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Precalculation method using spherical basic object light for computer-generated hologram.

Kohei Hosoyachi¹, Kazuhiro Yamaguchi, Tsubasa Ichikawa

¹Graduate School of Information Science and Technology, Hokkaido University, N14, W9, Sapporo, Hokkaido 060-0814, Japan.

|January 8, 2013

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A new method for computer-generated holography uses spherical recording to halve data size and simplify calculations. This approach enhances holographic display efficiency and computational speed.

Area of Science:

Optics and Photonics
Computer Science
Digital Imaging

Background:

Computer-generated holography (CGH) relies on precalculation methods for efficient hologram generation.
Conventional methods transform precalculated object light in the spatial domain, facing computational complexity.

Purpose of the Study:

To propose a novel precalculation method for CGH that reduces data size and computational complexity.
To investigate the use of spherical surfaces for recording precalculated object light.

Main Methods:

Developed a novel method utilizing precalculated object light recorded on a spherical surface.
Represented transforms using homogeneous coordinates on the spherical surface.
Applied these representations to common transform operations.

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Last Updated: May 15, 2026

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Main Results:

Achieved a data size reduction by half compared to conventional methods.
Successfully addressed the calculation complexity inherent in traditional precalculation techniques.
Confirmed the method's effectiveness through optical image-reconstruction experiments.

Conclusions:

The proposed spherical recording method offers a significant improvement in CGH data storage and processing efficiency.
Homogeneous coordinate representations simplify transform operations, making CGH more computationally tractable.
The successful experimental validation demonstrates the practical viability of this novel approach.