Patent ID: 6683676
Filing Date: 2004-01-27
Classification: G01S

Abstract:
A three-dimensional image capturing device, comprising:a light source that irradiates a distance measuring light beam, which irradiates a measurement subject and is a pulsed beam, said measurement subject reflecting said distance measuring light beam to generate a reflected light beam pulse; a first distance information sensing processor that senses a first reflected light component (E1) for a first reflected light sensing period, said first reflected light component corresponding to a distance from said device to said measurement subject and containing a fall of said reflected light beam pulse; a second distance information sensing processor that senses a second reflected light component (E2) for a second reflected light sensing period, said second reflected light component corresponding to said distance and containing a rise of said reflected light beam pulse, the length of said reflected light sensing period being equal to that of said first reflected light sensing period; and a normalized distance information calculating processor that obtains a ratio (E1)/(E1+E2), which is obtained by dividing said first reflected light component (E1) by a sum of said first and second reflected light components (E1+E2), as a normalized distance information corresponding to said distance.