Ultrafast 3-D shape measurement with an off-the-shelf DLP projector

Gong, Yuanzheng; Zhang, Song; Zhang, Song

Ultrafast 3-D shape measurement with an off-the-shelf DLP projector

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2010_GongY_Ultrafast3DShape.pdf (1.75 MB)

Date

2010-09-13

Authors

Gong, Yuanzheng

Zhang, Song

Authors

Person

Zhang, Song

Professor

Organizational Units

Organizational Unit

Mechanical Engineering

The Department of Mechanical Engineering at Iowa State University is where innovation thrives and the impossible is made possible. This is where your passion for problem-solving and hands-on learning can make a real difference in our world. Whether you’re helping improve the environment, creating safer automobiles, or advancing medical technologies, and athletic performance, the Department of Mechanical Engineering gives you the tools and talent to blaze your own trail to an amazing career.

Department

Mechanical Engineering

Abstract

This paper presents a technique that reaches 3-D shape measurement speed beyond the digital-light-processing (DLP) projector’s projection speed. In particular, a “solid-state” binary structured pattern is generated with each micro-mirror pixel always being at one status (ON or OFF). By this means, any time segment of projection can represent the whole signal, thus the exposure time can be shorter than the projection time. A sinusoidal fringe pattern is generated by properly defocusing a binary one, and the Fourier fringe analysis means is used for 3-D shape recovery. We have successfully reached 4,000 Hz rate (80 µs exposure time) 3-D shape measurement speed with an off-the-shelf DLP projector.

Comments

This article is from Optics Express 18 (2010): 19743–19754, doi:10.1364/OE.18.019743. Posted with permission.

Copyright

Fri Jan 01 00:00:00 UTC 2010

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