Please wait a minute...
工程设计学报
Chinese Journal of Engineering Design  2012, Vol. 19 Issue (5): 400-404    DOI:
    
FPGA-based dual-signal processing system of polarization-sensitive OCT
 HUANG  Rui, CHEN  Xiao-Dong, WANG  Yi, YU  Dao-Yin
College of Precision Instruments & Opto-electronic Engineering, Tianjin University,Opto-electronic Information Science and Technical Laboratory, Ministry of Education, Tianjin 300072, China
Download: HTML     PDF(510KB)
Export: BibTeX | EndNote (RIS)      

Abstract  In consideration of the deficiencies in a polarization-sensitive OCT system based on the computer, such as low data-processing rate, unachievable realtime display and so on, a FPGA-based dual-signal processing system of polarization-sensitive OCT was built. FPGA design consisted of three modules: synchronous sequential control, quadrature demodulation and CORDIC arithmetic operations. Synchronous control signals was provided by synchronous sequential control module for each device of the system to achieve real-time processing of data and simultaneous display. The interference signal followed by pretreatment was implemented by quadrature demodulation and CORDIC arithmetic operations to proceed amplitude demodulation and phase demodulation, the obtained data of reflectivity and birefringence was sent into the computer to achieve real-time display via the USB interface. the polarization-sensitive OCT experiment was designed by the paper to obtain two-dimensional image of cover slip, mica and biological tissue, after analyzing the result of experiment, the ability of real-time detecting in reflectivity and birefringence is verified.

Key words： PS-OCT      birefringence      dual-signal      FPGA      CORDIC algorithm     
Published: 28 October 2012
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
HUANG Rui
CHEN Xiao-Dong
WANG Yi
YU Dao-Yin
Cite this article:

HUANG Rui, CHEN Xiao-Dong, WANG Yi, YU Dao-Yin. FPGA-based dual-signal processing system of polarization-sensitive OCT. Chinese Journal of Engineering Design, 2012, 19(5): 400-404.

URL:

https://www.zjujournals.com/gcsjxb/     OR     https://www.zjujournals.com/gcsjxb/Y2012/V19/I5/400


基于FPGA的偏振OCT双路信号处理系统

针对目前基于计算机的偏振OCT具有系统数据处理速度慢、不能实时显示等问题,设计了基于FPGA的偏振OCT双路信号处理系统.FPGA设计包含同步时序控制、正交解调和CORDIC运算三个模块.同步时序控制模块为系统的各器件提供同步控制信号,实现数据的实时处理和同步显示.正交解调和CORDIC运算模块对预处理后的干涉信号进行振幅解调和相位解调,获取反射率和双折射率数据,经USB接口送入计算机进行实时显示.对玻片、云母片和生物组织进行偏振OCT系统成像,对成像结果的分析验证了系统具有实时探测生物组织反射率和双折射率的能力.

关键词： 偏振OCT,  双折射,  双路信号,  FPGA,  CORDIC算法 
[1] ZHAO Yan, MA Tie-Hua, DU Hong-Mian, LI Jing-Jing, MI Sha, TIAN Zhuang. Design of shock wave overpressure acquisition system based on FPGA and wireless communication[J]. Chinese Journal of Engineering Design, 2011, 18(6): 449-452.
[2] LIU Yong, XU Ai-Qiang, MENG Shang. Implementation of negative selection algorithm matching rules on FPGA[J]. Chinese Journal of Engineering Design, 2010, 17(6): 464-468.
[3] YANG Ke-Ji, SANG Wu-Bin. High resolution PZT digital driving power supply based on FPGA[J]. Chinese Journal of Engineering Design, 2008, 15(6): 435-438.
[4] GAO Kun, LIU Li, WANG Le-Zi. One integrated implementation method for 32-bit VXI bus interface circuit design[J]. Chinese Journal of Engineering Design, 2002, 9(1): 36-40.