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High-resolution, High-speed, Three-dimensional Video Imaging with Digital Fringe Projection Techniques

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3-D computer-generated movies using a varifocal mirror.

¹Bell Telephone Laboratories, Murray Hill,New Jersey 07974, USA.

|January 14, 2010

Summary

This study details using a varifocal mirror for autostereoscopic 3-D movies, achieving 15 volumetric images per second. Analytical and experimental methods enabled near-linear image scans for improved 3-D display.

Area of Science:

Optics and Photonics
Computer Graphics
Display Technologies

Background:

Autostereoscopic imaging enables 3-D viewing without glasses.
Varifocal mirrors offer a dynamic method for depth control in displays.
Previous methods faced challenges in achieving linear depth scanning for 3-D content.

Purpose of the Study:

To describe the application of varifocal mirror autostereoscopic imaging for 3-D computer-generated movies.
To investigate methods for achieving linear time scans of image volumes for even depth distribution.
To address the nonlinear relationship between mirror displacement, driving voltage, and image position.

Main Methods:

Utilizing a high-speed movie projector and an oscillating varifocal mirror.

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Implementing linear time scans for image volume distribution along the depth axis.

Conducting analytical and experimental investigations to analyze system nonlinearities.

Main Results:

Achieved projection of moving autostereoscopic images at 15 volumetric images per second.
Identified nonlinearities in image position relative to mirror displacement and driving voltage.
Attained approximately linear scans for image volume distribution at duty cycles approaching 90%.

Conclusions:

Varifocal mirror technology is applicable to 3-D computer-generated movies.
Addressing nonlinearities is crucial for uniform depth representation in autostereoscopic displays.
High duty cycle operation of the varifocal mirror system can yield approximately linear depth scans.