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Optics Components and Electronic Equipment
Published in Vadim Backman, Adam Wax, Hao F. Zhang, A Laboratory Manual in Biophotonics, 2018
Vadim Backman, Adam Wax, Hao F. Zhang
An optical coating is composed of one or more thin film layers deposited on the surface of an optical component (such as a lens or mirror) to enhance its transmission or reflection properties. The performance of the coating depends on the number of layers and their respective thickness, as well as their composition. The refractive index differences between multiple layer interfaces provide for their unique transmission or reflective behavior.
Coating
Published in Christoph Gerhard, Optics Manufacturing, 2018
Depending on the final function of an optical coating, different coating materials can be used. There are two main categories of optical coatings: metallic and dielectric; the latter type is applied in most cases. This type of coating consists of at least one but usually more thin layers made of transparent dielectric media. A selection of commonly used dielectric coating media is listed in Table 11.1.
Isotropic Amorphous Optical Materials
Published in Daniel Malacara-Hernández, Brian J. Thompson, Advanced Optical Instruments and Techniques, 2017
Luis Efrain Regalado, Daniel Malacara-Hernández
Most of the techniques used to prepare thin films yield amorphous or poly-crystalline materials in a two-dimensional region, because the thickness is always of the order of a wavelength. The most common materials used in optical coatings are metals, oxides, fluorides, and sulfides. Their optical properties may vary because the method of evaporation produces different density packing in thin films than in bulk materials. The dielectric function may be studied in situ or ex situ by analyzing the spectral transmittance and reflectance and by weighing the deposited materials.
Mathematical investigation of the error self-compensation mechanism in optical coating technology
Published in Inverse Problems in Science and Engineering, 2018
Alexander Tikhonravov, Igor Kochikov, Anatoly Yagola
Optical coating technology is one of the key modern technologies with products turnover counted in billions of dollars. Thin film optical coatings surround us in our everyday life as elements of ophthalmology lenses, smartphones, photo cameras, various displays, protective structures of currency bills, etc. [1,2]. They are used as essential elements of all lasers, medical instrumentation, various sensors, lenses for laser lithography, advanced optical and X-ray telescopes and so on. In recent years, tremendous progress has been achieved both in development of new deposition techniques used for the production of optical coatings [2] and in development of mathematical methods used for solving inverse problems of designing optical coatings with required spectral properties [3].
Effect of point defects on the STE luminescence of CaF2 single crystals
Published in Radiation Effects and Defects in Solids, 2023
A. Batool, M. Izerrouken, M. V. Sorokin, S. O. Aisida, M. Mushtaq, Ja. Hussain, I. Ahmad, M. Q. A. Malik, A. Faridi, Ting-kai Zhao
Due to their mechanical and optical properties, as well as the radiation resistance, pure crystals of calcium fluoride have various applications in optical coating (1), laser technics (2), high-transmission windows for deep-UV (3–5), optical windows for fusion reactors (6), and microelectronic insulator and semiconductor devices (7). CaF2 crystals are also used in radiation detectors and dosimetry (8, 9).