Abstract

We present a method to record near-infrared (NIR) hologram at high spatial resolution. This method up-converts the NIR holograms to visible holograms taking advantage of the photo-induced phase transition characteristic of vanadium dioxide (VO2) material, and subsequently, the visible holograms are recorded by a high-resolution visible CMOS sensor. Obviously the pitch of visible sensor is much smaller than NIR sensors, so our method can extremely increase the recording resolution of NIR holograms. The experiments demonstrate the effectiveness of our method. Our method can improve the viewing angle of NIR holography to observe large-scale objects and shorten the observation distance so that the application area of NIR holography is expanded. It has the potential to become a more effective NIR hologram recording method.

© 2015 Optical Society of America

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