Carbon fiber tubes/pipes used for Astronomical telescope parts

The application of carbon fiber in astronomical telescopes is not only the carbon fiber barrel. In giant astronomical telescopes, carbon fiber tubes can also be used for mirror back frames. For example, the back frame of the Yangpajing Observatory's De Submillimeter Telescope, known as the "Eye of Space" in Tibet, is a space truss made of 162 carbon fiber tubes connected by 46 Invar bolt balls. This optimized structural design and material selection comprehensively considers thermal expansion (the thermal expansion coefficient of the entire back frame is zero) and stiffness, ensuring that the surface accuracy of the primary mirror remains within 10 μm (rms) under rated load and thermal cycle conditions. stability.