Diffraction Characteristics Analysis of Cascaded Liquid Crystal Polarization Gratings

Li''na, 王丽娜 Wang; Mingqiu, 李明秋 Li; Chunyang, 王春阳 Wang; Hongwei, 史红伟 Shi; Qi-feng, 牛启凤 Niu

doi:10.3788/lop57.030501

Cited by 1 publication

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“…When the incident light is an L-circle-polarized light, S3′ = +1, all light is diffracted to −1 level, as shown in Figure 2b. When the LCPG is at a high voltage, the incident light is transmitted along the axis (zero-level diffraction direction), as shown in Figure 2c [11]. It is theoretically possible to achieve a single stage with a diffraction efficiency of 100%, in fact; however, due to the influence of error, experimentally it is not.…”

Section: Diffraction Characteristics Of Monolithic Liquid Crystal Pol...mentioning

confidence: 99%

“…The optical path difference between o light and e light can be expressed as follows [17]: The angle between the wave normal line of e-light and the optical axis of liquid crystal molecule is τ. According to the literature [11], the angle is obtained by using the coordinate analysis method, with the general expression for τ as follows:…”

Section: Tilt Incident Liquid Crystal Adjustable Phase Delayer Phase ...mentioning

confidence: 99%

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Optimal Control of Passive Cascaded Liquid Crystal Polarization Gratings

et al. 2023

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The incidence angle of a beam entering a liquid crystal variable retarder (LCVR) and the liquid crystal polarization grating (LCPG) is greater when the LCPG is utilized in the quadrature cascade, which reduces the diffraction efficiency. Therefore, this study investigates the best method for controlling a cascaded LCPG. By optimizing the control coefficient and the method for controlling the voltage of the LCVR, this study reduces the angle between the incident LCVR and the polarization grating, and increases the diffraction efficiency of the grating. It was confirmed that this strategy can increase the diffraction effectiveness of the quadrature cascaded LCPG through the design of the experimental setup.

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Section: Diffraction Characteristics Of Monolithic Liquid Crystal Pol...mentioning

confidence: 99%

Section: Tilt Incident Liquid Crystal Adjustable Phase Delayer Phase ...mentioning

confidence: 99%