Optical scanning device
Missile tracking and guidance system
Tracking and sighting instrument
Two tone tracker Patent #: 4202515
ApplicationNo. 06/220594 filed on 12/29/1980
US Classes:244/3.11Remote control
ExaminersPrimary: Jordan, Charles T.
Attorney, Agent or Firm
International ClassesG01S 3/78 (20060101)
G01S 3/789 (20060101)
F41G 7/30 (20060101)
F41G 7/20 (20060101)
F41G 7/32 (20060101)
Foreign Application Priority Data1979-09-12 FR
AbstractA scanning infrared beam is split into two subbeams. The first and second subbeams contain radiation of wavelengths situated in a first and second subband of the infrared wavelength band of the beam. For each subbeam there is provided a separate radiation-sensitive detector. The output signals of the detectors are applied to a subtractor circuit, whose output signal indicates the presence of a hot point.