USA As Represented by Secretary of the Navy

David J Griffiths

Blaise L Corbett

A process is provided for providing high contrast motion picture imagery. The camera system includes a physical architecture that enables multiple sensors to simultaneously acquire a visual scene without parallax or dissimilar exposures. The system architecture enables current off the shelf components to be used to develop the architecture or a specific sensor array to be developed. The architecture includes optical components that split an incident light ray into multiple beams of varying intensity. Each respective split light ray is then attenuated further with neutral density filters for the wavelengths to be observed before the light ray impacts the respective pixel sights. A process has been developed to use the camera system architecture to stochastically recombine the acquired energy and estimate what the original energy was before attenuation. The process involves the development of an optimal non recursive weighting function that can be used and constructed into a lookup table. The weighting function is used to minimize the error associated with symmetrically distributed error sources. A second filtering routine then takes place to remove the nonsymmetrical sources of error such as intraocular flare. This is accomplished by estimating the symmetric errors prior to acquisition and detecting when a sensors radiant exitance estimate does not fall within this symmetrical error bounds. The final reconstructed HDR image is formed once a pool of cameras is determined and a weighting average of the viable guesses is used to estimate the actual scene radiant exitance, or in a non-unitary sense, a photometric radiance. The HDR image can be saved as a high bit depth image or tone-mapped either by the method introduced or by other means and stored to memory via convention 8-bit encoding methods for storage.

Motion picture high dynamic range imaging

An electrical conduit ground assembly is provided for electrically and environmentally shielding an electric cable that inserts into a junction box via a through-hole. The assembly includes an adapter flange, first and second annular gaskets, first and second annular washers, a slip-ring, a ground adapter, first and second lock-nuts and a gland nut. The adapter flange has an internally threaded proximate end, an externally threaded mezzanine, a hexagonal seat, and an externally threaded distal end insertable into the through-hole. The first annular gasket inserts into the proximate end. The first and second washers insert into the proximate end. The annular ground adapter electrically connects the cable and the annular conduit between the first and second washers. The second annular gasket has an annular shaft and a circular brim. The gland nut screws into the proximate end of the adapter flange.

Junction box fitting for marine cables

An adapter is provided for electrically connecting an interior surface of a conduit and an external surface of a cable. The adapter includes a flat strip extending longitudinally from first to second ends with first and second transverse edges and composed of an electrically conductive and mechanically flexible material. The strip includes a longitudinal ribbon that forms a ring for wrapping around the cable by curling the first and second ends together in a direction transverse to the sheet, and a plurality of first and second incisions from the transverse edges towards the ribbon, the incisions being disposed at respective intervals that correspond to a longitudinally regular pattern. The first incisions form tapering tabs for bending in the direction transverse to the sheet to produce petals that extend radially inward from the ring to engage the cable. The second incisions form peripheral tabs for bending in an opposite direction transverse to the sheet to produce flanges that extend radially outward from the ring to engage the conduit.

Universal ground adapter for marine cables

An electrical conduit ground device is provided for electrically and environmentally shielding an electric cable. The device includes a conduit having a receiving end through which the cable passes axially; an internal seal that inserts into the receiving end; a gland boss that inserts into the receiving end; an external seal that inserts into the boss and extends axially outward from the receiving end; and a grounding assembly disposed between the internal and external seals. The assembly includes an adapter for providing electrical grounding contact between the cable and the swage tube; a space-retainer for structurally supporting the adapter; and a washer for axially separating the internal and external seals. The adapter is provided for electrically connecting an interior surface of a conduit and an external surface of a cable. The adapter includes an electrically conductive and mechanically flexible sheet having first and second edges that can face each other, the sheet being configured to form an annulus that mechanically contacts the external surface of the cable and a periphery that mechanically contacts the inner surface of the conduit.

Growing community of inventors

King George, VA, United States of America

David J Griffiths