Gradient Refractive Index (GRIN) Liquid Crystal (LC) Lens for Correction of Focus and Astigmatism

The main two optical aberrations seen in any imaging system are defocus and astigmatism. Traditionally, the approaches to correct both aberrations utilize the mechanical movement of fixed power spherical and cylindrical lenses. In this report, we have proposed a non-mechanical, electrically tunable optical system that can provide both focus and astigmatism power correction with an adjustable axis. The concept device is comprised of stripe electrodebased gradient refractive index liquid crystal lens. Dynamic astigmatism and focus correction are demonstrated upon application of electric field on the designed device. Unlike complex, bulky, and curved shape lens systems, the proposed device is flat, low cost, and low voltage driven.