Figure 1. (IMAGE) Science China Press Caption Schematic of the spatial frequency loss in large spatial-frequency-shift microscopy without tunability. (a) Detected spatial frequency range when the spatial frequency of the illumination (denoted as 2feva.) is larger than two folds of the cutoff frequency of the objective. (b) Reconstructed images in large-spatial-frequency-shift condition with the missing band. feva.: the spatial frequency of illumination. NA: numerical aperture of obejctive. SFS: spatial-frequency-shift. Credit ©Science China Press Usage Restrictions Use with credit. 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.