Title:
【発明の名称】レーザパワー制御装置
Document Type and Number:
Japanese Patent JP2645177
Kind Code:
B2
Abstract:
A laser power control apparatus which comprises an exciting section for supplying a drive current to a laser oscillation device, a laser power controller (13) for generating current designating data which is incremented and decremented in a binary order, first and second digital/analog converters (25, 26) respectively assigned to lower digits and higher digits of the current designating data, for performing digital-to-analog conversion on the lower-digit data and the higher-digit data, a current setting section for setting a level for the drive current in accordance with the sum of output voltages of the first and second digital/analog converters (25, 26). In the apparatus, the current setting section has circuit constants which cause the ranges of the drive current for sequential two values of the higher-digit data to be overlapped with each other by a predetermined amount, and the laser power controller (13) has a circuit (14', 51, 52, 53, 54, 19) for limiting the range of the lower-digit data to compensate the overlap of the drive current ranges.
Inventors:
OKU JUNTARO
Application Number:
JP27648190A
Publication Date:
August 25, 1997
Filing Date:
October 17, 1990
Export Citation:
Assignee:
TETSUKU KK
International Classes:
B41J2/44; G03G15/04; H01S5/062; H04N1/113; H04N1/23; H04N1/40; H04N1/407; H01S5/06; (IPC1-7): H04N1/407; B41J2/44; H04N1/113
Domestic Patent References:
| JP2151455A |
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)