OPTICAL SHEET, OPTICAL UNIT AND LIGHTING DEVICE USING THE SAME

摘要

The present invention relates to an optical sheet or an optical unit used for a lighting device. In particular, the present invention provides an optical sheet comprising a plurality of lens patterns formed on a base member, where SAG (height H: lens diameter R) of the lens pattern ranges from 0.01 to 0.3. The present invention provides an optical sheet which minimizes total reflection by adjusting SAG of a lens pattern formed on a base member, thereby realizing a high-brightness lighting device.