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Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope

Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope

Published on: April 7, 2014

Quantitative phase imaging using a partitioned detection aperture.

Ashwin B Parthasarathy¹, Kengyeh K Chu, Tim N Ford

¹Boston University, Department of Biomedical Engineering, 44 Cummington Street, Boston, Massachusetts 02215, USA.

|October 3, 2012

Summary

This summary is machine-generated.

We developed an achromatic phase imaging technique for transparent samples. This method uses standard microscopes for fast, quantitative phase reconstruction of cells and microlenses.

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Area of Science:

Optical Imaging
Microscopy Techniques
Biophysics

Background:

Quantitative phase imaging is crucial for analyzing transparent biological and micro-optical samples.
Existing methods often require specialized equipment, active elements, or are sensitive to polarization and wavelength.
There is a need for robust, adaptable, and efficient phase imaging techniques.

Purpose of the Study:

To present a novel, achromatic, and polarization-independent technique for quantitative phase imaging.
To demonstrate the adaptability of the technique to standard bright-field microscopes.
To enable high-speed, single-shot phase reconstruction.

Main Methods:

Utilizes extended source incoherent illumination.
Employs off-axis detection apertures for phase retrieval.
Requires no active optical elements.
Readily integrated with conventional bright-field microscopy setups.

Main Results:

Successfully reconstructed the quantitative phase of biological samples (cheek cells).
Demonstrated accurate phase retrieval for micro-optical components (microlens).
Achieved light-efficient, single-shot phase imaging.
Enabled phase imaging at camera-limited frame rates.

Conclusions:

The presented technique offers a simple, versatile, and effective approach for quantitative phase imaging.
Its achromatic and polarization-independent nature enhances robustness.
The method's compatibility with standard microscopes and high-speed capability make it valuable for various applications in cell biology and micro-optics.