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<sub>avg</sub> <0.5% @ 3-5µm
- R<sub>abs</sub> <1.5% @ 3-5µm
- Coating: BBAR (3000-5000nm)
- Density (g/cm³): 2.33
- Index of Refraction n<sub>d</sub>: 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
Material and Optical Properties
- Hardness and Durability:
- Knoop Hardness: 1150, making it harder and less brittle compared to Germanium, providing better durability and resistance to mechanical damage.
- 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.
- 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
- 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.
- 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.
- 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.
- 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.
