Hermetic Window Housing Assemblies

Window Housing Assemblies for Cooled Infrared Detectors

Materion Balzers Optics can supply infrared windows hermetically soldered into metal housings. These window housing assemblies are suitable for soldering or welding onto the customer’s cooled infrared detector. Materion can manufacture the infrared window with AR or filter coatings, metallize the window for solder assembly, and then solder the window into metal housing. The integrity of the solder joint is rigorously measured by X-ray, helium leak checking and environmental testing.

Benefits

Low void solder joint
Highly reliable hermetic seal
X-ray and helium leak testing
High transmittance window in SWIR, MWIR or LWIR

Applications

Hermetic window housing assemblies are required for cooled infrared dectors in the SWIR, MWIR and LWIR. The window can be specified with a variety of coatings, including AR, longpass filter, or narrow band filter. Cooled IR detectors are used for high precision, high sensitivity measurements and imaging, such as temperature measurement, gas sensing and measurement, night vision and multispectral imaging.

Technical Data

Available Solders Pb-containing or Pb-free
Liquidus from 118 °C to 361 °C

Housing Metal Alloy 42, Kovar, Invar
depending on the window

Housing plating Available upon request

Window Sapphire, Si or Ge

Available Coatings Antireflection, Long Pass,
Narrow Band Filters

Window Dimensions Ø 6 mm to Ø75 mm

Helium leak rate < 1E-9 std atm-cc/sec

Temperature cycle compatibility –50°C to + 90°C

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