| 摘要 |
Disclosed is a distance measuring apparatus for measuring the distance to an object. The apparatus has a line of charge couple device (CCD) elements which are operated as two sensors (PSA, PSB) for passive sensing and one sensor (AS) in combination with a light emitting element (40) for active sensing. An infrared light cut-off filter (33) is provided on the light receiving surface of all the elements while a visible light cut-off filter (34) is overlaid the light receiving surface of the elements corresponding to the active sensor. An optical system (20) is located to form an image of the object on the sensors. A control circuit (50) initially operates the passive sensors during passive sensing and then operates the active sensor during active sensing. The provision of both passive and active sensing in one apparatus enables miniaturization, a decrease in weight, and cost-savings.
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