Coherent noise suppression of phase images in digital holography by rotating illuminating light

Li Yan; Xiao Wen; Pan Feng; Rong Lu

doi:10.3788/HPLPB20132506.1345

Volume 25 Issue 06

Apr. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(06): 1345-1350

Li Yan, Xiao Wen, Pan Feng, et al. Coherent noise suppression of phase images in digital holography by rotating illuminating light[J]. High Power Laser and Particle Beams, 2013, 25: 1345-1350. doi: 10.3788/HPLPB20132506.1345

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Li Yan, Xiao Wen, Pan Feng, et al. Coherent noise suppression of phase images in digital holography by rotating illuminating light[J]. High Power Laser and Particle Beams, 2013, 25: 1345-1350. doi: 10.3788/HPLPB20132506.1345

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Coherent noise suppression of phase images in digital holography by rotating illuminating light

doi: 10.3788/HPLPB20132506.1345

1.
Key Laboratory of Precision Opto-mechatronics Technology,Ministry of Education,Beihang University,Beijing 100191,China

Received Date: 2012-07-03
Rev Recd Date: 2012-10-08
Publish Date: 2013-04-08

Abstract

Abstract

A method based on superposition of multiple reconstructed images is presented for coherent noise reduction of the phase image in digital holography. The proposed method obtains multiple off-axis holograms upon rotation of the illuminating light in the polar plane under a constant azimuthal angle. Both the tilt factor and lateral shift of the reconstructed phase distribution are compensated by using the phase compensation algorithm and digital image registration method respectively. The coherent noise in the synthesized images is significantly suppressed by averaging reconstructed imaging fields. The experimental results and the related statistical evaluation have demonstrated the effectiveness of this approach.
- coherent noise reduction,
- multiple off-axis holograms,
- rotation of illuminating light,
- digital image autocorrelation registration method

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