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  • LWIR Bandpass Filters

Photonics Spectra
May 2010
Deposition Sciences Inc. (DSI)Request Info
Deposition Sciences Inc. provides long-wavelength infrared (LWIR) bandpass filters that operate at temperatures between ambient and 10 K. The thin-film coatings are manufactured via proprietary physical vapor deposition with the ion-assist process, making them durable and robust. They feature precise band edge placement for critical sensing applications. The filters are suitable for use in imaging sensor filters, order-sorting filters, thermal and/or night vision tasks, and forward-looking infrared optics. Substrates including germanium, silicon, zinc sulfide, zinc selenide, quartz, sapphire and polymers are available, depending upon the customer’s wavelength requirements. Multispectral filters can be provided when multiple filters are needed on a single substrate. Sizes from a few millimeters to >50.8 mm in diameter can be provided.


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The range of frequencies that will pass through a filter or other device. Synonymous with passband.
1. With respect to radiation, a device used to attenuate particular wavelengths or frequencies while passing others with relatively no change. 2. See digital filter.
A crystalline semiconductor material that transmits in the infrared.
Pertaining to optics and the phenomena of light.
A material whose molecular structure consists of long chains made up by the repetition of many (usually thousands) of similar groups of atoms.
See crystal quartz; fused quartz.
thin film
A thin layer of a substance deposited on an insulating base in a vacuum by a microelectronic process. Thin films are most commonly used for antireflection, achromatic beamsplitters, color filters, narrow passband filters, semitransparent mirrors, heat control filters, high reflectivity mirrors, polarizers and reflection filters.
zinc sulfide
A polycrystalline material that transmits in the infrared; it is used as a phosphor in x-ray and television screens.
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