The invention provides a telecentric off-axis three-mirror anastigmatic imaging
system with three coaxial reflectors at an angle of
field of view of 10 degrees, and belongs to the telecentric off-axis three-mirror anastigmatic imaging
system relating to the technical field of
space optics, aiming at providing the telecentric off-axis three-mirror anastigmatic imaging
system with three coaxial reflectors at the angle of
field of view of 10 degrees. The system is characterized by comprising a main mirror, a
secondary mirror, a third mirror and an aperture stop which are coaxial, wherein the
secondary mirror is placed on a reflecting
optical path of the main mirror, the third mirror is placed on a reflecting
optical path of the
secondary mirror, and the aperture stop is placed on the edge ofthe front surface of the secondary mirror; in order to realize telecentric image, the distance from the aperture to the third mirror is half length of the
radius of curvature to the top of the third mirror; in order to realize
wide field of view of 10 degrees, the secondary mirror is a convex spherical mirror, the main mirror and the third mirror are concave quadric surface mirrors; and the distance from the secondary mirror to the third mirror is more than half length of the image focus of the system. The system has a coaxial structure, can acquire rich ground
resource information amount, and has small difficulty in
processing and debugging.