Off-axis TMA optical system

both long focal length and wide-field

can be optimized for optical system of zero distortion

low-field curvature.Off-axis TMA optical system well meet the requirements for optical system of surveying and mapping

therefore recognized for development of aerospace remote mapping camera.This paper gives the present status and development trend of foreign aerospace mapping camera

and discusses the problems of off-axis TMA optical system used in mapping

such as the definition of camera inner orientation elements

correction of focal length calculation formula

focusing mode effect of camera principal point position accuracy

system distortion calibration

system stability

and other discussions.