Anti-reflection type optical element of composite unit array structure and preparation method and application of anti-reflection type optical element

• Main Authors: ZHOU DONGZHAN, ZHENG JINGMING, YANG JINHUI, XU QIWEI, LI ZIJIN, FENG JICUN, LI QING, LI KAIYU, ZHOU YOU, LYU XUELIANG, ZHANG YANG
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention relates to an anti-reflection optical element of a composite unit array and a preparation method and application of the anti-reflection optical element. The optical element comprises a substrate and a microarray structure on the incident plane of the substrate. The substrate is made of a high-transmittance material in a wave band range of 800nm to 1500nm; the microarray structure is submicron-level recesses which are periodically and repeatedly arranged, each composite unit is formed by compositing a first recess and a second recess, the second recesses are distributed on the periphery of the first recess, the surrounding center of the second recesses coincides with the center of the first recess, and the composite unit microstructure array is in hexagonal close arrangement; and the center-to-center distance of the composite unit is 550nm to 750nm. The optical element has good permeability in the near-infrared band, and the submicron microarray pits are constructed on the incident surface of the