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AT Optical Co., Ltd.
AT Optical Co., Ltd.

‌ Optical materials ‌refers to the general term of materials with certain optical properties and functions used in optical experiments and optical instruments. These materials play a key role in optical systems, being able to transmit, alter or control the propagation of light. The main types of optical materials include optical glass, optical crystal and so on.

Types of Optical Material

  • Visible Glass

    Visible Glass

    Visible Glass
    Optical glass ‌ is one of the most commonly used materials in optical design. It has a high degree of transparency, chemical stability and a high degree of uniformity in physics. Optical glass can be divided into silicate glass, borate glass and phosphate glass according to the main composition.
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  • Ultraviolet Glass

    Ultraviolet Glass

    Ultraviolet Glass
    Ultraviolet glass ‌ is a kind of optical glass with high ultraviolet transmittance and low ultraviolet absorption. It is mainly used as window material of spectrometer, ultraviolet lens, optical filter, etc. It has short ultraviolet cut-off wavelength and high transmittance, and is commonly used in spectrometers, excimer laser optical systems, high energy laser systems, fiber optics and space.
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  • Infrared Material

    Infrared Material

    Infrared Material
    Infrared optical material ‌refers to the materials specially used for processing or transmitting infrared light. It has excellent optical and mechanical properties and is widely used in infrared lasers, infrared sensors and other optical devices. Infrared optical materials have different transmittance in different bands, usually divided into near infrared (nir, 0.7um~2.5um), mid-infrared (mir, 2.5um~25um) and far infrared (fir, 25um~1000um) according to wavelength
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The main properties of optical materials

  • Optical Performance: Refractive index controls light bending; materials like high-index glass provide precision optics. Dispersion varies (flint glass has high dispersion, crown glass low). Transparency across wavelengths is vital (e.g., UV-grade fused silica for UV, N-BK7 for visible light).

  • Physicochemical Properties: Homogeneity ensures consistent refractive indices. Chemical stability (e.g., phosphate glass resists acids) and hardness (e.g., alumina, Mohs 9) improve durability.

  • Thermal Behavior: Low thermal expansion (e.g., alumina) ensures stability in high temperatures. Thermal shock resistance is crucial for aerospace sensors.

  • Processability & Cost: Machinability varies; engineering plastics are easy to mold but heat-sensitive, while synthetic crystals allow tailored growth. Sputtering efficiency affects costs.

  • Functional Traits: Birefringence in non-cubic crystals supports polarization. High-purity alumina is ideal for 5G RF devices.


The main properties of optical materials

Applications of Optical Components

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