Tracking of micrometer-sized objects with high-numerical aperture lensless digital holographic microscopy

2012 ◽  
Author(s):  
John F. Restrepo ◽  
J. Garcia-Sucerquia
Keyword(s):  
Numerical Aperture ◽  
Digital Holographic Microscopy ◽  
High Numerical Aperture ◽  
Holographic Microscopy

scholarly journals High numerical aperture holographic microscopy reconstruction with extended z range

2015 ◽  
Vol 54 (32) ◽  
pp. 9540 ◽  
Author(s):  
N. Verrier ◽  
D. Donnarumma ◽  
G. Tessier ◽  
M. Gross
Keyword(s):  
Numerical Aperture ◽  
High Numerical Aperture ◽  
Holographic Microscopy

Super-Resolution Imaging in a Close-Packed Synthetic Aperture Digital Holographic Microscopy

2013 ◽  
Vol 404 ◽  
pp. 490-494
Author(s):  
Han Yen Tu ◽  
Yueh Long Lee ◽  
Chau Jern Cheng
Keyword(s):  
Imaging Technique ◽  
Numerical Aperture ◽  
Super Resolution ◽  
Experimental Results ◽  
Synthetic Aperture ◽  
Digital Holographic Microscopy ◽  
Superresolution Imaging ◽  
Resolution Imaging ◽  
Holographic Microscopy ◽  
Beam Rotation

This work presents a close-packed synthetic aperture method for superresolution imaging in digital holographic microscopy. The superresolution imaging technique is based on beam-rotation approach to collect the different bandpass spectrum of the sample. The close-packed information from synthetic aperture process can be used to enhance the reconstructed imaging resolution under low-numerical-aperture microscope objective. Simulated and experimental results show the characteristics of the close-packed synthetic aperture and the influence on superresolution imaging.

scholarly journals Adaptation of the Standard Off-Axis Digital Holographic Microscope to Achieve Variable Magnification

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 264
Author(s):  
Xin Fan ◽  
John J. Healy ◽  
Kevin O’Dwyer ◽  
Julianna Winnik ◽  
Bryan M. Hennelly
Keyword(s):  
Numerical Aperture ◽  
Field Of View ◽  
Digital Holographic Microscopy ◽  
Proof Of Concept ◽  
Finite Set ◽  
Sample Position ◽  
Small Set ◽  
Holographic Microscopy ◽  
Micro Lens Array ◽  
Future Work

Traditional microscopy provides only for a small set of magnifications using a finite set of microscope objectives. Here, a novel architecture is proposed for quantitative phase microscopy that requires only a simple adaptation of the traditional off-axis digital holographic microscope. The architecture has the key advantage of continuously variable magnification, resolution, and Field-of-View, by simply moving the sample. The method is based on combining the principles of traditional off-axis digital holographic microscopy and Gabor microscopy, which uses a diverging spherical wavefield for magnification. We present a proof-of-concept implementation and ray-tracing is used to model the magnification, Numerical Aperture, and Field-of-View as a function of sample position. Experimental results are presented using a micro-lens array and shortcomings of the method are highlighted for future work; in particular, the problem of aberration is highlighted, which results from imaging far from the focal plane of the infinity corrected microscope objective.

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