High resolution digital holographic synthetic aperture applied to deformation measurement and extended depth of field method

Claus, Daniel

doi:10.1364/ao.49.003187

Cited by 31 publications

(18 citation statements)

References 18 publications

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“…(1), the achieved resolution, the SBP, and η for both hologram are shown in Figs. 12(a) and 12(b), and the results from two recent papers [7,14] are shown in Table 1 In conclusion, it was found that the result obtained for the maximum resolution matches well with the expected value. Furthermore, the SBP and the η obtained can compete with the results published in recent papers [7,14].…”

Section: Usaf-1951 Test Targetsupporting

confidence: 67%

“…A commonly applied resolution improvement technique in digital holography is based on the synthetic aperture method, as presented in [4][5][6][7]. This method is based on either shifting a single sensor laterally by an amount equal to or slightly smaller than the sensor size (see [4,5,7]) or using laterally distributed multiple sensors (see [6]). Another way to implement the synthetic aperture method is based on tilted object illumination, in which the object is illuminated at different angles as discussed in [8].…”

Section: Introductionmentioning

confidence: 99%

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High-resolution digital holography utilized by the subpixel sampling method

et al. 2011

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Section: Usaf-1951 Test Targetsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

High-resolution digital holography utilized by the subpixel sampling method

et al. 2011

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“…14(c) is based on the calculation of the variance within a sliding window that is moved across each of the images, as discussed in Ref. 43. A structured object, which is in focus, results in a high variance value.…”

Section: Depth From Focusmentioning

confidence: 99%

Focus and perspective adaptive digital surgical microscope: optomechanical design and experimental implementation

2017

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This paper relates to the improvement of conventional surgical stereo microscopy via the application of digital recording devices and adaptive optics. The research is aimed at improving the working conditions of the surgeon during the operation, such that free head movement is possible. The depth clues known from conventional stereo microscopy in interaction with the human eye’s functionality, such as convergence, disparity, angular elevation, parallax, and accommodation, are implemented in a digital recording system via adaptive optomechanical components. Two laterally moving pupil apertures have been used mimicking the digital implementation of the eye’s vergence and head motion. The natural eye’s accommodation is mimicked via the application of a tunable lens. Additionally, another system has been built, which enables tracking the surgeon’s eye pupil through a digital displaying stereoscopic microscope to supply the necessary information for steering the recording system. The optomechanical design and experimental results for both systems, digital recording stereoscopic microscope and pupil tracking system, are shown.

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“…[7] in 2001, creating a synthetic aperture of 4096 x 1024 pixels (4.2 Mpix) from a CCD array that was 1024 x 1024 pixels. Since then, work in synthetic aperture digital holography has been explored by numerous groups [8][9][10][11][12][13], with the largest published aperture being 218 Mpix -a 50X increase in synthetic aperture size in 10 years.…”

Section: Synthetic Aperture Holographymentioning

confidence: 99%