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Anti-Reflection Coated Germanium Windows

Anti-Reflection Coated Germanium Windows

Germanium Windows Anti-Reflection Coated

Stock Specification

We supply a wide range of anti-reflection coated germanium windows in a variety of shapes and sizes, both off the shelf and custom-made for your exact requirements.
Germanium (Ge) is a hard, high-density, IR transmitting material that blocks UV (ultraviolet) and VIS (visible) wavelengths but allows IR from 2µm. Germanium has the highest  RI (refractive index) of commonly available IR-transmitters and has low optical dispersion.
Germanium transmits over 45% between 2-14μm up to 45⁰C, but transmission degrades slowly at 100⁰C then more rapidly above 200⁰C. Exposure to higher temperatures can lead to catastrophic failure in the material so Germanium is not suited for use in these conditions.  Where weight is an issue, its relatively high density (5.327gm/cc) should be considered .
Typical applications for Germanium include thermal imaging where the material can be used as a front optic while its index of refraction makes Germanium useful for wide-angle lenses and microscopes. Additionally, Germanium components can be used for FLIR (Forward Looking Infrared) and FTIR (Fourier Transformed Infrared) spectroscopy systems, alongside other analytical instruments.

Our stock  Germanium windows are available for worldwide shipping today .Please contact our sales team for advice and to help you select the best windows for your application. 

Our stock windows include 50mm x 3mm AR DLC coated Germanium Windows, 75mm x 3mm AR DLC coated Germanium Windows and 100mm x 6mm AR DLC coated Germanium Windows.  See below for full specifications and details on how to order.

Specific coatings applied to stock items are listed below 

Custom coatings for Germanium windows available on request

 

 

MATERIAL
GERMANIUM OPTICAL GRADE MONO CRYSTALLINE
 
DIAMETER TOLERANCE
+ 0.00 / - 0.1mm
THICKNESS TOLERANCE
 ± 0.1mm
 
EDGES
 Fine ground
SURFACE QUALITY
 60/40
 
FLATNESS
 ≤ 5 fringes
PARALLELISM
  ≤ 3 arc mins
 
COATINGS
 See below

 

CUSTOM MADE SIZES
 
DIMENSIONS
DIAMETER 5mm TO 300mm / SQUARES, RECTANGLES OR CUSTOM SHAPES ON REQUEST
THICKNESS
0.5mm TO 20mm 
PART NO. QTY BASKET QUOTE Description Diameter (MM)Thickness (MM)Specification Unit Price Data
Sheet
GE008-1-AR/ARgermanium window8.01.0ar/ar coated 3-5 micron£32.00
ge009-1-ar/dlcgermanium window9.41.0ar/dlc coated 7 - 14 micron£33.40
ge010-1-AR/ARgermanium window10.01.0ar/ar coated 7 - 14 micron£39.00
ge010-1-AR/DLCgermanium window10.01.0ar/dlc coated 3 - 5 micron£39.00
ge010-2-AR/DLCgermanium window10.02.0ar/dlc coated 3 - 5 micron£46.00
GE012-0.75-AR/DLCGERMANIUM WINDOW12.70.75ar/dlc coated 7 - 14 micron£39.20
ge012-1-ar/dlcgermanium window12.71.0ar/dlc coated 7 - 14 micron£49.00pdf
ge019-1-AR/DLCgermanium window19.01.0ar/dlc coated 3-5 & 8-12 MIcrON£48.00
GE025-3-AR/DLCgermanium window25.03.0ar/dlc coated 7 - 14 micron£110.00pdf
GE032-3-AR/DLCGERMANIUM WINDOW32.03.0ar/dlc coated 7 - 14 micron£172.00
ge040-2-AR/DLCgermanium window40.02.0ar/dlc coated 7 - 14 micron£167.00pdf
GE050-3-AR/DLCgermanium window50.03.0ar/dlc coated 7 - 14 micron£230.00pdf
GE075-3-AR/DLCgermanium window75.03.0ar/dlc coated 7 - 14 micron£440.00pdf
GE100-6-AR/DLCgermanium window100.06.0ar/dlc coated 7 - 14 micron£979.00pdf