×

Synchronizing signal generator

  • US 4,139,257 A
  • Filed: 09/22/1977
  • Issued: 02/13/1979
  • Est. Priority Date: 09/28/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. A synchronizing signal generator comprising:

  • a light source means emitting a modulated light beam used for scanning;

    a deflector for deflecting said modulated light beam in a predetermined direction;

    a beam splitter consisting of a first diffraction grating which diffracts a portion of said modulated light beam deflected by said deflector and a base carrying thereon said diffraction grating;

    a photodetector;

    means for deriving a scan synchronizing signal from a synchronizing signal beam which is a portion of said diffracted beam; and

    means for feeding scan signals synchronized with said synchronizing signal into said light source means.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×