Laser control in scanners
AssigneeHewlett-Packard Development Company, L.P.
InventorsBill Meyer, Matthew G. Lopez
Life of this patent
Estimating the term…
Abstract
An example device including a laser source for generating a laser pulse, a scanner for mounting the laser source, and a motion detector for detecting a motion of the scanner when the laser pulse scans an object. The motion detector includes an optical sensor for generating an optical signal based on the motion of the scanner, and a controller. The controller determines a movement of the scanner and disables the laser source when the scanner ceases to move.
Claims20
A device comprising:
- a laser source to generate a laser pulse;
- a scanner connected to the laser source;
- a motion detector to detect a motion of the scanner when the laser pulse scans an object, wherein the motion detector comprises an optical sensor to generate a first optical signal and receive a second optical signal responsive to the first optical signal from an encoder based on the motion of the scanner;
- and
- a controller communicatively coupled to the motion detector to:
- receive an output indication from the motion detector, the output indication having a first value responsive to the second optical signal received by the optical sensor indicating that the scanner has ceased to move, and
- disable the laser source responsive to the output indication set to the first value indicating that the scanner has ceased to move.
A device comprising:
- a scanner;
- a laser source to generate a laser pulse, wherein the laser source is mounted on the scanner;
- an optical sensor to:
- generate a first optical signal,
- receive a second optical signal responsive to the first optical signal from an encoder, and
- generate a first output comprising an electrical pulse series responsive to the second optical signal received by the optical sensor when the scanner is moving;
- a low pass filter to filter the first output from the optical sensor;
- and
- a first controller to enable or disable the laser source using a second output from the low pass filter based on the filtering of the first output.
A non-transitory computer readable medium comprising instructions that when executed cause a controller of an electronic device to:
- control a laser source to generate a laser pulse for scanning an object;
- control an optical sensor to generate a first optical signal transmitted to a scanner;
- filter a series of electrical pulses generated by the optical sensor in response to receiving a second optical signal responsive to the first optical signal from the scanner;
- compare a result of the filtering with a predetermined threshold;
- determine a state of movement of the scanner based on the companion of the result of the filtering with the predetermined threshold;
- and
- control an operation of the laser source based on the determined state of movement of the scanner.
Dependencies are inferred from the claim text.