Figure 2 | Electrical ON/OFF switching and efficiency improvement using a continuous-phase Fresnel lens. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | Electrical ON/OFF switching and efficiency improvement using a continuous-phase Fresnel lens.

Caption

Figure 2: Far-field focal-plane images showing a strong focus at 0 V and suppression of the focus at high voltage. Comparison with a binary Fresnel lens of equal size demonstrates approximately 2× higher focal intensity for the continuous-profile design.

Credit

Zhiyu Xu et al.

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CC BY

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