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State-of-the-art Sony Pregius S pixel technology

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Sony Pregius S 4th Generation CMOS sensors

The Sony Pregius S 4th generation of Backside Illuminated CMOS sensors is a pixel design capable of powering a new generation of machine vision cameras for use in a wide range of vision systems. This new technology has been deployed in JAI's new GO-X family which includes 24 models including 12 with CoaXPress interface and 12 with GigE Vision (1000BASE-T).

How does Pregius S Technology benefit industrial camera users?
• Backside illumination for better sensitivity
• Global Shutters to eliminate motion distortion
• Small pixels provide high resolution in compact sensor formats
• Range of aspect ratios to fit application requirements
• Additional on-sensor circuitry for advanced functionality

Backside illumination for better sensitivity

Backside Illumination (BSI) is a sensor design that allows light to be captured via the back of the photodiodes – hence the term "Backside Illumination." This process of capturing light contrasts with traditional "frontside illuminated" sensor designs where wiring and circuitry are located on the layer above the photodiode and so partially blocking light.

The "S" in Pregius S stands for "stacked" and in the Pregius S design the wiring and circuitry layers are stacked below the photodiodes.

A recent increase in sensors designed using BSI technology provides evidence that when photodiodes are closer to the microlenses a wider angle of incidence for capturing incoming light is created. Consequently, with the wider sensing angle and no wiring circuitry getting in the way, BSI pixels are more sensitive than traditional frontside illuminated pixels.

Global Shutters to eliminate motion distortion

Sony's BSI technology has previously only been available in sensors with rolling shutters. The Pregius S series combines BSI technology with global shutters to allow users to capture crisp, undistorted images in any application.

Small pixels provide high resolution in compact sensor formats

The 2.74 µm pixel size means that cameras which use the Pregius S sensor can incorporate higher resolutions into smaller sensor sizes – meaning more pixels per square-millimeter of silicon. This means the sensors carry a lower cost-per-megapixel, and this saving gets passed along in the lower camera cost. Smaller sensors means less glass in the lens and so reduces lens cost as well. Smaller pixels typically means lower sensitivity, however the BSI technology makes up for this so that the sensitivity of Pregius S sensors is equal to or even better than larger pixel sensors.


Range of aspect ratios



Additional on-sensor circuitry for advanced functionality
Gradation compression: For scenes containing a few very bright areas, this function lets the camera capture a full 12-bits of shading variations but compresses the output into 8-bit images to increase frame rates and decrease file sizes. Users can define how much compression to apply and where on the 12-bit scale it should begin.

Floating diffusion binning: In addition to 1x2, 2x1, and 2x2 binning performed on the camera's FPGA, JAI's monochrome Pregius S cameras offer 2x2 binning performed directly on the sensor. This "FD2x2 Binning" mode utilizes a readout strategy that combines the readout of four pixels through a single floating diffusion node. This not only lowers the readout noise for higher dynamic range and image quality, it also produces significant increases in frame rate over the FPGA-based binning modes.


Features of JAI GO-X series:
• Small size, light weight, and low power consumption
• Cleanroom assembly and internal membranes to prevent dust migration
• Proven manufacturing process for high reliability in the field
• All the usual features in JAI cameras like region-of interest (ROI), image flipping, image mirroring, blemish compensation and shading correction. Plus, more advanced features like two different sequencer modes and JAI's automatic level control function (ALC).
Advanced Features
• Xscale - a flexible, sub-pixel scaling function to help match pixel sizes, optical formats, and resolutions when replacing older cameras. Binning allows the addition of whole-pixels, Xscale allows the addition of fractions of pixels and so offers much greater flexibility.
• Xpress - available in the new monochrome GigE Vision models, this function provides lossless compression to reduce data size and increase frame rates over standard GigE Vision bandwidths.
Gradation Compression - For scenes containing a few very bright areas, this function lets users capture a full 12-bit of shading variations but compress the output into 8-bit images to decrease file sizes. Users can define how much compression to apply and where on the 12-bit scale it should begin.
• Colour Space Conversion - The colour models offer a colour space conversion function when using the in-camera 5x5 RGB debayering option. This lets users select what colour gamut works best for their needs. Choices include RGB, Adobe RGB, HSI, CIE XYZ, and a colour matrix circuit that lets users program their own custom RGB format.
• Colour Enhancement - The colour models also include a function that can be used to increase the intensity of selected primary/complementary colours (red, green, blue, cyan, magenta, yellow) up to 2X their captured intensity.
Key specifications
• Resolutions from 5.1 to 24.5 megapixels
• CoaXPress, GigE Vision interfaces or 5GBASE-T models.
• Sony Pregius S CMOS imagers with global shutters and backside illumination (BSI) technology
• Small but sensitive pixels (2.74 µm square pixels)
• New functions for sub-pixel image scaling (Xscale), GigE Vision compression (Xpress), and more…

Need a price or more application information? Please email Adept Turnkey or call our offices
Adept Turnkey Pty Ltd is "The Machine Vision and Imaging Specialists" and distributor of JAI products in Australia and New Zealand. To find out more about any JAI product, please call Adept Turnkey at Perth (08) 9242 5411 / Sydney (02) 9905 5551 / Melbourne (03) 9384 1775 or contact us online.



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