Quais são as categorias de lentes de vigilância? Quais são os principais componentes das câmeras de vigilância?

With the development of society, the advancement of science and technology, and people’s strong demand for security, surveillance cameras have become ubiquitous. As a component of surveillance cameras, lenses play a vital role in the surveillance system.

1、What are the categories of surveillance lenses?

Surveillance lenses can be divided into many types according to the required camera distance and viewing angle, mainly the following three types:

Prime lens

Because the focal length is fixed, the field of view of the fixed-focus lens cannot be changed after it is installed. According to the different focal lengths, there are wide-angle lenses, standard lenses and telephoto lenses.

They are suitable for occasions where the camera range is not required to be changed. They are usually used in fires, traffic accidents and other places that require fixed viewing angle monitoring.

Zoom lens

The focal length of the zoom lens can be adjusted, and the field of view can be switched between near and far as needed. The zoom lens can change the focal length in a wide range to obtain different fields of view.

It is suitable for scenarios where the monitoring area needs to be adjusted according to actual conditions, such as places with large demand changes or large monitoring areas.

The surveillance lens

Lente olho de peixe

The viewing angle of a fisheye lens can usually reach more than 180 graus, which can cover a large monitoring area. It is widely used in places that require wide-angle monitoring and real-time dynamic monitoring, such as large supermarkets, schools, parks, corridors, elevators, etc.

2、What are the main components of surveillance cameras?

In addition to the lens, a complete surveillance camera has several important components. Let’s take a look at its main components and working principles:

Lentes

The surveillance lens is an important component of the camera, which mainly realizes the adjustment of focal length and viewing angle. The type and parameters of the lens will affect the image clarity, campo de visão, and zoom capability.

Surveillance camera lens

Sensor de imagem

Image sensor is one of the core components of surveillance cameras, mainly used to capture real-time images of target areas. Common image sensors include CMOS and CCD technologies, which can convert visible light into electrical signals.

Data transfer and storage

Surveillance cameras are usually equipped with data transmission interfaces to transmit image and video data to monitoring systems or other devices for processing and storage, usually using wired or wireless technology to transmit data.

Camera housing

Camera housings are usually made of weather-resistant and protective materials to protect internal components from harsh environments, vibrations, and damage from objects.

Infrared light

Some surveillance cameras are also equipped with infrared lights, mainly to obtain clear images in low light or complete darkness. Infrared lights can emit infrared light and provide appropriate lighting conditions for the camera to shoot normally.