Patent ID: 8379930

Claim:
A distance measuring system, comprising: a light source module for emitting a first infrared light beam and a second infrared light beam in an alternating manner to a measurement object, the first infrared light beam having a first central wavelength, the infrared light beam having a second central wavelength, the first infrared light beam having a same intensity with the second infrared light beam; an image capturing device configured for capturing images of the first and second infrared light beams reflected by the measurement object; a signal processing unit configured for analyzing the images of the first and second infrared light beams reflected by the measurement object to determine intensities thereof; a selecting unit configured for selecting one of the first and second reflected infrared light beams whichever has a greater intensity; a distance calculating unit configured for calculating a distance to the object from to the distance measuring system according to the intensity of the selected one of the first and second reflected infrared light beams.