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Tunable-focus liquid crystal Fresnel zone lens based on harmonic diffraction
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10.1063/1.4769090
/content/aip/journal/apl/101/22/10.1063/1.4769090
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/22/10.1063/1.4769090
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Proposed TFLCFZL. (a) Phase profile of a harmonic diffractive lens. (b) Structure of the TFLCFZL with harmonic diffractive lens.

Image of FIG. 2.
FIG. 2.

Fabrication procedure of the TFLCFZL. (a) Coating UV curable prepolymer and stamp making. (b) Structure copy by UV imprinting. (c) Sputtering conductive layer. (d) Assembling TFLCFZL.

Image of FIG. 3.
FIG. 3.

Portion of three dimensional image of the 12 levels harmonic diffractive lens.

Image of FIG. 4.
FIG. 4.

POM images of the TFLCFZL at (a) V = 2.4 Vrms, (b) V = 4.0 Vrms. The LC cell is sandwiched between two orthogonal polarizers.

Image of FIG. 5.
FIG. 5.

Diffraction efficiency of a 2 mm-diameter TFLCFZL at three focus lengths 45.8 mm, 30.5 mm, and 22.1 mm, respectively. Illumination wavelength is 632.8 nm.

Image of FIG. 6.
FIG. 6.

Images taken from different image planes of the TFLCFZL by employing different focal lengths. (a) F −1 = 45.8 mm, V = 7.2 Vrms, (b) F 0 = 30.5 mm, V = 4.8 Vrms, (c) F 1 = 22.1 mm, V = 3.4 Vrms.

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/content/aip/journal/apl/101/22/10.1063/1.4769090
2012-11-29
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable-focus liquid crystal Fresnel zone lens based on harmonic diffraction
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/22/10.1063/1.4769090
10.1063/1.4769090
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