Views: 0 Author: Site Editor Publish Time: 2022-07-05 Origin: Site
The thermal camera is now divided into two main categories, portable and fixed. They are devices that collect images and infrared data, which are then transferred to a computer and analyzed by specialist software to produce the infrared images we see. Depending on the lens, we can see different infra-red images. The software can also be set up to give us the image we want. For example, the infrared night vision camera does not see red and yellow, but black and white. Let's take a look at the thermal camera and how it works. Here are some answers.
Here is the content list:
Introduction to thermal camera.
The principle of thermal camera.
The thermal camera uses a camera that "sees" heat rather than light. Sometimes referred to as "FLIR" cameras, they produce images that use the temperature of an object rather than its visible properties to depict it. So how does thermal imaging see heat? All objects with a temperature above absolute zero (-273°C/-459°F) emit infrared radiation at MWIR and LWIR wavelengths (3 µm -14µm) in an amount proportional to the temperature of the object. Thermal imaging focuses and detects this radiation and then converts the temperature change into a greyscale image, using brighter and darker shades of grey to indicate hotter and cooler temperatures, thus visually representing the heat distribution of the scene. Many thermal camera can also apply color profiles to these images, for example showing hotter objects as yellow and cooler objects as blue, to make it easier to compare temperatures in the images.
Thermal camera uses an infrared detector, an optical imaging objective, and an optical machine scanning system to receive a graph of the infrared radiation energy distribution of the object under test reflected on the photosensitive element of the infrared detector. into electrical signals, which are amplified and processed, converted, or standard video signals are displayed on the infrared thermal image through a TV screen or monitor. All objects that are not at absolute zero emit different wavelengths of electromagnetic radiation. The higher the temperature of the object and the more intense the thermal movement of molecules or atoms, the stronger the infrared radiation. The spectral distribution or wavelength of radiation is related to the nature of the object and its temperature. The quantity that measures the magnitude of an object's ability to radiate is called the radiation coefficient. Objects that are black or have a darker surface color have a large radiation coefficient and are more radiant; objects that are bright in color or have a lighter surface color have a small radiation coefficient and are less radiant.
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