Distance measuring apparatus

摘要

A distance measuring apparatus for measuring the distance to an object has a line of charge coupled device (CCD) elements which serve as two sensors for passive sensing and one sensor, in combination with a light emitting element, for active sensing. An infrared light cut-off filter is provided on the light receiving surface of all the elements while a visible light cut-off filter is provided on the light receiving surface of the elements corresponding to the active sensor. The light emitting element is provided with a pattern mask so that the object is irradiated with a pattern of light intensity. The active sensor detects the pattern and from this the position of the spectral center of the image can be determined to enable a distance value to be ascertained.