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 5 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
Polyolefin and composition for pipe systems and sheets
Stool
Display apparatus
Multiple secure elements in mobile electronic device with near field communication capability
Plants and seeds of hybrid corn variety CH260114
Dynamic report mapping apparatus to physical data source when creating report definitions for information technology service management reporting for peruse of report definition transparency a
Nonaqueous secondary battery with nitrile group-containing compound
  Randomly Featured Patents
Electrodipping device
Reciprocating heat engine
Plasma torch and an apparatus for producing fused silica using plasma arc electrodes
Photographing apparatus and photographing method
Method of stepless capacity control of a reciprocating piston compressor and piston compressor with such control
Method of and apparatus for injecting treating-liquid into wood material and porous inorganic material, and method for destroying ray parenchyma cell walls and aspirated pit pair
Method of making large area conformable shape structures for detector/sensor applications using glass drawing technique and postprocessing
Side indicator hangers and method and apparatus for removing indicators from hangers
Long latency interface protocol
Tap head for beverage containers or barrels