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Proceedings Paper

Digital holographic microscope with a wide field of view
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Paper Abstract

We present a digital holographic microscope that has a wide field of view. Off-axis holograms are recorded with a magnified image of microscopic objects and numerically reconstructed by calculation of scalar diffraction in the Fresnel approximation. Holograms are recorded by CCD. The distance between neighbouring pixels of a CCD is only of the order of 5 micrometer. The corresponding maximum resolvable frequency is of the order of 100 linepairs /mm. The maximum angle between the reference and object wave is therefore limited to a few degrees. The higher magnification by an objective lens with the higher power makes the wider angle object beam. Off- axis holograms with the high power objective lens has the limitation of magnification and a field of view. We present a new type of imaging system that overcomes the limitation of magnification and a field of view. It is consisted of an objective lens and additional lens array. It makes the nearly same angle between object beams and a reference beam. The overlapped angles are also less than the maximum limited angle due to CCD pixel size. It also has a maximum field of view which is decided inherently by an objective lens. It therefore overcomes the limitation of the size of CCD.

Paper Details

Date Published: 15 November 2005
PDF: 9 pages
Proc. SPIE 6016, Three-Dimensional TV, Video, and Display IV, 60160W (15 November 2005); doi: 10.1117/12.630262
Show Author Affiliations
Sanghoon Shin, Korea Institute of Science and Technology (South Korea)
Minchul Park, Korea Institute of Science and Technology (South Korea)
Il ki Han, Korea Institute of Science and Technology (South Korea)
Jung-Young Son, Hanyang Univ. (South Korea)


Published in SPIE Proceedings Vol. 6016:
Three-Dimensional TV, Video, and Display IV
Bahram Javidi; Fumio Okano; Jung-Young Son, Editor(s)

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