17 February 2009 Stereo display with time-multiplexed focal adjustment
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Abstract
In stereo displays, binocular disparity creates a striking impression of depth. However, such displays present focus cues-blur and accommodation-that specify a different depth than disparity, thereby causing a conflict. This conflict causes several problems including misperception of the 3D layout, difficulty fusing binocular images, and visual fatigue. To address these problems, we developed a display that preserves the advantages of conventional stereo displays, while presenting correct or nearly correct focus cues. In our new stereo display each eye views a display through a lens that switches between four focal distances at very high rate. The switches are synchronized to the display, so focal distance and the distance being simulated on the display are consistent or nearly consistent with one another. Focus cues for points in--between the four focal planes are simulated by using a depth-weighted blending technique. We will describe the design of the new display, discuss the retinal images it forms under various conditions, and describe an experiment that illustrates the effectiveness of the display in maximizing visual performance while minimizing visual fatigue.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David M. Hoffman, David M. Hoffman, Philip J.W. Hands, Philip J.W. Hands, Andrew K. Kirby, Andrew K. Kirby, Gordon D. Love, Gordon D. Love, Martin S. Banks, Martin S. Banks, } "Stereo display with time-multiplexed focal adjustment", Proc. SPIE 7237, Stereoscopic Displays and Applications XX, 72370R (17 February 2009); doi: 10.1117/12.807170; https://doi.org/10.1117/12.807170
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