What is day-night confocal? As an optical technique, day-night confocal is mainly used to ensure that the lens maintains a clear focus under different lighting conditions, namely day and night.

This technology is mainly suitable for scenes that need to operate continuously under all-weather conditions, such as security monitoring and traffic monitoring, requiring the lens to ensure image quality in both high and low light environments.

IR corrected lenses are special optical lenses designed using day-night confocal techniques that provide sharp images both day and night and maintain uniform image quality even when light conditions in the environment are very variable.

Such lenses are commonly used in surveillance and security fields, such as the ITS lens used in the Intelligent Transportation System, which uses day and night confocal technology.

1、The main features of IR corrected lenses

(1) Focus consistency

The key feature of IR corrected lenses is their ability to maintain focus consistency when switching spectra, ensuring that images always remain clear whether illuminated by daylight or infrared light.

The images always remain clear

(2) Has a broad spectral response

IR corrected lenses are typically optically designed and made of specific materials to handle a broad spectrum from visible to infrared light, ensuring that the lens can obtain high-quality images both during the day and at night.

(3) With infrared transparency

In order to maintain effective operation in night-time environments, IR corrected lenses usually have good transmittance to infrared light and are suitable for night use. They can be used with infrared lighting equipment to capture images even in no-light environments.

(4) Has automatic aperture adjustment function

The IR corrected lens has an automatic aperture adjustment function, which can automatically adjust the aperture size according to the change of ambient light, so as to keep the image exposure right.

2、Main applications of IR corrected lenses

The main application scenarios of IR corrected lenses are as follows:

(1) Security surveillance

IR corrected lenses are widely used for security surveillance in residential, commercial and public areas, ensuring that security surveillance within 24 hours is not affected by changes in light.

The application of IR corrected lens

(2) Wildlife observation

In the field of wildlife protection and research, animal behavior can be monitored around the clock through IR corrected lenses. This has many applications in wildlife nature reserves.

(3) Traffic surveillance

It is used to monitor roads, railways and other transportation modes to help manage and maintain traffic safety, ensuring that traffic safety management does not fall behind whether it is day or night.

Several ITS lenses for intelligent traffic management independently developed by ChuangAn Optics (as shown in the picture) are lenses designed based on the day-night confocal principle.

ITS lenses by ChuangAn Optics