A multiple phase demodulation method for high resolution of the laser scanner

To have higher resolution of distance in the laser scanner using the phase demodulation method, signal should be modulated with a high frequency. In the signal processing of modulation and demodulation, it is inevitable to amplify the signals. However, it is not easy to amplify the high frequency si...

Full description

Saved in:
Bibliographic Details
Published inReview of scientific instruments Vol. 80; no. 5; p. 056106
Main Authors Yoon, Heesun, Yeom, Woosub, Kang, Seonggu, Hong, Jinpyo, Park, Kyihwan
Format Journal Article
LanguageEnglish
Published United States 01.05.2009
Online AccessGet more information

Cover

More Information
Summary:To have higher resolution of distance in the laser scanner using the phase demodulation method, signal should be modulated with a high frequency. In the signal processing of modulation and demodulation, it is inevitable to amplify the signals. However, it is not easy to amplify the high frequency since the amplifying gain is restricted by the frequency bandwidth. It is advantageous to demodulate using an intermediate frequency in which high gain amplification as well as less contaminated signal is obtained. Analytical and experimental results are presented to show how the intermediate frequency demodulation method works and how good performance is obtained in the time and frequency domains.
ISSN:1089-7623
DOI:10.1063/1.3121218