Time-division achromatic imaging method for a liquid crystal lens

We demonstrate a feasible time-division achromatic imaging method to improve image quality. We investigate the dependence of focal length on wavelength, which presents as the chromatic aberration when imaging. Next, by changing the driving voltages, color lights are tuned to have the same focal length and focused on the same point. The image of each light is obtained by digital image processing, and the chromatic aberration corrected image is also obtained. The experiments show this method has indeed improved the image quality, providing, to our knowledge, a new and effective solution for correcting the chromatic aberration of an imaging system using a liquid crystal lens.