Open AccessPartially light-controlled imaging system based on High Temperature Poly-Silicon Thin Film Transistor-Liquid Crystal Display
Author(s) -
Yuanhe Tang,
Ruixia Zhang,
Haiyang Gao,
Kai Li,
Gaoxiang Zhao,
Xusan Yang,
Qing Li,
Yuan Liang,
Na Ye,
Hanchen Liu,
Shulin Liu
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.010616
Subject(s) - shutter , optics , materials science , liquid crystal on silicon , thin film transistor , transmittance , optoelectronics , liquid crystal display , light intensity , microlens , lens (geology) , liquid crystal , silicon , physics , layer (electronics) , composite material
A partially light-controlled imaging system is proposed as a novel device. It is used to improve the imaging quality at the illumination of 1.979 x 10(5)lx by means of mitigating image contrast. It consists of a High Temperature Poly-Silicon Thin Film Transistor-Liquid Crystal Display (HTPS TFT-LCD), which is set between the lens and CCD and is coupled with CCD by the optical fiber taper. The transmittance of pixelated LCD can be controlled by Field-Programmable Gate Array to realize the partially light-controlled and thus dynamic range of the imaging system can be extended. Samples of indoor objects and outdoor license plate are photographed by the prototype imaging system under strong light. The imaging results of this novel system are satisfactory with better restored details, compared with the photos taken by normal CCD camera (WAT-231S2) which uses aperture and shutter to control the overall light intensity.