Optical windows and lens caps define how light enters or exits a hermetic package. Material (sapphire, borosilicate, molded lens), coating (AR band), and standoff height must match your wavelength and power density.
Pair with die-level thermal — laser submount catalog, datacom submounts, or order SiC/ALN samples.
Match window diameter to your beam clearance. AR coating band must cover operating wavelength with margin. For high-power emitters, confirm window thickness and material absorption before finalizing the cap.
7 outlines in catalog
Optical window or lens cap element — 30×29 mm Cap Housing.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-18 Cap Housing.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-39 6.1H 635 nm Ball Lens Window.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-46 Water-Drop Ball Lens.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-46 Angled Window Cap.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-56 Aspheric Lens Cap.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical window or lens cap element — TO-56 Ball Lens Window.
Typical use: Hermetic packages that need a defined optical aperture — sapphire, AR-coated glass, or molded lens interfaces.
Why this line: Window material and coating drive transmission and reliability; specify wavelength and power density when ordering.
Optical windows & caps
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