Figure 3 | Discrete varifocal switching between focal lengths of 24 mm and 48 mm in a four-pi wrapped lens. (IMAGE)

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

Figure 3 | Discrete varifocal switching between focal lengths of 24 mm and 48 mm in a four-pi wrapped lens.

Caption

Figure 3: A four-pi wrapped phase profile provides two voltage-addressable focal states (24 mm at 0 V and 48 mm at 2.1 V), and an OFF state at higher voltages; example imaging demonstrates the ability to switch focus without mechanical motion.

Credit

Zhiyu Xu et al.

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