Abbreviated Journal Title
MICROLENS ARRAY; FOCAL LENGTH; Optics
A variable-focus liquid lens using a transparent flat cell is demonstrated. The top substrate has an aperture which is sealed with a thin elastic membrane on the outer surface and the bottom aperture is sealed on the inner surface of the bottom substrate. By applying a pressure to the outer membrane inward causes the liquid to redistribute and swell the inner membrane outward which, in turn, forms a plano-convex lens. To prove principles, a water lens with 5 mm aperture was fabricated. The resolution is better than 25 1p/mm and the response time is similar to 40 ms. Potential applications of such a lens for real-time active imaging are emphasized.
Ren, Hongwen and Wu, Shin-Tson, "Variable-focus liquid lens" (2007). Faculty Bibliography 2000s. 7567.