CAD Model (IMAGE) The Chinese University of Hong Kong Caption Researchers have developed a system that increases the imaging speed of two-photon microscopy up to three to five times without compromising resolution. On the left is a CAD model of the compact, custom built, two-photon microscopy system. The free-space optics inside are pictured on the right. Credit The Chinese University of Hong Kong Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.