DISTANCE INFORMATION OBTAINING DEVICE

A distance information obtaining device which uses an image pickup device, to pick up an optical image of an object and produce a picture signal, and a signal processor which process the signal picture and calculates therefrom the distance between the object and the pickup device. A corrective filter is located along the optical path, which includes both an illuminating beam and a beam reflected off of the object, in order to correct the spectral characteristics of the light beam, the sensors located in the image pickup device and the color of the object. The corrective filters can be placed in various positions along the path. A method is provided to interchange various corrective filters according to the characteristics of the object.