Optoelectronic device for acquiring images of planes, such as bar code symbols

An optoelectronic device for use in an imager, comprising:

• a clock that emits a transfer signal for each of a number of acquired images;
• a deflector;
• a driver coupled to oscillate or rotate the deflector;
• and
• a closed loop control circuit coupled to control the driver with a control signal that synchronizes the beginning of each scanning cycle of the deflector in phase and frequency with the transfer signal emitted by the clock.

An optoelectronic device for acquiring images, comprising:

• a lighting source for producing an incident beam;
• an electronic sensor for acquiring images;
• an optical component for forming images on the electronic sensor;
• a deflector rotatably mounted;
• a stepper motor coupled to the deflector to cyclically oscillate or rotate the deflector such that the incident beam describes, during each cycle, angular scanning that generates at least one elementary scanning line on a target plane;
• a processing circuit to process images acquired by the electronic sensor, the processing circuit comprising:
• a clock that emits a transfer signal for each of a number of images acquired by said sensor;
• and
• a closed loop control circuit coupled to receive the transfer signal from the clock, and further coupled to provide phase and frequency synchronization signals to the stepper motor.

An optoelectronic device for acquiring images, comprising:

• a lighting source for producing an incident beam;
• an electronic sensor for acquiring images;
• an optical component for forming images on the electronic sensor;
• a deflector rotatably mounted;
• a stepper motor coupled to the deflector to cyclically oscillate or rotate the deflector such that the incident beam describes, during each cycle, angular scanning that generates at least one elementary scanning line on a target plane;
• a processing circuit to process images acquired by the electronic sensor, the processing circuit comprising:
• a clock that emits a transfer signal for each of a number of images acquired by said sensor;
• a closed loop control circuit coupled to receive the transfer signal from the clock, and further coupled to provide phase and frequency synchronization signals to the stepper motor;
• and
• means for prior adjustment of the angular position of the stepper motor body.

A method of operating an optoelectronic device, comprising:

• producing a transfer signal from a clock for each of a number of acquired images;
• producing a first phase signal;
• producing a second phase signal;
• and
• applying the first and the second phase signals to synchronize a stepper motor driving a deflector, the stepper motor having a number of steps that is a multiple or a sub-multiple of a number of facets on the deflector.

A method of operating an optoelectronic device, comprising:

• producing a transfer signal from a clock for each of a number of acquired images;
• producing a first phase signal;
• producing a second phase signal;
• applying the first and the second phase signals to synchronize a stepper motor driving a deflector, the stepper motor having a number of steps that is a multiple or a sub-multiple of a number of facets on the deflector;
• and
• adjusting an angular position of a body of the stepper motor to synchronize a phase of a video signal and a phase of the transfer signal.

A method of operating an optoelectronic device, comprising:

• producing a transfer signal for each of a number of acquired images;
• resetting a counter in response to the transfer signal;
• periodically producing a pixel signal from a clock for sequentially reading each of the acquired images;
• incrementing the counter in response to the pixel signal;
• comparing a value of the counter with a previously defined value;
• producing a phase synchronization signal when the value of the counter is equal to the previously defined value;
• and
• synchronizing a stepper motor based on the transfer signal and the phase synchronization signal.