| 摘要 |
An optical element according to the present invention is an optical element including: a first light transmitting layer having a first sawtooth blazed surface 10, the first light transmitting layer including a plurality of first light-transmitting slopes 12 defining a first blaze angle alpha; and a second light transmitting layer having a second sawtooth blazed surface 20 including a plurality of second light-transmitting slopes 22 defining a second blaze angle beta, the second light transmitting layer being in contact with the first sawtooth blazed surface 10 of the first light transmitting layer. A tilting direction of the first light-transmitting slope 12 and a tilting direction of the second light-transmitting slope 22 are opposite.
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