Tell you a few measurements of the key parameters of the infrared detection system:
1, the size of the image element
Image element, also known as the "pixel" or "pixel point", is the composition of the smallest unit of the digitized image is a reflection of image characteristics. It is the key to reflecting the characteristics of the image. The pixel size refers to the actual physical size of each pixel and is a parameter that measures the size of the pixel. The pixel size determines the resolution and information content of a digital image. In the same environment, the pixel is small, the image resolution is high, and the amount of information is large; therefore, infrared thermal imaging equipment will generally pursue the miniaturization of the pixel size, which not only meets the industry demand for lightweight thermal imaging modules, integration, but also about the clarity of the image.
2, detector resolution
Familiar with the camera and other digital products, friends, the "resolution" will not be unfamiliar, which represents the degree of clarity of the image details, the higher the resolution, the more pixels contained in the imaging is more fine. The resolution of an infrared detector is the same, i.e. how many pixels it contains for thermal imaging. The higher the resolution, the more distant and smaller the target can be detected, and the higher the quality of the image.
3, field of view
Field of view (FOV) by the infrared optical lens to determine the distance and range of the infrared lens will form a field of view, the lens and the field of view of the height and width of the angle is called the "field of view", the larger the field of view, the infrared camera to capture the field of view is also the larger, the more content can be observed. The larger the field of view, the larger the field of view captured by the thermal imaging camera, and the more content it can observe.
4, spatial resolution
Spatial resolution refers to the infrared thermal imager to identify the target's spatial shape of the ability, usually mrad (milliradians) to indicate that the smaller the value, it is said to distinguish the target's spatial shape of the ability to be higher.
5, thermal sensitivity
Thermal sensitivity (NETD), that is, the noise equivalent temperature difference, refers to the infrared detector's output signal-to-noise ratio of 1, the target and the background of the difference in temperature, is an important measure of the sensitivity of infrared detector indicators. It is an important indicator of the sensitivity of an infrared detector. It is usually used as a proxy for the minimum temperature difference that the camera can distinguish. In general, the smaller the NETD value, the better the thermal sensitivity of the infrared system, and the higher the quality of the thermal image.
The above are key parameters for evaluating the performance of an infrared detector system, which can help you better understand the technical attributes of the camera, and avoid "stepping on the pits" when you are shopping.
These are the key parameters for evaluating the performance of a thermal imaging system.