Advices on Pixel size and detector resolution for night vision devices selecting

2019-08-20

A detector’s resolution is the first element in determining a camera’s ability to generate a high-quality image. The more detector elements (pixels) a detector has, the higher its resolution, therefore the more energy will be gathered, and the more detail you’ll be able to see in the image. Higher resolution IR cameras can detect smaller objects from farther away.

Pixel size is the one responsible for level of detail. Pixels are typically measured in micrometers, or “microns,” and smaller pixel sizes are better— the smaller the pitch, the more detail you’ll see.

Another fine point in detector design is fill factor (or density) – the space between pixels on the detector that has to be interpolated when the image is formed electronically. Higher pixel density results in a more detailed image.

The camera that produces higher quality images will outperform simpler cameras in such applications as:

Threat detection – better contrast and scene detail gives better edge differentiation, better segmentation, and better classification;

Long-range detection – small objects and small scene features have higher contrast and sharper edges, making them more readily recognizable at long ranges;

Inclement conditions – fog, smoke, and precipitation reduce thermal contrast; cameras with higher resolution will continue providing a superior image.

Be aware and don’t confuse detector resolution and display resolution because some manufacturers might boast about a high-resolution LCD while they might have a low-resolution detector.

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