"Light and Shadow" is a series of conceptual timepiece, including Refraction, Sun Dial and Reverb. Playing with the essential and fundamental elements before clock appear, the light and shadow condensed in your hand.

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Refraction is one of the series, by adopting the refraction of light when passing through the prism, light bend into angle direction. Controlling the direction of beam and angle of the prism, hands of hour and minute can be indicated