eo_logo
 
Product added to cart
All Products / Optics / Windows and Diffusers / UV and IR Windows / ISP Optics Germanium (Ge) Windows
See all 5 Products in Family

38.1mm Dia., 3mm Thick, 8-12μm AR Coated & DLC Coated, ISP Optics Germanium (Ge) Window | DLC812-GE-W-38-3

See More by ISP Optics

×
Stock #24-578 In Stock
×
Quantity Selector - Use the plus and minus buttons to adjust the quantity. +
C$1,101.80
Qty 1+
C$1,101.80
Volume Pricing
Request Quote
Product Downloads

Specifications

General

Type:
Protective Window
Model Number:
DLC812-GE-W-38-3

Physical & Mechanical Properties

Bevel:
Protective as needed
Clear Aperture (%):
85
Clear Aperture CA (mm):
32.38
Diameter (mm):
38.10 +0.00/-0.13
Thickness (mm):
3.00 ±0.13
Edges:
Fine Ground
Knoop Hardness (kg/mm2):
780
Parallelism (arcmin):
<3
Poisson's Ratio:
0.28
Young's Modulus (GPa):
102.7

Optical Properties

Coating:
S1: DLC Coating
S2: BBAR (8000-12000nm)
Coating Specification:
Tavg ≥90.0% @ 8 - 12μm
Tmin ≥80.0% @ 8 - 12μm
Index of Refraction (nd):
4.002 @ 11µm
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Germanium (Ge)
Surface Flatness (P-V):
λ/10 @ 10.6μm
Surface Quality:
40-20
Wavelength Range (nm):
2000 - 14000
Coating Temperature (°F):
AR: -80 to +160 per MIL-C-48497C<br/>DLC: -80 to +160 per MIL-C-48497C

Material Properties

Coefficient of Thermal Expansion CTE (10-6/°C):
6.1
Density (g/cm3):
5.33

Environmental & Durability Factors

Coating Abrasion:
AR: Moderate, per MIL-C-48497C<br/>DLC: Severe, per MIL-C-48497C
Coating Adhesion:
AR: per MIL-C-48497C<br/>DLC: per MIL-C-48497C
Coating Humidity:
AR: 24 Hours per MIL-C-48497C<BR/>DLC: 24 Hours per MIL-C-48497C
Coating Salt Solubility:
AR: N/A<br/>DLC: ≥24 Hours Immersion per MIL-C-675C
Coating Salt Spray:
AR: N/A<br/> DLC: ≥72 Hours per MIL-C-675
Coating Solubility and Cleaning:
AR: per MIL-C-48497<br/>DLC: per MIL-C-48497
Coating Wiper Durability:
AR: N/A<br/>DLC: ≥1,000 Wipes of Sand/Slurry per TS-1888

Regulatory Compliance

RoHS 2015:
Compliant
×
Certificate of Conformance:
View
×
Reach 240:
Compliant
×

Product Details

  • Minimal Chromatic Aberration Due to Low Dispersion
  • Uncoated Transmission from 2 – 16µm
  • Available with BBAR or DLC Coating for 8 – 12µm
  • 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.

ISP Optics Germanium (Ge) Windows provide transmission and low absorption through the Long-Wave Infrared (LWIR) spectrum, making it useful for thermal imaging applications. Germanium features a Knoop Hardness of 780, making it ideal for infrared applications requiring rugged optics. These windows are available uncoated, Broadband Anti-Reflection (BBAR) coated for 8 – 12µm, or Diamond-Like Carbon (DLC) coated for 8 – 12µm. ISP Optics Germanium Windows are ideal for integration into thermal imaging systems, especially those that require rugged optics. Germanium is subject to thermal runaway, meaning that the transmission decreases as temperature increases. As such, these germanium windows should be used at temperatures below 100°C.

Related Products

Frequently Purchased Together