Module Parameters - Resolution

Infrared thermal imaging resolution: the number of pixels - the actual number of pixels in the video output.

Mainstream pixel size: 256 × 192, 384 × 288, 640 × 512, 1280 × 1024, 1920 × 1080 Module parameters - resolution.

Infrared thermal imaging resolution: the number of pixels - the actual number of pixels in the video output.

Mainstream pixel size: 256 × 192, 384 × 288, 640 × 512, 1280 × 1024, 1920 × 1080.

Module Parameters - Pixel Pitch

Pixel pitch: distance from the center of a pixel to the center of a neighboring pixel.

pixel fill factor: ratio of area contributing to absorption to total pixel area.

Advantage of large pixels: large thermal film area, high fill factor, high sensitivity.

Advantages of small image element: high resolution, long detection distance, large face array miniaturization.

Trends: small image element, large face array, high sensitivity.

Module Parameters-NETD

NETD(Noise Equivalent Temperature Difference), Noise Equivalent Temperature Difference.

NETD is used to indicate the infrared detector signal-to-noise ratio of 1 corresponding to the target temperature difference, can be regarded as the infrared detector can distinguish the smallest temperature difference, the unit is mK.

The value of NETD is related to the F number of the lens, the integration time of the detector and the operating temperature. Therefore, when giving the value of NETD, it is necessary to label the test conditions.

Noise Equivalent Temperature Difference NETD <40mK (@f/1.0,50Hz,300K).

If the temperature difference between the target and the background environment is very small, a camera with a small NETD will show a clearer image with more detail.

A camera with a small NETD presents the target with higher contrast and visibility, resulting in better image quality.

Module Parameter-FPS

FPS (Frames Per Second), working frame rate, indicates the number of transmitted image frames per second.

The output frame rate of uncooled detectors is mainly limited by the thermal time constant, which cannot be infinitely large.

Usually the thermal time constant needs to be controlled at about 50% of the frame interval, and the thermal response time needs to be controlled at about 10ms for detectors operating at 50Hz.