Abstract

Three-dimensional range-finding systems are widely used in various applications and fields. Especially on mobile devices and automotive, the measurement stability and reliability are strongly required under a strong ambient light like a sunlight. The projected and reflected light is often much weaker than the strong background light. This paper presents a new 3-D Range-finding system which is based on light-section method with the modulated light and the image sensor that can detect the modulated light while suppressing the background light. The proposed image sensor has been designed and being fabricated in 0.18-um CMOS process. The simulation result of signal to background ratio (SBR) is −34.0 dB and dynamic range is 80 dB.

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