Infrared camera: The visible light visible to human eyes is red, orange, green, blue-violet in order of wavelength from long to short. Waves shorter than the wavelength of violet light are called infrared rays, which are longer than the wavelength of red light. Human eyes cannot see infrared light. Because the digital camera uses the CCD to sense all the light, it causes the shot image to be very different from the image that we see with only the visible light. In order to solve this problem, the digital camera is equipped with an infrared filter between the lens and the CCD, its role is to block the infrared light from entering the CCD, so that the CCD can only sense the visible light, so that the image captured by the digital camera and our naked eye The images seen are consistent. At present, most infrared cameras use LED infrared light emitting diodes as the main material of infrared cameras.
The visible light visible to the human eye is arranged from long to short wavelengths, followed by red, orange, yellow, green, cyan, blue, and violet. The red light has a wavelength range of 0.62 to 0.76 μm, and the violet light has a wavelength range of 0.38 to 0.46 μm. (visible light, infrared, ultraviolet, etc.)
Infrared night vision, that is, in the night vision state, the digital camera will emit infrared light that people can not see to illuminate the object being shot, turn off the infrared filter, no longer block infrared rays from entering the CCD, infrared reflected by the object Into the lens for imaging, what we see now is an image formed by reflection from infrared rays, rather than an image formed by the reflection of visible light, that is, images that cannot be seen by the naked eye in the dark can be captured at this time.
In the television monitoring system project, infrared lamps were rarely used in the past. However, due to the increase in social crime rates, the role of infrared in night surveillance has become more prominent. Not only vaults, oil depots, armory, library of books, cultural relics, prisons It is adopted by other important departments and is also adopted in general monitoring systems. Even the residential area television monitoring project also uses infrared cameras. This shows that people's requirements for television monitoring system engineering become more and more standard and more and more. More and more important sites require 24-hour continuous monitoring.
The method of realizing night vision can use conventional visible light illumination, but this method not only cannot conceal, but also exposes the monitoring target even more. Covert night vision surveillance is currently using infrared camera technology. Infrared camera technology is divided into passive infrared camera technology and active infrared camera technology. PIR technology uses the principle of infrared emission from any object above absolute zero (-273°C). Since the human body and the heat emitting object emit strong infrared light, other non-heating objects emit weak red light. Therefore, special infrared cameras can be used for night monitoring. The passive infrared camera technology is not adopted in night vision systems due to high equipment cost and failure to reflect the surrounding environment. Active infrared camera technology utilizes specially designed "infrared light" to artificially generate infrared radiation, producing infrared light that cannot be seen by the human eye and can be captured by ordinary cameras, radiating "lighting" scenes and environments, using ordinary low-light-conversion CCD black-and-white cameras or using "daylight The color night-time automatic black and white "camera or" infrared low-light color camera "to feel the infrared light reflected from the surrounding environment, so as to achieve night vision.
The visible light visible to the human eye is arranged from long to short wavelengths, followed by red, orange, yellow, green, cyan, blue, and violet. The red light has a wavelength range of 0.62 to 0.76 μm, and the violet light has a wavelength range of 0.38 to 0.46 μm. (visible light, infrared, ultraviolet, etc.)
Infrared night vision, that is, in the night vision state, the digital camera will emit infrared light that people can not see to illuminate the object being shot, turn off the infrared filter, no longer block infrared rays from entering the CCD, infrared reflected by the object Into the lens for imaging, what we see now is an image formed by reflection from infrared rays, rather than an image formed by the reflection of visible light, that is, images that cannot be seen by the naked eye in the dark can be captured at this time.
In the television monitoring system project, infrared lamps were rarely used in the past. However, due to the increase in social crime rates, the role of infrared in night surveillance has become more prominent. Not only vaults, oil depots, armory, library of books, cultural relics, prisons It is adopted by other important departments and is also adopted in general monitoring systems. Even the residential area television monitoring project also uses infrared cameras. This shows that people's requirements for television monitoring system engineering become more and more standard and more and more. More and more important sites require 24-hour continuous monitoring.
The method of realizing night vision can use conventional visible light illumination, but this method not only cannot conceal, but also exposes the monitoring target even more. Covert night vision surveillance is currently using infrared camera technology. Infrared camera technology is divided into passive infrared camera technology and active infrared camera technology. PIR technology uses the principle of infrared emission from any object above absolute zero (-273°C). Since the human body and the heat emitting object emit strong infrared light, other non-heating objects emit weak red light. Therefore, special infrared cameras can be used for night monitoring. The passive infrared camera technology is not adopted in night vision systems due to high equipment cost and failure to reflect the surrounding environment. Active infrared camera technology utilizes specially designed "infrared light" to artificially generate infrared radiation, producing infrared light that cannot be seen by the human eye and can be captured by ordinary cameras, radiating "lighting" scenes and environments, using ordinary low-light-conversion CCD black-and-white cameras or using "daylight The color night-time automatic black and white "camera or" infrared low-light color camera "to feel the infrared light reflected from the surrounding environment, so as to achieve night vision.