Resources Contact Us Home
Electro-optical detection system for reflection free underwater images from aircraft

Image Number 2 for United States Patent #5444441.

An electro-optical detection system for detecting objects 12 embedded within a partially transmitting medium comprises means 20 to receive electro-magnetic radiation in two close spectral channels 28, 212: a signal channel 212 where the wavelength and bandwidth of the signal channel are optimized to correspond to the peak of transmission of the medium and a reference channel 28 where the wavelength and bandwidth are selected to correspond to a spectral region where attenuation in the medium is high. The signal and reference channels are then subtracted (213) so as to remove the effect of reflected radiation from the signal channel 212. The signal is processed digitally (218) to provide an enhanced image of the field of view. In a particular arrangement for detecting objects underwater a CCD TV camera 20 is used with three separate CCD detector arrays providing concurrent red (R), green (G), blue (B) output signals. The green and blue signals are combined in an adjustable ratio to provide the image signal to match the prevailing conditions of the partially transmitting sea. A notch filter is employed to cut out light in a spectral band between the signal and reference channels.

  Recently Added Patents
Arbitration for memory device with commands
Semiconductor memory system having ECC circuit and controlling method thereof
Method and apparatus for belling plastic pipe
Method and apparatus for connecting signal lines of multiple layers to certain contacts while preventing connections with other contacts
System and methods for facilitating and documenting user thinking and learning using enhanced interactive constructs
Simultaneous wafer bonding and interconnect joining
Rear bumper for an automobile
  Randomly Featured Patents
Method for comminuting kidney stones
Loading device for modular propelling charges
Internet television device capable of selecting hot spots by the use operation buttons
Swim goggles
Process for aromatizing and/or filtering tobacco smoke, cigarette end piece for carrying out the process and use of this process
Crab cage and pole apparatus
Container closure
Integrated molded collar, filter bag, cage and locking ring assembly for baghouses
High voltage control devices
Method for making separations from aqueous solutions