U.S. is polarizing faster than other democracies, study finds - polrization

 2024-06-20 16:04:21

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Coherent routinely supplies ZnSe substrates up to 300 mm, and can provide sheet material, core-drilled blanks, edged blanks, generated curved lens blanks, and more.

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Lasers with cutting-edge performance and industrial reliability from the pioneer in ultrafast lasers. Get better data faster and publish more.

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Fabricate high-quality lenses, windows, output couplers, beamsplitters, and other optics with ZnSe produced by a leading manufacturer of the material.

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Use Germanium's unique combination of high refractive index and excellent hardness to build durable, low-power imaging and laser systems with a minimum component count.

ZnSe offers high uniformity and homogeneity for imaging uses and low absorption and scatter for high-power laser applications; its visible light transmission simplifies optical system alignment. ZnSe is also non-hygroscopic and chemically stable.

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In contrast, the U.S. has failed to embrace this ISO standard, and there are some understandable reasons why. As a rule, the ISO optical standard format leaves a lot to be desired (Figure 1). In some ways, the standard is outdated; i.e., surface figure is still specified relative to a test plate. (Most modern interferometers have software to deal with this, but the ISO method for specifying surface form is based on outdated ideas. In addition to not saving time, old test plates can sometimes contain substantial surface form and radius errors. Those errors are not well accounted for by ISO 10110 and can easily propagate into manufactured parts. An easy work-around this issue is to add a radius tolerance to the Radius of Curvature callout in the drawing. This is generally recommended because radius errors are critical. Customers should not assume that a supplier’s test plates are good.) Other issues include formatting that is restrictive, and prism and cube beamsplitter specifications that are rather awkward. This often deters designing engineers. Also, the surface quality callouts can become very complex. This deters suppliers. Another issue with ISO 10110 is that its surface inspection, much like the dimensioned Scratch/Dig standards, requires the use of a microscope to do it properly. Dedicated software that can quickly calculate the size and dimensions of surface defects then becomes necessary; a fully integrated and dedicated system can be an outstanding tool, but such systems can also be very expensive. Many U.S. shops, due to low demand for the standard, have yet to invest in these types of inspection systems. Without them, inspection per the ISO can be incredibly slow and a major cost driver.

Build high-performance common aperture systems that operate across wavelengths ranging from 400 nm to 12 µm with minimal scatter and excellent mechanical properties.

Learn about the vertically integrated capabilities for material growth, fabrication, coating, and assembly, and rigorous QA at Coherent. Discover how these ensure the performance and reliability of our optics and minimize supply chain risks and uncertainties.

It may be applied to optical and radio telescopes (where it is called tapering the antenna), and is particularly important in Fourier transform spectrometers ...

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In this section we deal with plane mirrors. These are mirrors that are flat. In most cases the mirrors we see are pieces of glass with a silvered coating on ...

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by EM Kritchman · 1979 · Cited by 14 — A new linear convex Fresnei lens with its groove side down is described. The design phiiosophy is similar to the highly concentra- ting two focal Fresnel ...

Coherent supports space-based applications with a broad range of components that operate successfully in an environment when there’s no chance for a second chance.

See how we’re helping professionals and institutions — from research facilities and OEMs to hospitals and dentists — achieve better outcomes.

Prism FX is an easy to use custom effect that will fully transform any video clip with the look that makes shooting through prisms so special.