Patent ID: 11908147
Assignee: LUMINCODE AS
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 15:
16. A method combining a first method and a second method, the first method being the method of claim 14, the second method being a method for calibrating and monitoring a laser wavelength shift and the laser position displacement relative to a support,
the method comprising in a calibration step:
Illuminating a pattern generator with laser light from a laser;
controlling and recording the temperature of one or several of the laser, the pattern generator, the camera, and the support by means of a heat pump and a temperature sensor;
recording by use of the camera and a computer individual patterns of light reflected by the pattern generator, or transmitted through the pattern generator;
recording by use of the camera and computer a composite pattern of light consisting of the individual patterns concurrently with the recording of the temperatures of the temperature sensors;
calculating from minimum a composite pattern the position displacement of the individual pattern components;
calculating the individual pattern responsivity parameters relating the camera and laser position displacements and laser wavelength shift to the geometrical configuration of the laser, the pattern generator, and the camera;
the method further comprising a monitoring step, wherein the monitoring step is either a first monitoring step or a second monitoring step,
wherein the first monitoring step comprises:
Illuminating a pattern generator with laser light;
controlling and recording the temperature of one or several of the laser, the pattern generator, the camera, and the support by means of a heat pump and a temperature sensor;
recording by use of the camera and computer a composite pattern of light consisting of the individual pattern components concurrently with the recording of the temperatures of the temperature sensors;
calculating from minimum a composite pattern the position displacement of the individual pattern components;
calculating the laser wavelength shift and the laser position displacement by use of the individual pattern displacements, and the responsivity parameters;
wherein the second monitoring step comprises:
controlling and recording the temperature of one or several of the laser, the camera, and the support by means of a heat pump and a temperature sensor;
calculating the laser wavelength shift and the laser position displacement, from the monitoring temperature recordings and the calibration responsivity relations between the camera and laser position displacement, laser wavelength shift, and temperature recordings,
wherein a laser wavelength shift and position displacement are calibrated and monitored according to the second method thereby helping more accurate calibration and monitoring of the camera position displacement according to the first method.