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Holographic point source for digital lensless holographic microscopy
Optics Letters, 2022A holographic point source (HPS) developed for digital lensless holographic microscopy (HPS-DLHM) is presented. The HPS is an off-axis phase transmission hologram of an experimental micrometer pinhole recorded on a photopolymer holographic film. An amplitude division interferometer, adjusted to operate at maximum diffraction efficiency, has been ...
Maria J. Lopera, Carlos Trujillo
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Photonic Crystal Fiber for High Resolution Lensless In-Line Holographic Microscopy
Optical Fiber Technology, 2020 We propose to use high numerical aperture single mode optical fibers like photonic crystal fiber for lensless in-line holographic microscopy. Highly divergent beam helps to overcome the spatial sampling limitation of the image sensor.
Pranab Kumar Dutta, Sanjeev Kumar
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Lensless Tomographic Microscopy on a Chip
Imaging and Applied Optics, 2011A lensless optical tomography platform is demonstrated for use in high throughput 3D imaging applications. Through the use of pixel super-resolution techniques in partially-coherent digital in-line holography and tomographic reconstruction, this computational microscope achieves
Serhan O. Isikman +6 more
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Lensless microscopy for shining light sources
Latin America Optics and Photonics Conference, 2014To characterize the distribution of emittance of a lighting source, we demonstrate a new microscopy technique that does not use any lens, and is not limited to any light power emission, neither to a small depth of field.
Ivan Moreno, Priscilla Castillo
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Clinical and Biomedical Applications of Lensless Holographic Microscopy
Laser and Photonics ReviewsAbstract Many clinical procedures and biomedical research workflows rely on microscopy, including diagnosis of cancer, genetic disorders, autoimmune diseases, infections, and quantification of cell culture. Despite its widespread use, traditional image acquisition and review by trained microscopists is often lengthy and expensive ...
Euan McLeod
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Common-path phase-shifting lensless holographic microscopy
Optics Letters, 2010We present an approach capable of high-NA imaging in a lensless digital in-line holographic microscopy layout even outside the Gabor's regime. The method is based on spatial multiplexing at the sample plane, allowing a common-path interferometric architecture, where two interferometric beams are generated by a spatial light modulator (SLM) prior to ...
Vicente, Micó, Javier, García
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Lensless microscopy technique for static and dynamic colloidal systems
Journal of Colloid and Interface Science, 2010We present the application of a lensless microscopy technique known as digital in-line holographic microscopy (DIHM) to image dynamic and static colloidal systems of microspheres. DIHM has been perfected up to the point that submicrometer lateral resolution with several hundreds of micrometers depth of field is achieved with visible light; it is shown ...
D C, Alvarez-Palacio +1 more
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Lensless Microscopy and Sensing on a Chip
Frontiers in Optics 2011/Laser Science XXVII, 2011We review our recent progress on computational lensfree on-chip microscopy and sensing approaches for high-throughput biomedical imaging and screening applications in field settings.
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Probe separation and noise suppression in lensless microscopy
Applied Physics B, 2019Lensless microscopy enables the recording of the image without the help of lens. However, it suffers from the undesired noise when the illumination is not uniform. Here, we present a novel technique to reconstruct both the illumination profile and the object in lensless microscopy based on what we call “separation method”.
Diyi Liu +5 more
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RGB digital lensless holographic microscopy
SPIE Proceedings, 2013The recent introduction of color digital lensless holographic microscopy (CDLHM) has shown the possibility of imaging microscopic specimens at full color without the need of lenses. Owing to the simplicity, robustness, and compactness of the digital lensless holographic microscopes (DLHM), they have been presented as the ideal candidates to being ...
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