研究目的
To demonstrate a reflective chirped polarization volume grating as a strong contender for wide field-of-view augmented reality display systems.
研究成果
The chirped polarization volume grating possesses 54(cid:1) angular bandwidth, over 80% average efficiency, and 95% peak efficiency, making it a strong contender for see-through near-eye displays.
研究不足
The measured diffraction efficiency is about 10% lower than the simulated one due to sophisticated LC alignment including horizontal sub-wavelength period and vertical gradient period.
1：Experimental Design and Method Selection:
The study introduces gradient pitch along the beam propagation direction to extend the angular bandwidth.
2：Sample Selection and Data Sources:
The mixture consisting of UV dye, chiral agent, initiator, and photocurable monomer RM257 was diluted in toluene.
3：List of Experimental Equipment and Materials:
UV dye (Avobenzone), chiral agent R5011, initiator Irgacure 651, photocurable monomer RM257, toluene, UV light (λ ≈ 365 nm,
4：3 mW/cm2). Experimental Procedures and Operational Workflow:
The sample was placed on a hot plate at 60(cid:1)C and cured with UV light for 40 min in nitrogen environment.
5：Data Analysis Methods:
The angular response was measured using a circularly polarized green (λ = 532 nm) laser diode.
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