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For example, Figure 3shows the reflectance when the number of layers is 11 when HR coating is applied so that the optical film thickness is λ/4 (λ = 550 nm). Figure 4 shows that as the number of layers is increased, the reflectance approaches 100%. At a wavelength of 550 nm, the reflectance of 11, 21, and 31 layers is 98%, 99.9%, and 99.999%, respectively.

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By means of birefringence, unpolarized light is divided into two rays. Polarization of the ordinary beam runs perpendicular to the optical axis, the extraordinary beam, however, oscillates parallel to the optical axis of the crystal.

The type of interference that occurs depends on the thickness of the coating and the wavelength of the light. If the thickness of the coating is a quarter of the wavelength of the light, then the waves will interfere constructively, resulting in high reflectance. This is known as a quarter-wave coating.

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Optical coatings work by interfering with the light waves that are reflected or transmitted by the optical component. When light waves are reflected from a surface, they can interfere with each other constructively or destructively. Constructive interference occurs when the waves are in phase with each other, and destructive interference occurs when they are out of phase with each other.

Optical coatings are thin films that are applied to optical components to control their reflectance, transmittance, or polarization properties. They are used in a wide variety of applications, including lasers, telescopes, cameras, and medical devices.

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Optical coatings are a rapidly evolving field. New coating materials and coating techniques are being developed all the time. This is leading to new and improved applications for the coatings. In the future, optical coatings are likely to play an even more important role in a wide variety of technologies. To discuss your next project, contact us or request a quote! Our expertise in coating technologies and coating design can help you achieve high-performance optical surfaces for your specific needs. Please contact us if you’d like to schedule a  consultation or request for a quote on your next project.

With beam splitter cubes, single wavelengths or small wavelength ranges can be split extremely efficiently at a very reasonable price. In general, two different types of polarization optics are used: Polarisation as a result of a coating and as a result of birefringency.

Polarizing beam splitting cubes are mainly used because of their easy alignment feature. The cube polarizers are usually cemented and beam splitting occurs at a 90° angle. We offer both narrow band and broadband versions of different quality levels. Special designs were developed for high power laser applications and feature damage thresholds in the J/cm2 range.

Optical coatings can be customized to meet the specific requirements of an application. For example, a mirror for a laser might require a coating that has high reflectance at a specific wavelength. Or, a telescope might require a coating that has high transmission in a specific wavelength range.

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