Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Method and systems for detecting duplicate travel path
Avirulent oncolytic herpes simplex virus strains engineered to counter the innate host response
Processing financial documents
High-frequency power amplifier
Radiation-curable ink composition, ink jet recording method, and recorded matter
Reflective mask blank and method of manufacturing a reflective mask
Incentive based recommendation method for mobile station content
  Randomly Featured Patents
Noninvasive blood pressure monitoring system
Solar energy collector
Protective headgear for use with hooded dryers
Fiberoptic cable suspension bracket
Pin for insertion into a receiving opening in a printed circuit board and method for inserting a pin into a receiving opening in a printed circuit board
Frier incorporating filtering mechanism
Heat activated heat pump
Tool handle
Interconnect fault detector for LSI logic chips
Deodorizer container