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Calculation method of reflectance distributions for computer-generated holograms using the finite-difference

Tsubasa Ichikawa¹, Yuji Sakamoto, Agus Subagyo

¹Graduate School of Information Science and Technology, Hokkaido University, North 14 West 9, Sapporo-shi 060-0814, Japan. ichikawa@ist.hokudai.ac.jp

|December 24, 2011

Summary

This study introduces a novel method for calculating material reflectance distributions in computer-generated holograms (CGHs). The finite-difference time-domain method accurately simulates surface roughness effects, enhancing holographic realism.

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Area of Science:

Computational optics
Holography
Material science

Background:

Current computer-generated holograms (CGHs) lack realistic material textures.
Reflectance distribution in CGHs is an under-researched area.

Purpose of the Study:

To propose and validate a method for calculating reflectance distributions in CGHs.
To incorporate material textures into holographic simulations.

Main Methods:

Utilized the finite-difference time-domain (FDTD) method for simulation.
Analyzed reflected light from computer-generated uneven surfaces.
Applied simulated reflectance distribution as object light in CGHs.

Main Results:

Established a relationship between surface roughness and reflectance distribution.
Demonstrated the accurate application of reflectance distributions to CGHs via imaging simulation.
Successfully rendered material textures in CGHs.

Conclusions:

The FDTD method enables realistic simulation of reflectance distributions in CGHs.
This approach significantly enhances the visual fidelity of computer-generated holograms.
Future work can explore more complex material properties and surface interactions.