Recording and reconstruction of digital Gabor hologram

Qu, Weijuan; Chee, Oi Choo; Yu, Yingjie; Asundi, Anand

doi:10.1016/j.ijleo.2009.11.004

Cited by 7 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the simulated holograms, the agreement between the input and the measured optic paths was within 2% for spheres and 2% to 4% for thin rods. This suggests that twin image effects on phase images are not as serious as previously suggested [7]. The reason for this is the long distance between twin and real image for PSDIHM with light waves with the typical SOD used for high resolution imaging [1,6].…”

Section: Discussionmentioning

confidence: 55%

“…The simplicity of DIHM, and, in particular, of PSDIHM, makes it of great interest to determine to what extent accurate optic path measurements on micrometer-sized objects are possible with PSDIHM. A theoretical and experimental analysis of PSDIHM hologram recording and reconstruction was recently published by Qu et al [7]. The authors suggested that because of twin-image problems that can arise in PSDIHM, phase reconstructions do not represent the quantitative phase delay induced by the specimen.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative phase and refractive index measurements with point-source digital in-line holographic microscopy

et al. 2012

View full text Add to dashboard Cite

Point-source digital in-line holographic microscopy with numerical reconstruction is ideally suited for quantitative phase measurements to determine optical path lengths and to extract changes in refractive index within accuracy close to 0.001 on the submicrometer length scale. This is demonstrated with simulated holograms and with detailed measurements on a number of different micrometer-sized samples such as suspended drops, optical fibers, as well as organisms of biological interest such as E. coli bacteria, HeLa cells, and fibroblast cells.

show abstract

Section: Discussionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 99%

Quantitative phase and refractive index measurements with point-source digital in-line holographic microscopy

et al. 2012

View full text Add to dashboard Cite

show abstract

“…1, a spherical wave of wavelength λ emitting from a point source, illuminates an object, typically a distance a few thousand wavelengths from the source, and forms a highly magnified diffraction pattern on a screen much farther away. The diverging spherical wave can provide a geometrical magnification as compared with plane wave illumination [7] , as shown in Fig.…”

Section: Digital In-line Holographic Microscopymentioning

confidence: 99%

Capability enhancement in compact digital holographic microscopy

Wen

Wang

et al. 2015

SPIE Proceedings

Self Cite

View full text Add to dashboard Cite

A compact reflection digital holographic microscopy (DHM) system integrated with the light source and optical interferometer is developed for 3D topographic characterization and real-time dynamic inspection for Microelectromechanical systems (MEMS). Capability enhancement methods in lateral resolution, axial resolving range and large field of view for the compact DHM system are presented. To enhance the lateral resolution, the numerical aperture of a reflection DHM system is analyzed and optimum designed. To enhance the axial resolving range, dual wavelengths are used to extend the measuring range. To enable the large field of view, stitching of the measurement results is developed in the user-friendly software. Results from surfaces structures on silicon wafer, micro-optics on fused silica and dynamic inspection of MEMS structures demonstrate applications of this compact reflection digital holographic microscope for technical inspection in material science.

show abstract

“…Recently, we demonstrated the suitability of digital holography for bacteria characterization [ 20 ]. This technique may be also useful for the examination of other biological samples [ 21 – 24 ]. Optical holography is a method that allows registration and reconstruction of both the amplitude and the phase of an optical field.…”

Section: Introductionmentioning

confidence: 99%

“…The simplest configuration is represented by digital in-line holographic microscopy (DIHM). This concept is based on a technique originally proposed by Gabor under the assumption of light scattering on an in-line illuminated object [ 21 – 23 ]. In this case, the interference occurs when the amplitude of the scattered wave is small compared with the amplitude of the non-scattered reference wave.…”

Section: Introductionmentioning

confidence: 99%

Novel Perspectives on the Characterization of Species-Dependent Optical Signatures of Bacterial Colonies by Digital Holography

Buzalewicz¹,

Kujawińska²,

Krauze³

et al. 2016

PLoS ONE

View full text Add to dashboard Cite

The use of light diffraction for the microbiological diagnosis of bacterial colonies was a significant breakthrough with widespread implications for the food industry and clinical practice. We previously confirmed that optical sensors for bacterial colony light diffraction can be used for bacterial identification. This paper is focused on the novel perspectives of this method based on digital in-line holography (DIH), which is able to reconstruct the amplitude and phase properties of examined objects, as well as the amplitude and phase patterns of the optical field scattered/diffracted by the bacterial colony in any chosen observation plane behind the object from single digital hologram. Analysis of the amplitude and phase patterns inside a colony revealed its unique optical properties, which are associated with the internal structure and geometry of the bacterial colony. Moreover, on a computational level, it is possible to select the desired scattered/diffracted pattern within the entire observation volume that exhibits the largest amount of unique, differentiating bacterial features. These properties distinguish this method from the already proposed sensing techniques based on light diffraction/scattering of bacterial colonies. The reconstructed diffraction patterns have a similar spatial distribution as the recorded Fresnel patterns, previously applied for bacterial identification with over 98% accuracy, but they are characterized by both intensity and phase distributions. Our results using digital holography provide new optical discriminators of bacterial species revealed in one single step in form of new optical signatures of bacterial colonies: digital holograms, reconstructed amplitude and phase patterns, as well as diffraction patterns from all observation space, which exhibit species-dependent features. To the best of our knowledge, this is the first report on bacterial colony analysis via digital holography and our study represents an innovative approach to the subject.

show abstract

Recording and reconstruction of digital Gabor hologram

Cited by 7 publications

References 16 publications

Quantitative phase and refractive index measurements with point-source digital in-line holographic microscopy

Quantitative phase and refractive index measurements with point-source digital in-line holographic microscopy

Capability enhancement in compact digital holographic microscopy

Novel Perspectives on the Characterization of Species-Dependent Optical Signatures of Bacterial Colonies by Digital Holography

Contact Info

Product

Resources

About