Title :
Compensation of optical path difference for colorimetric temperature imaging
Author :
Cheng, Yanting ; Xu, Lijun ; Li, Xiaolu ; He, Tao
Author_Institution :
Sch. of Instrum. Sci. & Opto-Electron. Eng., Beihang Univ., Beijing, China
Abstract :
A compensation method of optical path difference for colorimetric temperature measurement is proposed. To ensure images from different paths focusing on the same plane, an optical positive lens was used in the shorter optical path to compensate the path difference. By placing the CCD sensor or focusing the camera lens on this plane, a sharp and clear monochromatic image can be obtained from each path. A colorimetric temperature imaging system was constructed by using the method proposed. Experimental results obtained by using a candle flame showed that the compensation method could effectively reduce the defocusing effect of images caused by optical path difference and improve the resolution of temperature image.
Keywords :
CCD image sensors; colorimetry; compensation; image resolution; optical focusing; optical images; photographic lenses; temperature measurement; CCD sensor; camera lens; candle flame; colorimetric temperature imaging system; colorimetric temperature measurement; compensation method; defocusing effect reduction; monochromatic image; optical path difference; optical positive lens; temperature image resolution; Adaptive optics; Fires; Lenses; Optical imaging; Optical sensors; Optical variables measurement; Temperature measurement; Colormetric temperature measurement; charge coupled device (CCD); optical path compensation; optical path length;
Conference_Titel :
Imaging Systems and Techniques (IST), 2011 IEEE International Conference on
Conference_Location :
Penang
Print_ISBN :
978-1-61284-894-5
DOI :
10.1109/IST.2011.5962199
