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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

75mm Dia. x 5mm Thick, 8-12μm AR Coated & DLC Coated, Ge Window

TECHSPEC® Diamond-Like Carbon (DLC) Coated Germanium Windows

TECHSPEC® Diamond-Like Carbon (DLC) Coated Germanium Windows

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Stock #13-799 3-5 days
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S$4,234.00
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S$4,234.00
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Specifications

General

Type:
Protective Window
Note:
Arrow on substrate edge points towards DLC coated surface

Physical & Mechanical Properties

Bevel:
Protective as needed
Clear Aperture (%):
90
Clear Aperture CA (mm):
67.50
Diameter (mm):
75.00 +0.0/-0.1
Thickness (mm):
5.00 ±0.1
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
780
Parallelism (arcmin):
<1

Optical Properties

Coating:
S1: DLC Coating
S2: BBAR (8000-12000nm)
Coating Specification:
AR: Ravg ≤0.5% @ 8000 - 12000nm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Surface Quality:
60-40
Wavelength Range (nm):
8000 - 12000
Coating Temperature (°F):
AR: -80 to +160 per MIL-C-48497A Paragraph 4.5.4.1
DLC: -80 to +160 per MIL-M-13508C Paragraph 4.4.4

Environmental & Durability Factors

Coating Abrasion:
AR: Moderate, per MIL-C-48497A Paragraph 4.5.3.3
DLC: Severe, per MIL-C-675C Paragraph 4.5.10
Coating Adhesion:
AR: per MIL-C-48497A Paragraph 4.5.3.1
DLC: per MIL-M-13508C Paragraph 4.4.6
Coating Humidity:
AR: per MIL-C-48497A Paragraph 4.5.3.2
DLC: ≥24 Hours per MIL-C-675C paragraph 4.5.8
Coating Salt Solubility:
AR: N/A
DLC: ≥24 Hours Immersion per MIL-C-675C paragraph 4.5.7
Coating Salt Spray:
AR: N/A
≥24 Hours per MIL-C-675C paragraph 4.5.9
Coating Solubility and Cleaning:
AR: per MIL-C-48497A Paragraph 4.5.4.2
DLC: N/A
Coating Wiper Durability:
AR: N/A
DLC: ≥5,000 Wipes of Sand/Slurry per TS-1888

Regulatory Compliance

RoHS 2015:
Certificate of Conformance:
Reach 235:

Product Details

  • Meets Severe Abrasion Requirements of MIL-C-675C
  • ≥90% Transmission from 8 - 11.5µm
  • Ideal for Harsh Environments
  • Uncoated, 3-5 Micron BBAR, and 8 - 12 Micron BBAR Coated Germanium Windows are also Available
  • Due to material supply chain disruptions with germanium, there may be increased lead times and price changes on our germanium products. For more information, please contact our customer service team.
  • Edmund Optics has limited remaining inventory of this part number and no raw material available to supply more once this is depleted.  Please contact our Product Support Engineers to help with an alternate solution for your needs. Customer Service can provide you the latest price and availability.

TECHSPEC® Diamond-Like Carbon (DLC) Coated Germanium Windows have been designed with durability in mind. Featuring a high efficiency broadband anti-reflection coating on one surface and a specially designed DLC coating on the other surface, these windows feature excellent transmission and environmental resistance. The DLC coated surface is designed to withstand temperature cycling from -80 to +160°F, salt spray for a continuous period of 24 hours, salt solubility for an immersion period of 24 hours, and 5,000 wiper oscillations in a sand and slurry mixture. Further, TECHSPEC DLC Coated Germanium Windows meet the MIL-C-675C requirements for severe abrasion.

Technical Information

Coating Specifications
Specification AR Coating DLC Coating
Adhesion per MIL-C-48497A Paragraph 4.5.3.1 per MIL-M-13508C Paragraph 4.4.6
Abrasion Moderate, per MIL-C-48497A Paragraph 4.5.3.3 Severe, per MIL-C-675C Paragraph 4.5.10
Humidity per MIL-C-48497A Paragraph 4.5.3.2 ≥24 Hours per MIL-C-675C paragraph 4.5.8
Salt Solubility - ≥24 Hours Immersion per MIL-C-675C paragraph 4.5.7
Salt Spray - ≥24 Hours per MIL-C-675C paragraph 4.5.9
Temperature (°F) -80 to +160 per MIL-C-48497A Paragraph 4.5.4.1 -80 to +160 per MIL-C-48497A Paragraph 4.5.4.1
Solubility and Cleaning per MIL-C-48497A Paragraph 4.5.4.2 -
Water Solubility 24 Hours, per MIL-C-48497A Paragraph 4.5.5.3 -
Wiper - ≥5,000 Wipes of Sand/Slurry per TS-1888

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