New technology in the zoom lens (1)

Zoom lens development

In recent years, with national forest fire management, railway, maritime and oil field monitoring demand increasing, on long focal length, and variable power electric demand of the lens is at an all-time high, zoom lens as an important part in video surveillance equipment plays a crucial role.

Monitoring range needs from extend hundreds meters to a few thousand meters. With the needs of the lens is also increasing, from 100mm, 300mm to 750mm, or even longer, making original monitoring points you need to configure multiple short focal lens programmes gradually eliminated. As the focal length of extension, the practical application of exposed, product upgrades and features innovative to the agenda.

However, because of the zoom lens of development encountered resistance from various aspects, such as the natural limitations, restrictions and other equipment, so only the continuous improvement of products and increase usability features, in order to ensure that customer requirements are fulfilled.

We all know, the zoom lens used for outdoor environments, and because of our vast, across multiple climate zones, subject to many limitations of the natural environment, such as fog, high temperature or low temperature, etc. Whereas the application of long focal length lens, such as the General decoder, head precision have failed to meet the increasingly demanding requirements, at the same time, the focal length of growth also makes control focus became the operator of a major operation. In addition, we also found that, although the camera features an increasingly rich, but it still cannot change in the environment of areas frequently flexible settings.

New technology to solve problems in the development of the lens

Faced with so many environmental impact and application of resistance, the zoom lens manufacturers must cope with.

Low temperature environment

General shots of the lowest working temperature is minus 10 degrees, but in the Northern cold weather environments below this temperature may exist in such an environment to work into the lens manufacturers need to face difficult problems.

In response, some manufacturers have improved the product and in a professional laboratory for testing, allows the lens to minus 20 ° c environment and stable operation, to ensure that the lens product to completes its work low environment. Through the fog

In the forest, sea surface, the environment, the air has a large amount of water vapour, water vapor condensation in contract with the heat when small drops of liquid formation, the formation of fog.

While conventional video monitoring equipment in mist will lose its place, especially in the Misty spring, video monitoring the impact of security measures is greatly reduced. Thus, through the fog lens, broke the deadlock in foggy environment restrictions.

Through the fog lens needs and through the fog camera kit to get very good results, a strength of the manufacturers are looking for your lens to your camcorder, is more simply create their own technical parameter modulation of camera products, the camera can be through the fog for telephoto lens is optimized for multiple aspects, making substantial results observed.

Auto-focus

Previously mentioned the focal length of growth makes control focus became the operator of a major operation.

But in the early days of short Coke products (100mm following), monitoring distances up to only a few hundred meters. As a result of monitoring a shorter distance, as long as your camera and lens focus, it almost does not need to be focused on the monitoring objects, but as the focal length up to today, monitoring 750mm range has been extended to several kilometres, in such a long vertical distance to focus action became a very difficult thing. At the same time, the angle of each change in a pan, you will need to focus on the screen, increased workload but also lead to clear the screen gets the obstacles. In response, some manufacturers introduced the auto-focus series products, making complicated focusing work gone. Next, we'll look at how the auto-focus for increased monitoring and control efficiency:

· The screen changed: when the screen as long as they are moving, you need to focus, autofocus lens focusing operations can be executed automatically, so that the whole picture stays clear, such as images of people from far and near, lens autofocus function will continue to analyze the current screen and focused so that people in the screen always remains clear status;

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