What is the difference between hemispherical camera, gun camera and spherical camera in security monitoring?

(1) Different shapes

The shape of the hemispherical camera is hemispherical, and the installation method is ceiling installation. It has its own exquisite protective cover and mounting bracket, and the bolt machine needs another protective cover.

The appearance of gun camera is similar to a long square or a long cylinder, and the installation method is wall-mounted with a bracket.

The spherical camera consists of an integrated camera, a spherical pan-tilt and a decoder. Installation methods include ceiling, hoisting and wall hanging.

(2) Different lenses

The hemispherical camera comes with a zoom lens, so the zoom range is generally small and the lens is not easy to replace.

The zoom range of gun camera depends on the selected lens, which can be several times to dozens of times, and the lens replacement is relatively easy.

The spherical camera can automatically focus, manually zoom, zoom in and out and rotate 360 degrees to monitor the area to be monitored. Generally, the lens has optical zoom of 10, 22, 23 and 35 times, and the irradiation distance is generally 50- 100 meters.

(3) Different application occasions

Hemispherical cameras are mostly used in indoor small-scale monitoring occasions: semi-public areas with no lights or dim lights, hotel corridors, government office buildings, hospitals, residential quarters, indoor halls and other places.

Gun cameras are generally installed in tunnels, factories or parking lots. Mainly used in underground warehouses, warehouses, monitoring urban roads, outdoor environment of residential quarters, etc. When monitoring only the position or motion of the scene, you can choose a gun camera.

Spherical cameras are generally used in outdoor or indoor situations with large area and wide range.

2. Introduction to the camera

The camera converts optical image signals into electrical signals for storage or transmission. When shooting an object, the light reflected by the object is collected by the camera lens and focused on the light receiving surface of the camera device, and then the light is converted into electric energy by the camera device, that is, a "video signal" is obtained. The photoelectric signal is very weak, so it needs to be amplified by pre-amplifier circuit and then processed and adjusted by various circuits. The final standard signal can be sent to video recorders and other recording media for recording, or spread through a propagation system, or sent to a monitor for display.