The Space Astronomical Technology Laboratory (SATL) was established in 1999 for developing the Space Solar Telescope (SST). In recent years, SATL focuses on the design and development of optical synthetic aperture imaging and optical imaging stabilization.
The technique of optical synthetic aperture imaging is a promising solution of building large-aperture and high-resolution space telescopes while reducing theirvolume and mass, since it provides a method to break the diffraction limit for the single aperture optical imaging systems. It may have valuable application for astro observation, such as Earth-like extra-solar planets. In 2016, we built a 3-subapetures optical synthetic aperture imaging experimental system. Each sub-aperture has a diameter of 100mm. The Fizeau interferometric imaging is achieved with a wavelength range from 400 nm to 700 nm and a field of view of 2'. Now, we are setting up new optical synthetic aperture interference experimental systems by funding from National Key R&D program of China and other organizations.
As a core technology in high-resolution optical imaging system, the optical imaging stabilization is utilized to attenuate blur induced by image vibration or motion, so that the clear image can be acquired even in an unstable environment. We have been working on this technique for over 20 years, and have developed multiple prototypes. Now we have successfully applied the optical imaging stabilization into a space camera, which filled the gap of this technique in China.
We also have interests in the techniques of adaptive optics and vacuum ultraviolet spectroscopy.
Optical synthetic aperture imaging system
Observed images with wide bandwidth (550-650nm) point source from single aperture (left) and three apertures
Observed images with wide bandwidth (400-700nm) extended source from single aperture (left) and three apertures (right)