迪奥科技标语
Which is better
Author:Administrator   Published in:2019-11-26 12:00

Image sensors are the core components of various industrial and monitoring cameras, portable video recorders, digital cameras, scanners, etc. this fast-growing market has now extended to the fields of toys, mobile phones, PDAs, automobiles and biology. With the rapid development of solid-state imaging applications in the 1970s and 1980s, CCD technology and manufacturing process have been optimized in terms of optical characteristics and imaging quality. In the last 25 years, CCD technology has been leading the trend of image sensor devices. It is a high-resolution and high-quality image sensor that can be integrated in a small chip. However, in recent years, with the rapid development of semiconductor manufacturing technology, the size of integrated transistors is getting smaller and smaller, and the performance is getting better and better. CMOS image sensors have been developing rapidly in recent years, which has a great potential to catch up. CMOS provides comparable performance with CCD in the middle and low-end application fields, but it has obvious advantages in price. With the development of technology, CMOS will also occupy a place in the high-end application fields. The following is a simple comparison of the two technologies. From a technical point of view, the following indicators are often used to evaluate the performance of image sensors:

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It can be seen from the above that CCD and CMOS image sensors have their own advantages and disadvantages. They are both competitive and complementary in the whole image sensor market. In some cases, the two sensors are complementary and can be used in different applications.

CCD provides good image quality, anti noise ability and flexibility in camera design. Although the external circuit increases the size and complexity of the system, it can be more flexible in the circuit design, which can improve the performance of CCD camera as much as possible. CCD is more suitable for the application fields that require very high camera performance and less strict cost control, such as astronomy, high-definition medical X-ray image, and other scientific applications that require long-time exposure and strict image noise requirements.

CMOS is a kind of image sensor which can be produced by the modern large-scale semiconductor integrated circuit production process. It has the characteristics of high yield, high integration, low power consumption and low price. CMOS technology is a technology that many image sensor semiconductor R & D enterprises in the world try to replace CCD. After years of efforts, CMOS, as an image sensor, has overcome many shortcomings in the early stage and developed to the level that it can compete with CCD technology in image quality. Now the level of CMOS makes them more suitable for applications requiring small space, small size, low power consumption and not particularly high image noise and quality requirements. For example, most of them have industrial detection applications of auxiliary lighting, security and security applications, and most of them are consumer commercial digital camera applications.

At present, CCD is still superior to CMOS in performance. However, with the continuous progress of CMOS image sensor technology, on the basis of its own advantages of integration, low power consumption and low cost, noise and sensitivity have been greatly improved, and the gap between CMOS image sensor and CCD sensor is constantly narrowing. Even some insiders believe that the future sensor market should be the world of CMOS. So, which sensor is more suitable for the industrial camera market? Or which sensor is more suitable for future needs?

Obviously, there is no way to answer the above questions. There are many problems to be considered when choosing a chip. The selection of industrial cameras should be based on the requirements of the machine vision system, and the selection of the machine vision system should be based on the requirements of the user's production inspection and condition monitoring. Therefore, for industrial cameras and machine vision systems, there is no saying that any kind of sensor is more powerful. Their technological progress will undoubtedly greatly promote the development of industrial camera market and machine vision industry.

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