Imaging systems targeting macroscopic objects tend to have poor depth selectivity. In this Letter, we present a 3D imaging system featuring a depth resolution of 200 μm, depth scanning range of more than 1 m, and view field larger than 70×70 mm2. For depth selectivity, we set up an off-axis digital holographic imaging system using a light source with a coherence length of 400 μm. A prism pair was installed in the reference beam path for long-range depth scanning. We performed imaging macroscopic targets with multiple different layers and also demonstrated imaging targets hidden behind a scattering layer.
Bibliographical noteFunding Information:
This research was supported by the IT R&D Program ( R2013080003 ); the Global Frontier Program ( 2014M3A6B3063710 ); IBS-R023-D1 ; the Basic Science Research Program ( 2013R1A1A2062560 ); the Nano-Material Technology Development Program ( 2011-0020205 ) through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning . It was also supported by the Korea Health Technology R&D Project ( HI14C0748 ) funded by the Ministry of Health and Welfare , Republic of Korea.
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- Imaging systems
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- Interferometric imaging
- Speckle imaging
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering