Novel rangefinding system using a correlation image sensor

Akira Kimachi; Toru Kurihara; Masao Takamoto; Shigeru Ando

doi:10.1117/12.410881

22 December 2000 Novel rangefinding system using a correlation image sensor

Akira Kimachi, Toru Kurihara, Masao Takamoto, Shigeru Ando

Proceedings Volume 4309, Videometrics and Optical Methods for 3D Shape Measurement; (2000) https://doi.org/10.1117/12.410881
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

This paper proposes a 3D measurement principle for the correlation image sensor (CIS), which generates temporal correlation between light intensity and an external reference signal at each pixel. Another key of our system besides the CIS is amplitude-modulation of the scanning sheet beam, the phase of which relative to a reference signal is varied according to the scanning angle. After a scan within a frame, the phase is demodulated with a quadrature pair of reference signals and output by the CIS to compute the individual angle of the sheet bam at each pixel. By virtue of lock-in detection principle, the effects of background illumination and/or surface reflectance nonuniformity of the object are thoroughly removed. We implemented this system using our CMOS 64 by 64 pixel CIS, and successfully reconstructed a depth map under its frame rate.

Citation Download Citation

Akira Kimachi, Toru Kurihara, Masao Takamoto, and Shigeru Ando "Novel rangefinding system using a correlation image sensor", Proc. SPIE 4309, Videometrics and Optical Methods for 3D Shape Measurement, (22 December 2000); https://doi.org/10.1117/12.410881

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