Journal of information and communication convergence engineering

  • 제11권2호
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  • Pages.139-146
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  • 2013
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  • 2234-8255(pISSN)
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  • 2234-8883(eISSN)
한국정보통신학회 (The Korea Institute of Information and Commucation Engineering)
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Shaded-Mask Filtering for Extended Depth-of-Field Microscopy

  • 투고 : 2013.03.10
  • 심사 : 2013.04.15
  • 발행 : 2013.06.30
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초록

This paper proposes a new spatial filtering approach for increasing the depth-of-field (DOF) of imaging systems, which is very useful for obtaining sharp images for a wide range of axial positions of the object. Many different techniques have been reported to increase the depth of field. However the main advantage in our method is its simplicity, since we propose the use of purely absorbing beam-shaping elements, which allows a high focal depth with a minimum modification of the optical architecture. In the filter design, we have used the analogy between the axial behavior of a system with spherical aberration and the transverse impulse response of a 1D defocused system. This allowed us the design of a ring-shaded filter. Finally, experimental verification of the theoretical statements is also provided.

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참고문헌

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피인용 문헌

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