In order to apply space camera to the measurement in large field of view and high resolution

the technique of optical assembly with several CCDs is discussed. Its principle

methods of adjusting and testing as well as the structure of focal plane are described. The assembly with three TDI CCDs is finished on the facility which is composed of a long work-distance microscope and a precise X-Y rail

using the method in which the beam-spliter and the mechanical adjusting are applied. The measuring error is less than one third pixel

the optical assembly has the advantages of simple constitution

low cost and good adaptability.