Title :
Ultrafast Three-Dimensional Imaging System Based on Phase-Shifting Method and Hybrid Dispersion Laser Scanning
Author :
Bo Dai ; Dong Wang ; Qi Wang ; Ruijin Hong ; Dawei Zhang ; Songlin Zhuang ; Xu Wang
Author_Institution :
Shanghai Key Lab. of Modern Opt. Syst., Univ. of Shanghai for Sci. & Technol., Shanghai, China
Abstract :
In this paper, we proposed an ultrafast 3-D imaging system based on phase-shifting method and a hybrid dispersion scanning technique. The imaging system is capable of acquiring the 3-D shape of the object at an ultrafast scan rate. A theoretical model is built to describe the operation principle of the imaging system and to analyze the performance of the system. In the demonstration, the imaging system is designed with practical devices and components. The system has a scan rate of 25 MHz and a frame rate of 100 kHz. The field of view is 50 μm × 50 μm, and the number of pixels of one frame is 260 pixel × 1000 pixel. The reconstructed 3-D image has the peak signal-to-noise ratio (PSNR) of 30.11 dB. The performance of the imaging system is investigated by analyzing the influence of the input beam size and the resolution of the digitizer. The input collimated light with large beam size is preferred for high image quality. Moreover, the depth resolution can be improved by using high-resolution digital signal processing.
Keywords :
image reconstruction; image resolution; laser beams; optical design techniques; optical images; optical scanners; PSNR; depth resolution; digitizer resolution; high-resolution digital signal processing; hybrid dispersion laser scanning; image quality; image reconstruction; input beam size; input collimated light; peak signal-to-noise ratio; phase-shifting method; ultrafast scan rate; ultrafast three-dimensional imaging system; Dispersion; Image reconstruction; Optical imaging; Optical pulses; Optical reflection; Three-dimensional displays; Imaging systems; ultrafast measurements;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2015.2428248
