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Thursday, October 01, 2009
Sony Develops 240fps Single Lens 3D Camera


Sony today announced the development of a single lens 3D camera technology capable of recording 3D images of even fast-moving subject matter such as sports, at 240fps (frames per second).

This technology combines a newly developed optical system for single lens 3D camera which captures the left and right images simultaneously, together with existing high frame rate (HFR) recording technology to realize 240fps 3D filming.

Sony will demonstrate a prototype model incorporating this technology at "CEATEC JAPAN 2009", to be held at Makuhari Messe convention center in Chiba city, Japan, from October 6th.



In existing half mirror 3D camera systems with separate lenses for the left and right eyes, the parallax range is adjustable, enabling the depth of the 3D images to be modified . However, when operating the zoom and focus functions of such systems, the sensitivity of the human eye, in particular to differences in the size and rotational movement of dual images, as well as any vertical misalignment or difference in image quality has meant that complex technology has been required to ensure that each camera lens is closely coordinated, and there are no discrepancies in the optical axis, image size, and focus.

The introduction of a single lens system resolves any issues that may occur as a result of having different optical characteristics for each eye. Furthermore, by using mirrors in place of shutters, incoming light can now be simultaneously separated into left and right images and recorded as it reaches the parallel light area (the area where diverging light from the point of focus on the subject matter becomes parallel) of the relay lens. The separated left and right images are then processed and recorded with the respective left and right image sensors. As there is no difference in time between when the left and right eye images are captured, it is possible for natural and smooth 3D images to be captured, even of scenes involving rapid movement.

Optical tests have shown that a frame rate 240fps represents the limit of human visual perception, and beyond that it becomes difficult to detect differences in terms of blur and "jerkiness" of moving images (where images that were continuous are now seen as a series of distinct snapshots). By developing a 240fps frame rate CMOS image sensor with properties close to the human eye, which is capable of capture natural images of even fast moving subject matter, Sony has succeeded in further enhancing the quality of 3D video images.

The combination of Sony's new single lens 3D system and its 240fps high frame rate technology has realized a single lens 3D camera system, based on universal properties of the human eye, which enables natural and smooth 3D images with no accommodation-vergence conflict to be recorded.

Within the growing 3D cinema industry, Sony has supported and driven the expansion of 3D by providing a wide variety of professional equipment for the shooting, production and screening of movies in 3D. The number of digital 3D screens is increasing rapidly, and is expected to reach 7,000 worldwide by the end of 2009, according to Screen Digest.

Sony plans to deliver new 3D viewing experiences by bringing 3D to the home in 2010.



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