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
Memristive junction with intrinsic rectifier
Receiving security risk feedback from linked contacts due to a user's system actions and behaviors
System and method for predicting remaining useful life of device components
System and method for netbackup data decryption in a high latency low bandwidth environment
Gathering user feedback in web applications
Floribunda rose plant named `KORamflusa`
Verifiable service policy implementation for intermediate networking devices
  Randomly Featured Patents
Process for removal of carbon dioxide from industrial gases
Method and system for a secure power management scheme
Clock tree layout method for semiconductor integrated circuit
Device for sealing a space
Vibration damped hand held rotary grinding machine
Device for leveling a mower deck
Conceptual network generating system, conceptual network generating method, and program product therefor
Apparatus for pulling arrows from surfaces in which they are embedded
VCC control inside data register of memory device
Processes for the scrubbing of exhaust gas streams