3-5μm BBAR Coated, Optics Silicon (Si) Window

Description

Product Specification:

• Bevel: Protective as needed
• Clear Aperture CA (mm): 10.79
• Clear Aperture (%): 85
• Thickness (mm): 1.00 ±0.13
• Diameter (mm): 12.70 +0.00/-0.13
• Coating Specification:
  • R_avg <0.5% @ 3-5µm
  • R_abs <1.5% @ 3-5µm
• Coating: BBAR (3000-5000nm)
• Density (g/cm³): 2.33
• Index of Refraction n_d: 3.422 @ 5µm
• Coefficient of Thermal Expansion CTE (10⁻⁶/°C): 2.55
• Edges: Fine Ground
• Knoop Hardness (kg/mm²): 1150
• Parallelism (arcmin): <3
• Poisson’s Ratio: 0.265
• Substrate: Silicon (Si)
• Surface Flatness (P-V): 2λ
• Surface Quality: 40-20
• Type: Protective Window
• Wavelength Range (nm): 3000 – 5000
• Young’s Modulus (GPa): 140
• Model Number: HDAR35-SI-W-12-1

For further assistance with customization or to place an order, please visit our online store or contact our sales team.

Material and Optical Properties:

1. Hardness and Durability:
   • Knoop Hardness: 1150, making it harder and less brittle compared to Germanium, providing better durability and resistance to mechanical damage.
2. Transmission Properties:
   • Broad Transmission: Effective transmission from 1.2 µm to 7 µm, covering both NIR and MWIR regions.
   • Enhanced Transmission: The HDAR coating significantly improves transmission in the 3 – 5 µm range and adds durability for use in harsh environments.
3. Mechanical and Physical Properties:
   • Density: Low density of 2.329 g/cm³, beneficial for weight-sensitive applications.
   • Durability: Suitable for use in environments where resistance to abrasion and mechanical stress is important.

Applications:

1. Infrared Imaging:
   • NIR Imaging: Ideal for near-infrared imaging applications, providing high transmission and clarity.
   • MWIR Imaging: Suitable for mid-wave infrared imaging, especially with the HDAR coating for enhanced performance.
2. Industrial Sensing:
   • Weight-Sensitive Sensors: Used in sensors and devices where minimizing weight is crucial, such as in portable or airborne systems.
   • Environmental Monitoring: Suitable for industrial and environmental monitoring applications where durability and transmission in the IR range are needed.
3. Aerospace and Defense:
   • Thermal Imaging: Utilized in thermal imaging systems for defense and surveillance that operate in the 3 – 5 µm range.
   • Weight-Sensitive Equipment: Ideal for aerospace applications where every gram counts, thanks to its low density.
4. Scientific Research:
   • Spectroscopy: Employed in spectroscopic applications that require broad IR transmission and durable optics.
   • Black Body Detection: Important for detecting sources radiating at a black body temperature of 700K.

SHAPE Optics Silicon (Si) Windows provide versatile and durable solutions for a range of infrared applications, particularly in the NIR and MWIR regions. Their low density makes them ideal for weight-sensitive applications, while the option for HDAR coating enhances their performance and durability in harsh environments. These windows are particularly suited for high-precision IR imaging, industrial sensing, and aerospace applications, offering reliable and robust optical performance.