Importance

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Abstract

A range imaging device such as a distance camera is improved by incorporating an oscillator to generate a reference signal, a light source to emit a light modulated in accordance with the reference signal and to project the light onto a three-dimensional target. A condenser lens collects and condenses a secondary light reflected by the target and projects the secondary light onto a gating image intensifier, which selectively gates the secondary light in synchronism with a pair of out-of-phase gate signals generated in accordance with the reference signal. Range information contained in the secondary light is extracted by the gating process. A CCD camera receives the gated secondary light and produces a corresponding image signal which is processed to produce a range image of the target.

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First Claim