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Infrared Reduction Filter

Photonics.com
Apr 2010
Deposition Sciences Inc. (DSI)Request Info
 
SANTA ROSA, Calif., April 12, 2010 — Deposition Sciences Inc. has announced an improved filter developed to reduce the infrared and transmit the visible wavelengths in camera applications. Because CMOS sensors are particularly sensitive to unwanted infrared wavelengths, the improved CMOS filter is designed to block up to 99.5% of the infrared radiation while transmitting more than 85% of the visible.

The optical thin-film coating can be applied to glass as thin as 0.076 mm, which can be used as an encapsulating cover glass for devices being flooded with damaging environmental infrared. The advancement in the filter significantly improves the signal-to-noise ratio in visible CMOS imaging systems that are subject to unwanted IR radiation.

It is suitable for use in camera applications where it is critical that IR radiation be blocked to reduce the effects of extraneous light and to improve clarity and contrast in the imagery.

Proprietary MicroDyn sputtering technology yields high-performance CMOS IR filters. The durable and uniform coating is stable over temperature and humidity changes.

For more information, visit: www.depsci.com


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GLOSSARY
contrast
The apparent difference in brightness between light and dark areas of an image. For a light target against a dark background, contrast is computed as follows: where Lt is the luminance of the target and Lb is the luminance of the background.
radiation
The emission and/or propagation of energy through space or through a medium in the form of either waves or corpuscular emission.
sputtering
A vacuum deposition method in which the coating material (target) is removed from the surface of the coating source (cathode) by ion bombardment and deposited upon the substrates.
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.
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