3-5μm AR Coated & DLC Coated, Optics Silicon (Si) Window

Product Specification:

• Bevel: Protective as needed
• Clear Aperture CA (mm): –
• Clear Aperture (%): 85
• Thickness (mm): -±0.13
• Diameter (mm): -+0.00/-0.13
• Coating Specification:
  • S1: DLC Coating
  • S2: BBAR (3000-5000nm)
• Edges: Fine Ground
• Knoop Hardness (kg/mm²): 1150
• Parallelism (arcmin): <3
• Substrate: Silicon (Si)
• Surface Flatness (P-V): λ/10 @ 10.6µm
• Surface Quality: 40-20
• Type: Protective Window
• Wavelength Range (nm): 3000 – 5000
• Coating Adhesion:
  • AR: per MIL-C-48497C
  • DLC: per MIL-C-48497C
• Coating Abrasion:
  • AR: Moderate, per MIL-C-48497C
  • DLC: Severe, per MIL-C-48497C
• Coating Humidity:
  • AR: 24 Hours per MIL-C-48497C
  • DLC: 24 Hours per MIL-C-48497C
• Coating Salt Solubility:
  • AR: N/A
  • DLC: ≥24 Hours Immersion per MIL-C-675C
• Coating Salt Spray:
  • AR: N/A
  • DLC: ≥72 Hours per MIL-C-675
• Coating Solubility and Cleaning:
  • AR: per MIL-C-48497
  • DLC: per MIL-C-48497
• Coating Temperature (°F):
  • AR: -80 to +160 per MIL-C-48497C
  • DLC: -80 to +160 per MIL-C-48497C
• Coating Wiper Durability:
  • AR: N/A
  • DLC: ≥1,000 Wipes of Sand/Slurry per TS-1888
• Note: Arrow on substrate edge points towards DLC coated surface
• Model Number: DLC35-SI-W-25-2

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

Material and Coating Characteristics:

1. Diamond-Like Carbon (DLC) Coating:
   • Anti-Reflection (AR) Coating: One surface is coated with an AR layer to minimize reflections and maximize transmission.
   • DLC Coating: The other surface features a specially designed DLC coating, providing exceptional durability and resistance to abrasion, temperature extremes, and chemical exposure.
2. Silicon Substrate:
   • Hardness: Silicon has a Knoop hardness of 1150, making it tougher and more durable than germanium substrates.
   • Low Density: Silicon’s low density makes these windows suitable for weight-sensitive applications.

Applications:

1. Infrared Defense:
   • Thermal Imaging: Essential for thermal imaging systems used in defense, providing clear IR transmission and durability in field conditions.
   • Surveillance: Suitable for use in surveillance equipment that operates in harsh environments.
2. Industrial Sensing:
   • Environmental Monitoring: Ideal for sensors deployed in harsh industrial settings where abrasion and chemical resistance are crucial.
   • Process Control: Used in process control applications requiring durable and reliable IR transmission components.
3. Aerospace and Aviation:
   • Optical Systems: Employed in aerospace and aviation optical systems that require robust performance in extreme conditions.
   • Weight-Sensitive Applications: The low density of silicon makes these windows suitable for applications where weight is a critical factor.

SHAPE Optics Diamond-Like Carbon (DLC) Coated Silicon Windows are designed for high performance in the mid-infrared range, particularly from 3 to 5 µm. Their exceptional durability, meeting military standards for severe abrasion, along with their ability to withstand harsh environmental conditions, makes them ideal for demanding applications in defense, industrial sensing, and aerospace. The combination of anti-reflection and DLC coatings ensures high transmission and robust protection, making these windows a reliable choice for critical infrared optical systems.