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

Claim 13:
14. A method for calibrating and monitoring the position displacement of a camera 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 camera 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 camera 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.