OPTIMISED TIME OF FLIGHT VISION CAMERA FOR A MULTI-CAMERA ENVIRONMENT
The invention concerns a TOF vision camera and proposes an electronic control circuit comprising a modulation circuit MOD for modulating the carrier clock signal, applying a camera-specific pulse position modulation function k(t) in order to output a modulation clock signal fe which is applied in th...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | The invention concerns a TOF vision camera and proposes an electronic control circuit comprising a modulation circuit MOD for modulating the carrier clock signal, applying a camera-specific pulse position modulation function k(t) in order to output a modulation clock signal fe which is applied in the camera as a camera light source modulation signal S-LED, in order to control the emission of a series of light pulses SE and in order to synchronously control the N capture phases ST0, ST1, ST2, ST3 of the matrix image sensor CI of the camera. This modulation clock signal fe is such that the clock pulses fe have a constant pulse duration Tp, fixed by the carrier frequency fp, where Tp=½fp, and with a variable time interval Toff between two successive pulses, modulated by said modulation function k(t), said time interval being at least equal to the pulse duration, defining a modulation clock cycle ratio fe that is variable but less than or equal to 50%. |
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