Related Experiment Video
Updated: Jun 13, 2026
10:16
Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
Published on: February 8, 2014
Holographic interferometry of transparent media using light scattered by embedded test objects.
Applied Optics
|April 17, 2010
Summary
Holographic interferometry of transparent media doubles fringe order numbers and compresses fringe localization. This technique enhances tomographic reconstruction of aerodynamic density fields.
Area of Science:
- Optics and Photonics
- Optical Measurement Techniques
Background:
- Holographic interferometry is a powerful tool for measuring phase objects.
- Transparent media present unique challenges for fringe analysis due to light scattering.
Purpose of the Study:
- To analyze fringe formation and localization in holographic interferometry for transparent media.
- To investigate the impact of light scattering by embedded diffuse objects on interferometric measurements.
Main Methods:
- Theoretical analysis of fringe patterns in holographic interferometry.
- Modeling light propagation and scattering within transparent media.
- Investigating specific optical configurations for enhanced fringe analysis.
Main Results:
- Fringe order numbers are observed to double in the discussed configurations.
- The fringe localization region is translated and compressed by a factor of two.
- Demonstrated applicability to tomographic reconstruction of aerodynamic density fields.
Conclusions:
- The study provides a method to enhance fringe analysis in holographic interferometry of transparent media.
- The findings are crucial for accurate tomographic reconstruction of complex flow fields.
- This research advances optical metrology for transparent object characterization.
Related Concept Videos
01:05Total Internal Reflection Fluorescence Microscopy
Total internal reflection fluorescence microscopy or TIRF is an advanced microscopic technique used to visualize fluorophores in samples close to a solid surface with a higher refractive index, such as a glass coverslip. TIRF only allows fluorophores in proximity to the solid surface to be excited. When light from a medium with a lower refractive index (such as air) hits the glass coverslip at a critical angle, the light undergoes total internal reflection stead of passing through the glass.
01:26Phase Contrast and Differential Interference Contrast Microscopy
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...