Real-time single frame range finder using spatially phase-modulated light

Author

Goto, Kenji ; Ono, Nobutaka ; Ando, Shigeru

Author_Institution

Dept. of Inf. Phys. & Comput., Univ. of Tokyo, Japan

Volume

1

fYear

2002

fDate

5-7 Aug. 2002

Firstpage

78

Abstract

This paper proposes a novel 3D measurement system using spatially phase-modulated light, which have a single frequency for time but have different phase according to the projection angle. Another key of our system is the three-phase correlation image sensor(3PCIS), which generates temporal correlations between light intensity and three external reference signals on each pixel. Within a frame, amplitude and phase of the spatially phase-modulated light are demodulated and output by the 3PCIS to compute the individual angle on each pixel. We implemented this system using our CMOS 32 × 32-pixel 3PCIS, and successfully reconstructed the range map on each pixel.

Keywords

CMOS image sensors; correlation methods; distance measurement; optical modulation; phase modulation; real-time systems; 1024 pixel; 32 pixel; 3D measurement system; 3PCIS; CMOS; demodulation; external reference signals; light intensity; projection angle; range map reconstruction; real-time single frame range finder; spatially phase-modulated light; temporal correlations; three-phase correlation image sensor; Cameras; Equations; Frequency measurement; Image sensors; Lighting; Optical modulation; Phase measurement; Phase modulation; Pixel; Signal generators;

fLanguage

English

Publisher

ieee

Conference_Titel

SICE 2002. Proceedings of the 41st SICE Annual Conference

Print_ISBN

0-7803-7631-5

Type

conf

DOI

10.1109/SICE.2002.1195186

Filename

1195186