Volume 4 Issue 4
Aug.  2011
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LI Na, WANG Hong. Design of modulation disk for laser-beam riding guided sighting instrument[J]. Chinese Optics, 2011, 4(4): 423-428.
Citation: LI Na, WANG Hong. Design of modulation disk for laser-beam riding guided sighting instrument[J]. Chinese Optics, 2011, 4(4): 423-428.

Design of modulation disk for laser-beam riding guided sighting instrument

  • Received Date: 21 May 2011
  • Rev Recd Date: 23 Jul 2011
  • Publish Date: 25 Aug 2011
  • The spatial encoding principle of the modulation disk in a laser-beam riding guided sighting instrument is introduced. The design procedure of the modulation disk is described, and a single disk is selected to reduce the volume and weight of the guided sighting instrument. By considering every influencing factor of guided sighting instrument, the width, start-stop positions of inner and outer code paths and five kinds of frequencies are designed. The principle of defining deviation information, modulation coefficient characterizing the position information of a missile and the method of computing frequency are given. To avoid error codes of two fields' alternation, the design method to change angles is presented to rotate every frequency pattern 45 along the radial of the modulation disk. Experiments show that the method ensures the field cycle of 5 ms, and improve the guided precision.

     

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