Patent ID: 6243537
Filing Date: 2001-06-05
Classification: G01C,G01S,G02B

Abstract:
A distance measuring apparatus for measuring the distance to an object, the apparatus comprising:a light receiving sensor comprising a plurality of charge couple device (CCD) elements;a light emitting element for radiating light towards an object; anda system for operating said sensor as an active sensor in combination with the light emitting element for active sensing;wherein the operating system obtains a first data from the sensor while the light emitting element is emitting light, obtains a second data from the sensor while the light emitting element is not emitting light, and detects a spectral center of a received image of the object using operational data evaluated from the obtained first and second data, andwherein said operating system uses predetermined regions of said elements to extract correction data from said first data and said second data, applies said correction data to correct at least one of said first data and second data, and said operational data is evaluated in accordance with a difference between the first data and second data after application of said correction data.