Focal plane is one of the most important components of remote sensing camera

and we could obtain a long focal plane by means of interleaving assembly of TDICCD. As to the longer TDICCD focal plane

it is difficult for us to obtain precise measuring results through the conventional method. Monitoring the pixels of TDICCD directly

using an air rails (linearity less than 2 μ m / m) that carries microscopic system

get the space position of the pixels. Measuring 600 mm long focal plane

attain the accurate test results whose error is less than 3 μ m. According to the imaging test of remote sensing camera on ground

by the research and analysis of the image

the precision reflected from the image matches as that obtained from the accurate measurement. So it is proved that this method is precise and feasible and could achieve high-precision measurement of the long focal plane.