| CPC G02B 26/06 (2013.01) [G02B 26/02 (2013.01); H01L 24/81 (2013.01); H01L 27/14618 (2013.01); H01L 27/14685 (2013.01); H01L 24/16 (2013.01); H01L 27/14649 (2013.01); H01L 2224/16238 (2013.01); H01L 2224/8113 (2013.01); H01L 2224/81132 (2013.01); H01L 2224/81169 (2013.01)] | 17 Claims |

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1. A window assembly comprising:
a transparent window layer; and
a first coded mask layer provided on a first surface of the transparent window layer, the first coded mask layer having a first shape configured to change a first property of light passing through the window assembly,
wherein the entire of the first surface is flat and the first coded mask layer is in direct contact with the first surface.
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