Image Reconstruction with Fraunhofer Holograms*

DeVelis, John B.; Parrent, George B.; Thompson, Brian J.

doi:10.1364/josa.56.000423

Cited by 65 publications

(15 citation statements)

References 11 publications

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“…The first approach is to recover E sca (x,z 1 ) in eqn (2). This is the digital version of the traditional holographic reconstruction method 58,59 and can be achieved by multiplying the reference field to the hologram and propagate the field at the distance z 1 2 z 0 . The algorithm is straight-forward.…”

Section: Digital In-line Holographymentioning

confidence: 99%

Optical imaging techniques in microfluidics and their applications

2012

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Microfluidic devices have undergone rapid development in recent years and provide a lab-on-a-chip solution for many biomedical and chemical applications. Optical imaging techniques are essential in microfluidics for observing and extracting information from biological or chemical samples. Traditionally, imaging in microfluidics is achieved by bench-top conventional microscopes or other bulky imaging systems. More recently, many novel compact microscopic techniques have been developed to provide a low-cost and portable solution. In this review, we provide an overview of optical imaging techniques used in microfluidics followed with their applications. We first discuss bulky imaging systems including microscopes and interferometer-based techniques, then we focus on compact imaging systems that can be better integrated with microfluidic devices, including digital inline holography and scanning-based imaging techniques. The applications in biomedicine or chemistry are also discussed along with the specific imaging techniques.

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Section: Digital In-line Holographymentioning

confidence: 99%

Optical imaging techniques in microfluidics and their applications

2012

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“…The off-axis geometry requires greater spatial coherence length than the on-axis geometry because a separate part of the beam must be used to illuminate the specimen. In our simplified geometry, the minimum diameter of the laser beam is 3£, and the spatial coherence requirement becomes y > 3by[l - (29) By applying the same argument that gave Eq. (18), we find the maximum volume in the off-axis geometry to be…”

Section: >1mentioning

confidence: 99%

“…Although the possibility of making x -ray holograms with Paper 1951 received Apr. 29,1983; revised manuscript received Aug. 4,1983; accepted for publication Aug. 18,1983; received by Managing Editor Aug. 31,1983. ® 1984 Society of Photo -Optical Instrumentation Engineers.…”

Section: Introductionmentioning

confidence: 99%

X-Ray Biomicroholography

Solem

Chapline

1984

Opt. Eng

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“…In an attempt to solve the twin image problem in the inline scheme, DeVelis et al recorded holograms of an object in the Fraunhofer-diffraction plane [6]. In Fraunhofer holography, the distances between the object and its conjugated image are so large, that the twin image is completely blurred out.…”

Section: Introductionmentioning

confidence: 99%

“…Two reconstruction schemes were used for phase retrieval from inline holograms: reconstruction from a single inline hologram and reconstruction from a defocus series according to [30]. 6 …”

Section: Introductionmentioning

confidence: 99%