| Project ID |
BPN721 |
| Website |
|
| Start Date |
Wed 2013-Aug-14 20:43:15 |
| Last Updated |
Fri 2018-Jan-26 16:32:01 |
| Abstract |
Range-finding sensors have applications that span several industries and markets, from industry
metrology, robotic control to autonomous vehicles. Frequency-modulated continuous-wave Lidar
has been proven effective in providing high resolution distance and velocity measurements, but
suffers from limited range due to the limited coherence length of tunable laser sources.
Implementations typically require expensive lasers with large coherence length or complex
feedback to linearize tunable laser sweeps and extend coherence length. Instead, we use
resampling methods to linearize laser sweeps and reduce laser phase noise, all in post-
processing, thus reducing the need for precision feedback control or expensive tunable laser
hardware. We have demonstrated sub-millimeter resolution at free-space distances >20-meters
with 1-inch receiving aperture. In addition, we present a demonstration of this technology
which approaches reasonable 3D image acquisition speeds with sub-mm depth precision. Use of
FPGA or GPU for post-processing can help approach real-time frame-rates 3D imaging. |
| Status |
Continuing |
| Funding Source |
DARPA |
| IAB Research Area |
NanoPlasmonics, Microphotonics & Imaging |
| Researcher(s) |
Xiaosheng Zhang |
| Advisor(s) |
Ming C. Wu |
|
|
