Thermal inspection pixel and emissivity check

Defaults are an illustration: DJI Matrice 4T thermal camera (640 x 512, 12 um pixel, 45 degree diagonal view, DJI specs page, October 2026), a Jinko 144-cell module outline (2278 x 1134 mm, datasheet code F1-CN) and assumed temperatures. Replace them with your own. The temperature part uses the Stefan-Boltzmann law over all wavelengths and ignores the atmosphere, so it is an illustration, not a camera model. Enter numbers with a point or a comma as the decimal mark. Write 1000, not 1,000 or 1.000. The example camera's focus range is 5 m to infinity (DJI specs page), so distances under 5 m give a warning.

1. Resolution

Image width (pixels)

Image height (pixels)

Pixel pitch (um)

Diagonal field of view (degrees)

Camera-to-module distance (m)

Angle off the module normal (degrees)

Module length (mm)

Module width (mm)

Cell rows along the length

Cell columns along the width

Hot spot size, square side (mm)

Pixels wanted across the target

2. Emissivity and reflected temperature

Module surface, true (C)

Hot spot surface, true (C)

Glass emissivity, true

Emissivity set in camera

Reflected temperature, true (C)

Reflected temperature set in camera (C)