Cutting-edge IT & Electronics Comprehensive Exhibition CEATEC JAPAN 10th AANIVERSARY
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CEATEC JAPAN 2009 October 6-10, 2009 Makuhari Messe
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240 Frames/sec. Monocular 3D Camera Prototype

Sony exhibited technology developed for a 240 frames/sec. monocular 3D camera at their CEATEC JAPAN 2009 booth

Combined monocular 3D lens optical system and high frame-rate filming technology

This system combines the simultaneous recording of left and right optical images for 3D images through a single lens with high frame-rate technology (HFR comfort-3D). The 3D theater at CEATEC JAPAN featured 3D images of a coastline viewed from the air, high-clarity images of the sea surface, and footage of FIFA/JFA soccer matches taken by this system.

A display technology with properties close to that of human perception

Sony has recognized that at 240 frames per second or above it is difficult for the human eye to detect flickering in moving images. The high frame-rate image sensors and 240 frames per second make it possible to create more natural looking and higher quality 3D images even for scenes that contain intense and rapid movement. The camera in this system works by splitting the image from the main lens with half mirrors to create stereoscopic images that are fed to the image sensors, enabling both the left and right images to be recorded simultaneously and under the same conditions. This method differs from a shutter system where unsatisfactory results can occur when stereoscopic image sensors are not properly synchronized with each other when moving images are recorded.

Realizing a more comfortable 3D experience with the single lens

As part of the demonstration, focus was adjusted from the foreground to background on images actually taken with the 3D camera to prove there is no loss of 3D effect and that the images retain their natural look. Another appealing point was the absence of shaking in the visual lines during scene changes.

Normal human vision is sensitive to differences in stereoscopic image size, rotation, vertical alignment, etc. and conventional 3D technology requires that two lenses are very precisely linked for zoom and focus operations as errors in precision will cause the resulting 3D images to be uncomfortable to watch. Sony's new system resolves these focus, size and optical axis issues since the light beams only pass through one lens. That means there is no need for complex controls and incoming light can be processed with minimal parallax error (differences between the left and right images) thanks to the single optical system.

What's more, since the amount of parallax error falls within the acceptable limits of human perception for blurriness, when images recorded with this system are viewed without polarized glasses they appear as ordinary 2D images. Viewers at the demonstration were also invited to remove the 3D glasses and experience this for themselves.


Sony Corp