Qingquan Zheng, Chunyang Wang, Zishuo Wang, Zeng Wang, Ding Kang. Research on diffraction characteristics of liquid crystal polarization grating under oblique incidence[J]. Infrared and Laser Engineering, 2022, 51(7): 20210511
- Infrared and Laser Engineering
- Vol. 51, Issue 7, 20210511 (2022)
Fig. 1. (a) Molecular arrangement of liquid crystal without driving voltage; (b) Molecular arrangement of liquid crystal at driving voltage
Fig. 2. Distribution of liquid crystal molecular inclination angle at different voltages
Fig. 3. (a) Vertical incident beam model；(b) Beam oblique incident model
Fig. 4. Relation diagram between incident light vector and pointing vector
Fig. 5. Relationship between oblique incident angle, voltage and +1 diffraction efficiency
Fig. 6. (a) Vertical incident; (b) Oblique incident −10°; (c) Oblique incident +10°
Fig. 7. (a) +1 order diffraction efficiency; (b) 0 order diffraction efficiency
Fig. 8. Schematic diagram of the experimental device
Fig. 9. (a) Light spot pattern of +1 under vertical incidence; (b) Light spot pattern of +1 at 5° incidence; (c) Light spot pattern of +1 at 10° incidence
Fig. 10. Experimental verification
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Table 1. Corresponding relationship between driving voltage and diffraction efficiency when the beam is incident at 0°-10°
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Table 2. Corresponding relationship between driving voltage and diffraction efficiency when the beam is incident at −10°-0°
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