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Infrared Silicon Lenses AR Coated

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January 21, 2026
Category Connection: Sapphire Optical Windows
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#sapphire crystal glass #optical window glass #sapphire glass window
Brief: This video provides a guided demonstration of high-performance silicon lenses with IR anti-reflection coating. You will see how these optical components are engineered for MWIR applications, learn about their key infrared properties, and discover how the specialized AR coating enhances transmission efficiency in thermal imaging and industrial inspection systems.
Related Product Features:
  • Optical-grade single crystal silicon material for high performance in the 1.2-8 μm transmission range.
  • IR anti-reflection coating significantly reduces surface reflection losses and increases transmission efficiency.
  • Excellent thermal stability with operating temperature range from -40°C to +200°C.
  • High mechanical strength and durability suitable for harsh industrial environments.
  • Available in various lens types including plano-convex, bi-convex, plano-concave, and bi-concave.
  • Customizable coating designs for specific wavelength bands including MWIR (3-5 μm) and LWIR (8-12 μm).
  • High-precision optical polishing with surface figure ≤ λ/10 @ 3.39 μm and excellent surface quality.
  • Wide applications in thermal imaging, infrared sensing, spectroscopy, and industrial inspection systems.
FAQs:
  • What wavelength range is silicon suitable for in infrared applications?
    Silicon lenses offer good infrared transmission in the 1.2-8 μm wavelength range and are most commonly used in the 3-5 μm (MWIR) band. Silicon is not recommended for visible or near-visible applications due to its low transmission in those regions.
  • Why is IR anti-reflection coating necessary for silicon lenses?
    Silicon has a relatively high refractive index, which causes significant surface reflection on uncoated lenses. IR anti-reflection coating reduces these reflection losses, increases total transmission, and improves image contrast and signal-to-noise ratio in infrared optical systems.
  • What infrared wavelength bands can the AR coating be designed for?
    The IR AR coating can be optimized for different wavelength ranges, including 3-5 μm (MWIR), 8-12 μm (LWIR), and custom infrared wavelength bands upon request. Coating performance can be tailored to specific system requirements.
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