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Updated: Jun 13, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Published on: February 8, 2014

Higher diffraction orders in on-axis holographic lenses.

R R Syms¹, L Solymar

¹University of Oxford, Department of Engineering Science, Parks Road, Oxford, OX1 3PJ, UK.

|April 17, 2010

Summary

This study analyzes holographic lenses formed in photographic emulsion. Numerical analysis of local diffraction efficiency shows reasonable agreement with experimental results for lens characterization.

Area of Science:

Optics and Photonics
Holography
Materials Science

Background:

Holographic lenses offer unique optical properties.
Characterizing their performance requires understanding local diffraction efficiency.
Photographic emulsion is a common medium for holographic recording.

Purpose of the Study:

To analyze the local diffraction efficiency of holographic lenses.
To develop a numerical method for predicting lens performance.
To compare numerical predictions with experimental measurements.

Main Methods:

Forming holographic lenses in bleached photographic emulsion.
Measuring local diffraction efficiency using a small-diameter probe beam.
Solving ordinary differential equations based on simplified grating vector assumptions for numerical analysis.

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Main Results:

Local diffraction efficiency into various orders was determined.
Numerical analysis using simplified assumptions yielded solvable differential equations.
Experimental results demonstrated reasonable agreement with the numerical model.

Conclusions:

The numerical approach provides a viable method for analyzing holographic lens performance.
Simplified assumptions in the model allow for practical computation.
Further refinement could enhance the accuracy of holographic lens characterization.