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Description

Monocrystalline silicon biconcave lens are precision optical components featuring two concave spherical surfaces, crafted from high-purity monocrystalline silicon—a material renowned for exceptional transmission in the infrared (IR) spectrum (1.2–8 μm). Designed to diverge collimated light beams or expand optical paths, these lenses are manufactured with advanced grinding and polishing techniques to ensure tight dimensional tolerances, superior surface quality, and minimal optical distortion. Ideal for IR imaging, laser systems, and thermal sensing applications, our monocrystalline silicon lens can be customized in size (diameters from 5 mm to 100 mm), curvature, and coatings to meet specific system requirements, balancing high optical performance with mechanical durability for harsh environments.

Optical Monocrystalline Silicon Si Biconcave Lens

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Specifications

Lens Type: Bi-Concave
Material: Si
Diameter: 12.7 mm
Focal Length: -15 mm
Edge Thickness, Te: 2 mm
Diameter Tolerance: +0/-0.1mm
Thickness Tolerance: ±0.1mm
Surface Quality: 60-40 Scratch-dig
Surface Accuracy: 1/4 lambda
Coating: Custom
Concentricity: <3 arcmin
Bevel: <0.35mm

Got questions about specs? Use the inquiry form to ask.

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Features

  • Material: Made of high-purity silicon, providing excellent infrared transmission.
  • Optical Properties: High refractive index (~3.4 at 3 µm) enables effective beam divergence.
  • Surface Design: Features two inwardly curved surfaces for controlled light dispersion.
  • Infrared Compatibility: Performs well in the IR spectrum (1.2 µm - 7 µm), making it ideal for thermal imaging.
  • Lightweight: Silicon’s low density allows for compact and lightweight optical system designs.
  • Anti-Reflective Coatings: Often coated to minimize surface reflections and enhance transmission.

Applications

  • Laser Optics: Used to expand and shape laser beams in optical setups.
  • Infrared Imaging: Essential for thermal imaging systems in security and medical applications.
  • Spectroscopy: Applied in IR spectroscopy for precise light control and measurement.
  • Optical Corrections: Helps correct optical aberrations in complex optical systems.
  • Defense and Aerospace: Utilized in infrared guidance systems and aerospace optical technologies.

Frequently Asked Questions

As a factory with in-house monocrystalline silicon production, what customization options do you offer for silicon biconcave lens?
We provide end-to-end customization: from monocrystalline silicon material grade selection to lens parameters—diameters (5–100 mm), focal lengths (-5 mm to -500 mm), edge thicknesses (1–20 mm), and surface profiles (spherical, aspherical optional). We also tailor coatings ((AR for 3–5 μm/8–12 μm).
What coatings are recommended for silicon biconcave lenses in IR systems?
Broadband AR coatings (e.g., 3–5 μm or 8–12 μm) are most common, reducing surface reflections to
Since you produce your own monocrystalline silicon, how does this ensure quality and lead time for custom biconcave lens?
Our in-house silicon production allows strict control over material purity (≥99.999999999% ) and optical homogeneity, eliminating supply chain delays from external material suppliers. Each batch undergoes spectral transmittance and surface quality testing before fabrication, ensuring consistent performance.

Got more questions? Use the inquiry form to ask the supplier directly.

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