Patent ID: 6411782
Filing Date: 2002-06-25
Classification: G02B

Abstract:
A distance-measuring device comprising:at least a pair of integration-type light-receiving sensors for receiving light from subjects and producing a subject image signal; a light projecting section for projecting light onto subjects; a steady-state light removing section for obtaining an image signal by removing a steady-state light component from the subject image signal produced by said pair of integration-type light-receiving sensors, while said light projecting section is projecting light onto said subjects; and a CPU for: (i) measuring a subject distance based on the image signal obtained by said steady-state light removing section; (ii) causing said subject distance to be measured for a specific time and, based on a resulting image signal, selecting a subject with an integrated value in a specified range determined by a reflectivity of the subject from a largest integrated value excluding a high-frequency peak originating in light reflected from the subjects by regular reflection; and (iii) measuring a distance to the selected subject, based on the subject image signal produced by said pair of integration-type light-receiving sensors, while said light projecting section is not projecting light onto said subjects.