Title :
Imaging characteristics of 90-deg geometry volume holographic imaging system
Author :
Wenmei Shen ; Zhuqing Jiang ; Yuting Wang ; Lihong Ma
Author_Institution :
Urban Constr. Dept., Hebei Univ. of Archit. & Eng., Zhangjiakou, China
Abstract :
Diffraction imaging characteristics of a 90-deg geometry volume holographic imaging system is investigated in this paper. A volume holographic grating, used as a volume holographic imaging lens in the imaging system, is recorded via illuminating the recording medium with a spherical signal beam and a plane reference beam. According to Bragg selectivity of a volume holographic grating, the Bragg mismatch of diffraction imaging in the different position can cause the significant decrease of diffraction efficiency. The point spread function (PSF) of the volume holographic imaging system is employed to analyze diffraction imaging characteristics and to estimate the depth resolution. The results show that the observed diffracted field obviously changes with the displacement in the z direction.
Keywords :
Bragg gratings; holographic gratings; image resolution; optical transfer function; 90-deg geometry volume holographic imaging lens system; Bragg mismatch; Bragg selectivity; depth resolution; diffracted field; diffraction efficiency; diffraction imaging characteristics; plane reference beam; point spread function; recording medium; spherical signal beam; volume holographic grating; z direction; Approximation methods; Detectors; Diffraction; Geometry; Imaging; Optimized production technology; Probes; 90-deg geometry; Volume holographic imaging (VHI) system; depth resolution; point spread function (PSF);
Conference_Titel :
Electronic and Mechanical Engineering and Information Technology (EMEIT), 2011 International Conference on
Conference_Location :
Harbin, Heilongjiang
Print_ISBN :
978-1-61284-087-1
DOI :
10.1109/EMEIT.2011.6023872
