We present a three-dimensional imaging method using a pulsed laser as a flood illuminating source and an intensified camera as the receiver with exponentially modulated gain. The depth map of a scene is obtained from two intensity images and the depth accuracy is independent of the depth of the target in the scene. We demonstrate a depth-independent depth accuracy of 0.32 m in an indoor experiment and obtain a depth map of an outdoor scene ranging from 150 to 180 m under a lower signal to noise ratio condition.
© 2009 Optical Society of America
Original Manuscript: September 2, 2009
Revised Manuscript: October 6, 2009
Manuscript Accepted: October 7, 2009
Published: November 11, 2009
Chenfei Jin, Xiudong Sun, Yuan Zhao, Yong Zhang, and Liping Liu, "Gain-modulated three-dimensional active imaging with depth-independent depth accuracy," Opt. Lett. 34, 3550-3552 (2009)