines in spatial detail. The choice between the two should ...

Fresnel Technologies, Inc. specializes in the design and manufacturing of molded plastic Fresnel lenses, molded polymer optics in general, and infrared-transmitting optical materials. We offer design assistance, diamond machining, prototyping, tooling, and production. Stock or custom, we’re your optics partner.

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Today's modern computer-controlled machining methods can be used to cut the surface of each cone precisely to bring all paraxial rays into focus at exactly the same point, avoiding spherical aberration. Better still, newer optical manufacturing methods can be used to cut each refracting surface in the correct aspheric contour (rather than as a conical approximation to this contour), thus avoiding even the width of the groove (typically 0.1 to 1 mm) as a limit to the sharpness of the focus. Even though each groove or facet brings light precisely to a focus, the breaking up the wavefront by the discontinuous surface of a Fresnel lens degrades the visible image quality. Except in certain situations, Fresnel lenses are usually not recommended for imaging applications in the visible light region of the spectrum.