Method and apparatus for controlling the intensity of a laser ouput beam

Patent · Tue Oct 24 00:00:00 EDT 1978

OSTI ID:6444134

Marlett, C J; Reed, E A; Johnson, R C

The output beam of a laser tube is modulated between a maximum intensity (lase) and minimum (no-lase) intensity levels by varying the laser tube current between corresponding values. The device for controlling the output beam comprises a single transistor provided in the current path of the laser tube, the current therethrough being controlled, or modulated, to provide the modulated laser beam. The device is capable of operating in a plurality of modes. In the preferred mode, an analog signal is coupled to the transistor control circurity whereby the laser beam intensity is linearly modulated between the maximum and minimum levels to provide a laser beam having grey scale capabilities.

• Assignee: Xeron Corp.
• Patent Number(s): US 4122409
• OSTI ID: 6444134
• Resource Relation: Patent File Date: Filed date 10 Mar 1976
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
LASERS
MODULATION
DESIGN
420300* - Engineering- Lasers- (-1989)