Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1978-11-27
1980-09-30
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358210, 358229, 427 51, 352242, H04N 718, H04N 530, G03G 504
Patent
active
042258812
ABSTRACT:
A surveillance system for use in apartment buildings, department stores, and the like, wherein one or more fixed scanning, pan, tilt, zoom, and/or programmed cameras are housed within a solid reflective member or globe. The globe is internally coated with a transparent nichrome layer that bonds a layer of highly reflective metal, such as silver, to the globe. A layer of SiO is, in turn, deposited on the silver layer to protect the silver layer and to control the spectral response of the globe. The SiO layer is protected by a plastic coating. Either the plastic coating or the SiO layer is coated with a material, such as black paint, to absorb reflections within the globe. A camera having a lens and a masking disc is positioned within the globe. A portion of the interior, not coated with black paint, defines a window for the lens. Also, disclosed is a process for uniformally metalizing the interior surface of the spherical globe. The process includes rotating the globe within a vacuum chamber while the nichrome, silver, and SiO layers are sequentially deposited on the interior of the globe by vaporization of material positioned on three heating filaments positioned inside the globe. Subsequent to the deposition of the layers by vaporization, the vacuum is released and the plastic and paint coatings are applied to the interior of the globe. Several times during the process, the globe is heated in an oven to vaporize solvents and expedite the process.
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Coles Edward L.
Griffin Robert L.
Murray Tovi Designs, Inc.
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