Title :
Adaptive Tracing System with a Spatial Light Modulator
Author :
Liu, Bohan ; Zhang, Jian
Author_Institution :
Inst. of Ultra Precision Opt. & Electron. Instrum. Eng., Harbin Inst. of Technol.
Abstract :
A new type of tracing system with liquid crystal spatial light modulator (SLM) is proposed to steer the light dynamically. The positions information of the spatial objects is obtained from the image captured by a video tracking system. According to the information the SLM can control the beams directions and focus the energy on the objects with the phase-only modulation method. The Gerchberg-Saxton algorithm is adopted as the optimal algorithm to approaching the objects. Results show that the response time of steering is less than 50 milliseconds and the angle errors less than 0.032deg. Such a tracing system will be of value in the fields of multi-object tracing, laser guiding and multi-object defense
Keywords :
adaptive systems; liquid crystals; modulation; object detection; spatial light modulators; video signal processing; Gerchberg-Saxton algorithm; adaptive tracing system; laser guiding; light dynamical steering; liquid crystal spatial light modulator; multiobject defense; multiobject tracing; phase-only modulation; spatial objects; video tracking system; Adaptive systems; Cameras; Delay; Liquid crystals; Optical diffraction; Optical modulation; Optical refraction; Optical variables control; Phase modulation; Refractive index; Spatial Light Modulator; object tracing; optimal algorithm; phase-only modulation;
Conference_Titel :
Intelligent Control and Automation, 2006. WCICA 2006. The Sixth World Congress on
Conference_Location :
Dalian
Print_ISBN :
1-4244-0332-4
DOI :
10.1109/WCICA.2006.1713364
