Imaging systems and a method of generating an image. One example of an imaging system includes a detection subsystem including a focal plane array (FPA) coupled to a read-out integrated circuit (ROIC), the ROIC being configured to activate a portion of the FPA in a selected pattern during an integration period, an optical scanning subsystem including an optical source and a waveguide, the waveguide being configured to direct optical radiation generated by the optical source within a field of view of the detection subsystem and over an area of a scene, the portion of the FPA activated in the selected pattern corresponding to the area of the scene, and an adaptive polymer lens assembly positioned at an aperture of the imaging system shared by the detection subsystem and the optical scanning subsystem, the adaptive polymer lens assembly being configured to adjust an optical magnification of the scene.