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However, the wall plug efficiency (WPE) of DUV LEDs is relatively low for these applications, which is due to the low light extraction efficiency (LEE) yielding limited light output from LED package.

We present a novel method for the geometric calibration of micro-lens-based light field cameras. Accurate geometric calibration is the basis of various applications. Instead of using sub-aperture ...

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These lenses usually slide forward and back, giving you the option of a small, focused spotlight (the forward position) or a wider, diffused area light (the back position).