Patent ID: 7692772
Filing Date: 2010-04-06
Classification: G01S

Abstract:
1. A laser distance measuring apparatus which measures a turnaround time after emitting a laser beam outputted from a laser diode to a target until receiving the laser beam reflected by the target by a light receiving module via a band-pass filter to calculate a distance to the target, comprising: a temperature control module for adjusting a temperature of the laser diode to change a central wavelength of the laser beam output from the laser diode; a level detecting module for detecting a magnitude of light of the reflected laser beam off the target to which the distance from the laser distance measuring apparatus is to be determined, as received via the band-pass filter; a main control module for generating a temperature control signal based on the magnitude of the light of the reflected laser beam detected by the level detecting module, the main control module to output the temperature control signal to the temperature control module to adjust the temperature of the laser diode so that the magnitude of the light of the reflected laser beam is kept in a predetermined range sufficient to determine the distance to the target using the reflected laser beam, wherein the target is not part of the laser distance measuring apparatus.