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Imaging properties of microlens arrays for integral imaging system

When designing a system capable of capturing and displaying three-dimensional (3-D) moving images in real time by the integral imaging (II) method, one challenge is to eliminate pseudoscopic images. To overcome this problem, we propose a simple system with an array of three convex lenses. This paper first describes by geometrical optics the lateral magnification of the elemental optics and expansion of an elemental image, confirming that the elemental optics satisfies the conditions under which pseudoscopic images can be avoided. By the II method, adjacent elemental images must not overlap, a condition also satisfied by the proposed optical system. Next, the paper describes an experiment carried out to acquire and display 3-D images. The real-time system we have constructed comprises elemental optics array with 54(H) x 59(V) elements, a CCD camera to capture a group of elemental images created by the lens array, and a liquid crystal panel to display these images. The experiment results confirm that the system produces orthoscopic images in real time and so is effective for real-time application of the II method.