Multiwavelength digital holography with autocalibration of phase shifts and artificial wavelengths

Carl, Daniel; Fratz, Markus; Pfeifer, Marcel; Giel, Dominik M.; Höfler, H

doi:10.1364/ao.48.0000h1

Cited by 68 publications

(36 citation statements)

References 28 publications

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“…[36][37][38][39] The algorithm from [36] is adopted here for three image acquisitions, but it can easily be extended to more phase steps. To remove the mean component I 0 the differences between the patterns are defined as…”

Section: Determine the Phase Steps Du 1 And Dumentioning

confidence: 99%

Fault Tolerant Algorithm for Structured Illumination Microscopy with Incoherent Light

Wang

Heidingsfelder

Gao

et al. 2015

International Journal of Optomechatronics

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In this contribution we present a new algorithm for structured illumination microscopy with incoherent light. Existing algorithms for determining the contrast values of the focal depth response require a high accurate phase shift of the fringe pattern illumination. The presented algorithm, which is robust against inaccurate phase shift of the fringe pattern, reduces significantly the requirements for the phase shift and consequently the costs of the microscope. The new algorithm was tested by a preliminary experiment, whereby the grating was shifted by an elastic guided micro-motion mechanism employing a low-cost stepper motor replacing the conventional expensive piezo drive. The determined focal depth response is very smooth and corresponds very well to the theoretical focal depth response.

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Section: Determine the Phase Steps Du 1 And Dumentioning

confidence: 99%

Fault Tolerant Algorithm for Structured Illumination Microscopy with Incoherent Light

Wang

Heidingsfelder

Gao

et al. 2015

International Journal of Optomechatronics

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“…Since its release, many papers using NVIDIA GPU and CUDA have been published in optics. In particular, calculations of CGH [62,63,64,65,66] and reconstruction in digital holography [44,45,49,67,68,69,70] have successfully accelerated these calculations. Figure 7 shows the structure of an NVIDIA GPU, featuring GPU chips with some Multi-Processors (MP).…”

Section: Gwo and Gwopls Classes: Diffraction And Cgh Calculations On Gpumentioning

confidence: 99%

Computational wave optics library for C++: CWO++ library

Shimobaba¹,

Weng²,

Sakurai³

et al. 2012

Computer Physics Communications

107

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Diffraction calculations, such as the angular spectrum method, and Fresnel diffractions, are used for calculating scalar light propagation. The calculations are used in wide-ranging optics fields: for example, computer generated holograms (CGHs), digital holography, diffractive optical elements, microscopy, image encryption and decryption, three-dimensional analysis for optical devices and so on. However, increasing demands made by large-scale diffraction calculations have rendered the computational power of recent computers insufficient. We have already developed a numerical library for diffraction calculations using a graphic processing unit (GPU), which was named the GWO library. However, this GWO library is not user-friendly, since it is based on C language and was also run only on a GPU. In this paper, we develop a new C++ class library for diffraction and CGH calculations, which is referred as to a CWO++ library, running on a CPU and GPU. We also describe the structure, performance, and usage examples of the CWO++ library.Comment: 18 page

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“…The third strategy is based on phase unwrapping for the object in terms of the nature of holography; it is also the strategy we focus on in this paper . Relevant investigations have occurred worldwide for years.…”

Section: Introductionmentioning

confidence: 99%

Realization of Absolute‐Phase Unwrapping and Speckle Suppression in Laser Digital Holography

Wang

Zheng

et al. 2017

Annalen der Physik

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In this paper, an absolute-phase unwrapping and speckle suppression approach to reconstruct a three-dimensional (3-D) image of an object with laser digital holography is described. This method offers three advantages to enhance the performance of the phase reconstruction technique. First, both speckle suppression and phase unwrapping are processed in the complex amplitude domain rather than in the single phase or amplitude domain. With this approach, the phase details of the object are better preserved upon phase reconstruction. Second, the proposed algorithm requires no threshold determination and thus achieves self-adaptive speckle suppression and robust phase unwrapping, in contrast to other methods. Finally, an improved dual-domain image denoising method is applied to further remove speckle-remnant-induced phase distortion. Ideal 3-D phase reconstruction results are obtained both theoretically and experimentally for the first time.

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Multiwavelength digital holography with autocalibration of phase shifts and artificial wavelengths

Cited by 68 publications

References 28 publications

Fault Tolerant Algorithm for Structured Illumination Microscopy with Incoherent Light

Fault Tolerant Algorithm for Structured Illumination Microscopy with Incoherent Light

Computational wave optics library for C++: CWO++ library

Realization of Absolute‐Phase Unwrapping and Speckle Suppression in Laser Digital Holography

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