High-altitude lookout surveillance camera

A camera is a device that converts the light image of a scene into an electrical signal. Its structure can be roughly divided into three parts: optical system (mainly refers to the lens), photoelectric conversion system (mainly refers to the camera tube or solid-state imaging device) and circuit system (mainly refers to the video processing circuit). The main component of the optical system is the optical lens, which is composed of a lens system. This lens system consists of many different convex and concave lenses, where the center of the convex lens is thicker than the edge, so the light passing through the edge part of the lens is refracted more than the light passing through the center part. When the subject is refracted by the lens of the optical system, a "focus" is formed on the imaging surface of the imaging tube of the photoelectric conversion system or the solid-state imaging device. A photosensitive element in a photoelectric conversion system converts an optical image out of "focus" into an electrical signal that carries a charge. The role of these electrical signals is weak, and must be further amplified by the circuit system to form signals that meet specific technical requirements and output from the camera. The optical system is equivalent to the eyes of the camera and is closely related to the operation skills. The photoelectric conversion system is the core of the camera, and the camera tube or solid-state imaging device is the "heart" of the camera. Since most of the home video cameras integrate the video part and the video part, the working principle of the video part is outlined below. When the camera system in the camera converts the optical image of the subject into a corresponding electrical signal, the recorded signal source is formed. The video recording system converts the electrical signal sent by the signal source into a magnetic signal through the electromagnetic conversion system, and records it on the video tape. If the video recording system of the camera needs to play back the recorded signal, the relevant buttons can be manipulated to convert the magnetic signal on the video tape into an electrical signal, which is then amplified and sent to the TV screen for imaging. From the perspective of energy conversion, the working principle of the camera is a conversion process of light-electricity-magnetism-electricity-light.