In the context of the ongoing trends in "Industry 4.0" and "Made in China 2025," industrial automation is continuously gaining momentum, with machine vision emerging as a key area within the electronics industry. Driven by increasing automation demands, social security needs, and strong market forces, the global machine vision and intelligent transportation system market is experiencing significant growth. In China, an increasing number of large companies are entering the machine vision sector, signaling a shift towards more advanced and automated solutions.
Image sensors play a crucial role in machine vision systems, as they are responsible for capturing image data. Key performance indicators for image sensors include resolution, sensitivity, bandwidth, noise, power consumption, optical format, frame rate, and CRA (Camera Response Angle). No single technology fits all applications, so designers must choose the most suitable option based on their specific requirements. CCD sensors offer excellent image uniformity, high linear dynamic range, and superior light sensitivity, while CMOS sensors provide flexibility, low power consumption, high frame rates, and better integration.
In the application market, Full Frame CCDs are commonly used in scientific and medical fields, while Interline Transfer CCDs and global shutter CMOS sensors are widely adopted in machine vision and intelligent transportation systems. Linear CCDs are ideal for scanning applications, such as in the food and beverage industry, whereas rolling shutter CMOS sensors are typically used in surveillance systems. Both CCD and CMOS technologies are evolving toward smaller pixel sizes, larger optical formats, improved output designs, and enhanced quantum efficiency to meet growing demands for higher resolution, faster speeds, lower noise, and reduced costs.
ON Semiconductor stands out as the only supplier offering both CMOS and CCD image sensors. With over four decades of imaging expertise and the acquired technologies from companies like Cypress, TrueSense, and Aptina, ON Semiconductor has become a leading provider in the market. In 2015, it held the largest market share in the security and scanning image sensor sectors and ranked second in the machine vision market. The company’s comprehensive product portfolio includes a wide range of technologies, from CCD and CMOS pixel design to back-illuminated sensors, electronic multipliers, system-on-chip (SoC) integration, dedicated color filter arrays (CFAs), high-speed readout architectures, proprietary coprocessors, and custom design capabilities. Pixel sizes range from 1.1 μm to 24 μm, resolutions go up to over 50 megapixels, and optical formats span from 2.2 mm to over 70 mm. ON Semiconductor continues to invest heavily in future technologies and market development.
This article focuses on ON Semiconductor's global shutter CMOS image sensor series, PYTHON, and its Interline Transfer CCD image sensor. These products are designed for high-end industrial applications, including inspection systems, license plate recognition, surveillance, scientific research, traffic cameras, robot guidance, and motion analysis.
The PYTHON series offers superior image quality, high and flexible readout speeds, and low-power versions that cater to demanding industrial and intelligent transportation applications. Its patented global shutter structure ensures no motion artifacts when capturing moving objects, while correlated double sampling (CDS) minimizes output noise. On-chip fixed pattern noise (FPN) correction enhances image clarity, and the design is configurable to optimize performance for different end-use scenarios. High quantum efficiency allows excellent sensitivity across UV to NIR wavelengths, and the sensors are available in black and white, color, and near-infrared options.
For customers seeking to reduce power consumption and cost, ON Semiconductor also provides low-power variants like the PYTHON 1300 and PYTHON 5000. These models reduce power usage by 33% while maintaining high optical performance, making them a cost-effective choice for applications that do not require high frame rates.
The PYTHON series supports high bandwidth, enabling compatibility with modern interfaces such as USB3, USB3.1, 10GigE, and Cameralink. The ROI (Region of Interest) mode allows for custom output selection, and the speed increases quadratically when using windowed outputs. This makes the series highly adaptable for various applications requiring fast and accurate image capture.
The PYTHON family consists of nine devices, offering resolutions ranging from VGA to over 25 megapixels in three package sizes. All devices share similar electrical and design requirements, ensuring consistency across the product line. This scalability reduces design time and accelerates time-to-market, making it easier for developers to implement customized solutions tailored to specific application needs.
With its support for high bandwidth beyond USB3, the PYTHON series delivers faster frame rates without compromising image quality. The 25-megapixel resolution aligns with the market trend toward higher resolution, and the availability of nine different resolution options allows for greater flexibility in meeting diverse customer requirements.
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