Co-axial depth map sensor with an extended depth range

Mohan Xu; Hong Hua

doi:10.1117/12.2523653

27 February 2019 Co-axial depth map sensor with an extended depth range

Mohan Xu, Hong Hua

Proceedings Volume 11040, Optical Design Challenge 2019; 1104003 (2019) https://doi.org/10.1117/12.2523653
Event: SPIE Optical Design Challenge, 2019, San Francisco, California, United States

Abstract

The conventional depth map sensors have limited depth range, or they need to sacrifice depth accuracy for a larger working range. To overcome such problems, in this work, we propose a co-axial depth map sensor with an extended depth range based on controlled aberrations. This depth map sensor implements depth measurement by projecting a near-infrared astigmatic pattern onto the test scene and measuring the contrast change of the reflected pattern image in the tangential and sagittal directions. By adding a tunable lens in the projection optics, this depth map sensor can achieve the extended depth measurement without the loss of high depth accuracy and high depth map resolution.

Citation Download Citation

Mohan Xu and Hong Hua "Co-axial depth map sensor with an extended depth range", Proc. SPIE 11040, Optical Design Challenge 2019, 1104003 (27 February 2019); https://doi.org/10.1117/12.2523653

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