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Mark Peters : January 31th 2008 - 02:00 CET updated

Sony 24 Megapixel CMOS image sensor


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SonySony 24 Megapixel CMOS : Sony announced the development of a 35mm full size 24.81 effective megapixel, ultra-high speed high image quality CMOS sensor designed to meet the increasing requirement for rapid image capture and advanced picture quality within DSLR cameras. In recent years, the demand for digital SLR cameras featuring high resolution and wide graduation ranges capable of capturing every detail of the subject matter has continued to increase, particularly among high-end amateur users. Additionally, the increasing user requirement to shoot from the same focal length and angle as 35mm film cameras using interchangeable lenses has led to significant interest in the development of 35mm, full size CMOS image sensors.
Sony 24 Megapixel CMOS image sensorSony CMOS 24 Megapixels - Develop
However, there are a number of technical challenges to developing full (large) size image sensors, such as the propagation delay caused by using extended power circuitry and signal lines, and the difficulty of maintaining uniform sensitivity and signal saturation across the surface of the screen. Furthermore, because current semiconductor exposure systems are unable to cover the entire chip surface of 35mm full size CMOS image sensors, multiple exposures are required. This results in the difficulty of accurately controlling exposure variance and matching circuit patterns.

Sony 24 Megapixel CMOS sensor - Advantages and Converter
The newly developed CMOS image sensor combines unique circuit design technology with Sony's advanced fabrication expertise, including a system of joining multiple exposed patterns together and advanced planarization for minimizing fluctuation, to realize 35mm, full size, 24.81 effective megapixel resolution. Sony's "Column-Parallel A/D Conversion Technique" also provides each column within the sensor with its own A/D converter, minimizing image degradation caused by the noise that arises during analog processing while at the same time delivering an extremely high signal conversion speed.

Sony Alpha

Sony 24 Megapixel CMOS image sensor - Resolution and Conversion
The enhanced image quality generated by the sensor's 24.81 effective megapixel resolution, wide range of graduation expression achieved by its full size broad dynamic range, and the low noise, high resolution, ultra-responsive performance provided by Sony's Column Parallel A/D Conversion technique enable it to meet the ever-increasing requirements within high performance digital SLR cameras. Sony will target for mass production of this CMOS image sensor within this year.

24MP Sensor

Sony 24MP image sensor features
• Column-Parallel A/D Conversion method" achieves high S/N and high-speed imaging
• CDS/PGA(24dB) Circuit (PGA: Programmable Gain Amplifier)
• 12bit-AD Converter on chip
• Diversified readout mode
• All-pixel scan mode 6.3 frame/s (12bit)
• Window readout
• High-speed digital output (12 channel parallel LVDS output)

24MP Image Sensor

Sony 24 Megapixels sensor details
• DeImage size Diagonal width: 43.3mm (Type 2.7)
• Total number of pixels: 6236(H) x 4124(V) approx. 25.72M pixels
• Number of effective pixels: 6104(H) x 4064(V) approx.24.81M pixels
• Number of active pixels: 6096(H) x 4056(V) approx.24.73M pixels
• 24MP Chip size: 41.0mm (H) x 31.9 mm (V)
• Unit cell size: 5.94um (H) x 5.94um (V)






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