Lightweight structural design of space mirror

With the development of the resolution of spacebore remote sensor,the diameter of primary mirror is becoming larger and larger,and the influence of mirror microgravity and temperature is even more evident.Now the mirror lightweight design is becoming the key technology in the large mirror engineering application.The spacial mirror lightweight structure technology in the world is summarized roundly,and its actuality and trend are analyzed.Some fundamentals and new ideas during the lightweight design are provided.