Thermal imaging night vision goggles are an observation tool that uses infrared thermal imaging technology to convert the invisible infrared energy emitted by an object into a visible thermal image. The following is a detailed introduction to it:
Working principle: Any object will emit infrared radiation as long as its temperature is higher than absolute zero. The infrared detector of the thermal imaging night vision goggles can capture these infrared radiations and convert them into electrical signals. After signal processing and photoelectric conversion, the thermal image of the object is finally presented on the display screen. Objects of different temperatures will be displayed in different colors or grayscales in the thermal image, which helps users clearly distinguish the target object from the background environment, as well as the temperature difference between the various parts of the target object.
Structural composition
Optical system: It is composed of infrared objective lenses, etc. Its main function is to filter out infrared rays in the bands that the detector does not need, and focus the infrared rays in the required bands on the detector to achieve convergent imaging of the thermal radiation of the scene.
Infrared detector: It is the core component of thermal imaging night vision goggles. It is responsible for converting the infrared radiation transmitted and gathered by the infrared objective lens into electrical signals. Its performance directly affects the imaging quality and detection capability of thermal imaging night vision goggles. Indicators such as thermal sensitivity and resolution are closely related to infrared detectors.
Signal processing circuit: amplifies, filters, corrects and processes the electrical signal output by the infrared detector to improve the quality and stability of the signal. It can also enhance and reduce noise on the image to make the thermal image clearer and more intuitive, which is convenient for users to observe and analyze.
Display device: usually an LCD screen or other types of display screens, which are used to convert the processed electrical signal into a visible thermal image for users to observe. Some thermal imaging night vision goggles can also be connected to external devices, such as mobile phones and computers, to transmit thermal images to a larger screen for display and analysis.
Power supply system: provides power support for various components of thermal imaging night vision goggles, generally powered by batteries to ensure its portability and flexibility.
Performance characteristics
Good concealment: It is a passive detection device that does not need to emit any light or energy, but only receives infrared radiation emitted by the target object itself, so it is not easy to be discovered by the enemy. It has good concealment and allows operators to observe and monitor more safely and effectively.
Strong detection capability: It can work normally in completely dark nights, rain, snow, fog and other adverse weather conditions. It is not affected by the absorption of visible light and near-infrared rays by the atmosphere, smoke and clouds, etc. It has a long range and can be observed outside the range of enemy defense weapons.
Can identify camouflage: Ordinary camouflage is mainly based on preventing visible light observation, while thermal imaging night vision goggles are imaged by detecting the infrared thermal radiation of the target object. The temperature and infrared radiation of targets such as human bodies and vehicles are generally much greater than the temperature and infrared radiation of backgrounds such as grass and trees. Therefore, the target is not easy to camouflage or misjudged.
Can monitor all day: Infrared radiation is the most widely existing radiation in nature. Thermal imaging night vision goggles use the "atmospheric window" band of infrared rays to truly monitor target objects 24 hours a day, without worrying about the impact of changes in light conditions on the monitoring effect.
Intuitive display of temperature field: It can simultaneously measure the temperature of each point on the surface of an object, intuitively display the temperature field on the surface of the object, and display it in the form of an image, which helps users quickly find heat sources or abnormal temperature areas, rather than just displaying the outline or shape of the object.
Application fields
Military field: It can be used for reconnaissance, surveillance, aiming, navigation and other tasks, helping soldiers to find enemy targets, identify camouflage, and conduct precise shooting at night or in bad weather conditions. It can also be used for night vision and fire control systems of aircraft, ships, tanks and other weapon platforms to improve the combat effectiveness of weapons and equipment.
Security monitoring: In the field of security, it can be used for perimeter defense, video surveillance, intrusion detection and other aspects. It can monitor the activities of personnel and vehicles in real time, and effectively detect abnormal situations even in darkness, bad weather or with obstructions, and issue alarms in time to ensure the safety of personnel and property.
Outdoor adventure: In outdoor adventure and camping activities, thermal imaging night vision goggles can help users observe the surrounding environment and detect potential dangers in advance, such as wild animals, cliffs, gullies, etc. It can also be used to find lost companions or pets to ensure the safety and smoothness of outdoor activities.
Industrial detection: It can be used to detect faults and hidden dangers of electrical equipment, mechanical equipment, buildings, etc. By observing the temperature distribution on the surface of the equipment, it can timely detect problems such as overheating, overload, short circuit, etc., so as to carry out repairs and maintenance to avoid equipment damage and accidents.
Medical diagnosis: In the medical field, thermal imaging night vision goggles can be used to detect the temperature distribution on the human body surface and assist in the diagnosis of some diseases, such as tumors, inflammation, vascular diseases, etc., because these diseases usually cause changes in the temperature of local human tissues, which can be intuitively displayed through thermal imaging technology.