Fig. 5. (Color online) Measured illuminance of the LGP according to the etched shapes (a) Unetched A-type, (b) B-type etched in the shape of a square, (c) C-type etched in a curved shape.

New Phys.: Sae Mulli 2022;72:475~480 https://doi.org/10.3938/NPSM.72.475

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