CMOS is short name for Complementary Metal Oxide Semiconductor.It is a technology used in large-scale integrated circuit chips, a readable and written RAM chip on a computer mother board.W

With the different type sensor development，The CMOS was originally used to save data from the BIOS settings on a computer motherboard, only used to store data. In the field of digital imaging, CMOS has been developed as a low-cost sensor technology. Most of common digital products on the market use CMOS.The CMOS manufacturing process is applied to make the photosensitive elements of digital image equipment, which is to transform the function of pure logical operation into receiving external light into electricity, and then convert the obtained image signal into digital signal output through the analog / digital converter (A / D) inside the chip.

Security monitoring is inseparable from the acquisition of visual information, and relies heavily on image sensors. It is also one of the emerging industries with a rapidly growing CMOS image sensor market. In the past five years, the application of security video surveillance in the world has been gradually extended from developed countries to developing countries, and the overall scale has maintained rapid development. In the domestic market, the attention of governments at all levels to security construction in recent years has made China the world’s largest security video surveillance product manufacturing place and one of the most important security monitoring markets in the world. The domestic security market demand for security monitoring products including CMOS image sensor is also extended from first-tier cities To second-and third-tier cities and rural areas.

From a technical point of view, CCTV surveillance system upgrade from analog camera, HD-CVI/HD-TVI camera, to network output camera; from fixed lens normal camera to long range zoom camera；from 2Mp to 4MP, 4K camera. Also, the application is much widely from home and city camera to army defense PTZ camera.  In this process, the complexity of the video surveillance system has been gradually improved, and the performance requirements for CMOS image sensors have been also constantly upgraded. Higher requirements for CMOS image sensors in low-illumination camera, HDR, HD / ultra HD imaging, intelligent recognition and other imaging performance are put forward.

Now sony just released SWIR sensor, with 5um unit cell size, IMX990 and IMX991,we will release SWIR camera too in the near future.