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
Computer system and volume migration control method using the same
Processing autocomplete suggestions
Method and apparatus for wireless communication in a mesh network with central control of communication relationships
Reserving a time block in a calendar application to account for a travel time between geographic locations of appointments
Determination and presentation of package pricing offers in response to customer interest in a product
Fixing apparatus
Tray for microwave cooking and folding of a food product
  Randomly Featured Patents
Carriage shift assembly for disc driving device
Azo dispersing agents and azo pigment compositions
Photographic camera
Rolled paper holder
Method and device for producing a tube in a tube plate
Semiconductor memory device
Power steering system/servo control
Automobile controller
Intelligent optical network element
Optimized image processing for wavefront coded imaging systems