Figure 2 (IMAGE) Osaka University Caption Experimental layout: phase grating and filtering in the Fourier plane of the 4f system. (a) vertical phase grating (conventional method), (b) virtual diagonal phase grating (new method). Credit © 2019 Nakata Y. et al., Scientific Reports. 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.