Confocal Scheme to Compensate for Defocus Aberration in Digital Holographic Microscopy

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概要

• 論文の詳細を見る

• A confocal setup configuration is herein introduced to experimentally compensate for the defocus aberration due to the micro-objective lens in off-axis digital holographic microscopy. By exploiting the spatially separated nature of zero-order, object, and conjugate images in the off-axis geometry, a second reconstruction plane is added to leave only object images, and thus undesired images that already co-exist in the original reconstruction plane can be spatially filtered out in this plane. The object wavefront can then be reconstructed without unwanted images by executing backward propagation convolution from this latter plane to the former one. Furthermore, using the operator method analysis, the defocus aberration can be compensated for using the proposed scheme, and the reconstructed object wavefront inverted and magnified. For comparison, optical experiments with/without the confocal scheme are implemented and the results are shown to prove the merit of the proposed method.

• 2009-09-25

著者

• Hsieh Wang-ta

  School Of Defense Science National Defense University

• Chang Chi-ching

  Institute Of Electro-optical Engineering Ming Dao University

• Kuo Ming-Kuei

  Department of Electronic & Electrical Engineering, National Defense University, Tashi, Taoyuan 33509, Taiwan, R.O.C.

• Hsieh Wang-Ta

  School of Defense Science, National Defense University, Tashi, Taoyuan 33509, Taiwan, R.O.C.

• Chen Gu-Liang

  School of Defense Science, National Defense University, Tashi, Taoyuan 33509, Taiwan, R.O.C.

• Chang Chi-Ching

  Institute of Electro-Optical Engineering, Ming Dao University, Changhua 52345, Taiwan, R.O.C.

関連論文

• A Simple Arbitrary Phase-Step Digital Holographic Reconstruction Approach without Blurring Using Two Holograms
• Confocal Scheme to Compensate for Defocus Aberration in Digital Holographic Microscopy

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