Imagers refer to devices that are used to capture or record images in various applications such as photography, medical imaging, surveillance, and satellite imaging. These devices can be based on different technologies such as charge-coupled devices (CCDs), complementary metal-oxide-semiconductor (CMOS) sensors, and infrared sensors. Imagers can range from simple cameras in smartphones to sophisticated imaging systems used in scientific research. Researchers in this field focus on developing and improving imaging technology, enhancing image quality, increasing sensitivity, and reducing noise in images. They also explore new applications for imaging technology in fields such as medicine, astronomy, and environmental monitoring. Overall, the research area of imagers plays a crucial role in advancing imaging technology and its applications in various industries.