Track counter for optical disk

Abstract From the Canadian patent

A track counter for counting the number of tracks a light beam traverses when an optical head moves over an optical disk in the radial direction, comprises apassage signal generating circuit employing a reflection of said light beam from said optical disk, for detecting that the light beam has traversed a track and for releasing a passage signal on that occasion, a counter for counting the passage signals released by the signal generating circuit a count, suspending circuit for forecasting that the light beam will traverse a specific position of a track and for suspending the count of aforementioned counter during this forecast period, and a count value compensating circuit for calculating, …