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Speed dome
The dome (ceiling) camera is a common type of CCTV camera used indoors and outdoors. Its motorized version, which pans and zooms, is called a speed dome or PTZ. The CCTV camera is also known by the names The CCTV camera bubble camera and ceiling camera. This type of The CCTV camera is dome-shaped. You can mount it on a room ceiling or anywhere else. This camera comes in two models: night vision (IR) and standard.
In IR models, around the lens of theThe CCTV camera a set of LEDs is installed. A light-sensitive sensor turns these LEDs on and off. When the light level drops, this sensor switches the LEDs on. Lens CCTV dome is fixed in low-cost models, varifocal in mid-range models and motorised in high-end models.
Some CCTV domes have a metal chassis and are somewhat impact-resistant; these are known as CCTV (vandal-proof) domes. For complete protection against water ingress, dust, impact and vandalism, these CCTV are placed inside special covers called housings (colloquially, "hoozing"). Expensive housings can even withstand blows from a sledgehammer or hammer for a certain time. Factory models that come with a housing cover are marked with the code H. CCTV domes with a plastic chassis are designed for indoor spaces and office and home environments. CCTVmotorized dome is called a Speed Dome or PTZ. These cameras usually have a zoom lens and rotate quickly to different angles.
There are two ways to install The CCTV camera domes:
The CCTV camera ceiling models have several features: a cover to protect the The CCTV camera . It also has backlight compensation (BLC/WDR); it adjusts brightness automatically, so very bright or very dark scenes are easier to see.
The main advantage of these cameras is their dark-tinted lens, which makes it impossible to tell whether the The CCTV camera is recording or not.
These CCTV are widely used in banks, homes, lobbies, museums, shops and all kinds of workplaces.
CCTV dome cameras, because they are mounted on the ceiling, are not very suitable for detailed surveillance, especially with high ceilings. The reason is that these cameras always capture images from directly or nearly directly above. In that case, they usually capture only the subject's hair or at best a profile, which in most cases is not useful. Only with a low ceiling (or mounting point) do they give a good image of the subject's face. This type of CCTV can be mounted on a wall with some modification, but the result will never be satisfactory.
1) Lower price than other types
2) Small, so-called compact dimensions
3) Attractive and suitable for places with a distinctive design
4) A housing (bubble) that itself acts as protection for the lens and The CCTV camera as well.
1) They are less effective than other types at deterring theft. (Some people still do not recognise them as a The CCTV camera when they see them.)
2) The viewing angle is vertical or near-vertical, so in most cases the subject is captured only in profile.
A speed dome camera is built for surveillance and security. Its zoom lens and fast rotation give you a wide view of the area. But some tasks need a camera built for image processing. License plate reading and particle image velocimetry are among them.
RasaAndishan area scan cameras are designed for exactly these machine vision applications. They support external triggering. With them, you can see the blades of a fan spinning at 4000 rpm as if they were standing still. To learn more, see the Image processing camera page. The Closed-circuit television article on Wikipedia is also a good overview of security cameras.