Infrared cameras can't go through walls to detect humans, but they can detect fires
A thermal imaging camera is a device that converts the invisible infrared energy emitted by an object into a visible thermal image.
The different colors on the top of the thermal image represent the different temperatures of the object being measured. By viewing the thermal image, the overall temperature distribution of the target under test can be observed, and the heat generation of the target can be studied so that the next step can be judged.
Modern thermal imaging cameras work by using optoelectronic devices to detect and measure radiation and establish a correlation between the radiation and the surface temperature. All objects above absolute zero (-273°C) emit infrared radiation.
The thermal imaging camera utilizes an infrared detector and an optical imaging objective to accept a graphical representation of the energy distribution of the infrared radiation from the target under test, which is reflected on the photosensitive element of the infrared detector, resulting in an infrared thermogram that corresponds to the heat distribution field on the surface of the object.
Extended information:
White light from the sun is broken down into seven types of light - red, orange, yellow, green, blue, and violet - after a prism.
In 1800, the English astronomer In 1800, the British astronomer Herschel published a paper announcing that there is a "hot line" outside the red light.
This is what we now call the infrared
line.
Infrared light is a kind of electromagnetic wave, its wavelength is generally between 0.75 microns to 1 millimeter. Scientists have studied, and according to the wavelength of infrared into near-infrared, mid-infrared and far-infrared, far-infrared, very far-infrared and other categories.
Natural objects, where higher than minus 273 degrees Celsius (i.e., absolute zero), will radiate infrared radiation to the outside world. Infrared is invisible to the human eye, but whether at night, or in the fog, the use of infrared technology made of instruments can detect such as the human body, fire and other heat sources.
The application of infrared thermography originated in the mid-20th century. The earliest were night vision devices used by the Nazi German army. After World War II, the U.S. company Texas Instruments developed the Flying Light Infrared Seeker (FLIR), an infrared imaging device also used by the military.
In the 1960s, Sweden's AGA developed an infrared thermal imager that not only searches for heat sources, but also determines their temperatures. Since then, the study of infrared thermal imaging technology has taken another leap forward.
China's infrared thermal imaging technology has also developed. Guangzhou SAT Power Infrared Technology Co., Ltd. is China's first specialized in infrared thermal imaging technology research, development and production of high-tech enterprises. Infrared thermal imager is sometimes like a small camera, mounted on the roof of the car, you can patrol along the high-voltage lines, long-distance determination of the temperature of the line to prevent fire.
As for the grain, cotton and coal piled up in the warehouse, it is more difficult for the human eye to find hidden dangers, and the infrared thermal imager is capable of determining how high the temperature of the targeted parts is. If a fire does break out and firefighters enter the scene wearing gas masks, they will be hampered by the smoke and often find it difficult to locate the source of the fire and the people who are trapped.
The infrared thermal imager can help solve this problem. Now, the application of infrared thermography has been extended to the medical field. This is because inflammation, tumors or blocked blood vessels somewhere in the human body can affect the heat balance. Through the instrument can detect the abnormal parts, the doctor will use this as a scientific basis for judging the disease.
One hospital tested 276 women of childbearing age and found that the temperature of one of the breasts of four women was higher than that of the surrounding area by more than 1 degree Celsius, which was suspected of having breast cancer. The diagnosis was made by clinical pathology with 100 percent accuracy.
People's Daily Online-Modern Fire Eyes --- Talking about Infrared Thermal Imaging Technology