Development of Two-dimensional uniform light film of holographic Polymer-dispersed liquid crystal based on Five-wave interference

CAI Jia; LU Siyu; XU Hai; LI Yichen; ZHENG Jihong

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Development of Two-dimensional uniform light film of holographic Polymer-dispersed liquid crystal based on Five-wave interference

Optical Materials | 更新时间：2026-03-24

- Development of Two-dimensional uniform light film of holographic Polymer-dispersed liquid crystal based on Five-wave interference
- OPTICAL TECHNIQUE Vol. 52, Issue 2, Pages: 140-147(2026)
- 作者机构：
  
  上海理工大学光电信息与计算机工程学院,上海市现代光学系统重点实验室，上海 200093
- 作者简介：
- 基金信息：
- DOI：
  CLC： O753⁺.2
- Received：16 November 2025，
  
  Revised：2025-12-28，
  
  Published：20 March 2026
- 稿件说明：
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蔡佳,许海,鲁思宇等.五波干涉全息聚合物分散液晶二维匀光膜研制[J].光学技术,2026,52(02):140-147.

CAI Jia,LU Siyu,XU Hai,et al.Development of Two-dimensional uniform light film of holographic Polymer-dispersed liquid crystal based on Five-wave interference[J].OPTICAL TECHNIQUE,2026,52(02):140-147.
蔡佳,许海,鲁思宇等.五波干涉全息聚合物分散液晶二维匀光膜研制[J].光学技术,2026,52(02):140-147. DOI：

CAI Jia,LU Siyu,XU Hai,et al.Development of Two-dimensional uniform light film of holographic Polymer-dispersed liquid crystal based on Five-wave interference[J].OPTICAL TECHNIQUE,2026,52(02):140-147. DOI：

摘要

二维衍射光栅在匀光显示及光场调控等领域应用广泛，但其性能仍受限于光栅结构设计的合理性与制备工艺效率。文章基于五波干涉理论，设计了一种四棱台棱镜分光器件，采用单次性曝光工艺成功制备50mm×50mm尺寸大小的二维全息聚合物分散液晶光栅膜。在再现波长532nm时，3个不同干涉角条件下，实现对9束衍射光强度分布的有效控制，其一级衍射效率达91%，衍射比可达3:1，衍射角控制精度小于±0.5°。此外，在三醋酸纤维素（Triacetate Cellulose，TAC）膜上成功制得厚度可控的二维匀光光栅膜，经实验验证其最优厚度为40μm，该结构在450~630 nm波段内仍保持86%以上的高衍射效率，展现出良好的宽谱匀光性能。方案光路结构简洁、制备工艺可控性高，显著提升光栅制备的稳定性且匀光效果良好，为宽谱匀光显示和高性能光学调控器件提供了高效可行的技术途径。

Abstract

Two-dimensional diffraction gratings are widely used in applications such as uniform illumination and optical field modulation. However

their performance is largely constrained by the rationality of structural design and the efficiency of fabrication processes. Based on the five-beam interference theory

this study designs a pyramidal prism beam-splitting device and successfully fabricates a 50 mm×50 mm holographic polymer-dispersed liquid crystal （H-PDLC） two-dimensional grating film via a single-exposure process. At a reconstruction wavelength of 532 nm

effective control over the intensity distribution of nine diffracted beams is achieved under three different interference angles. The first-order diffraction efficiency reaches 91%

with a diffraction ratio of 3:1. The angular control precision of the gratings fabricated by the pyramidal prism method is within ±0.5°. Furthermore

a thickness-controllable two-dimensional uniform illumination grating film is successfully prepared on a triacetate cellulose （TAC） substrate. Experimental results indicate that an optimal thickness of 40 μm maintains a high diffraction efficiency of over 86% across the 450~630nm wavelength range

demonstrating excellent broadband uniform illumination performance. The approach features a simple optical path structure and highly controllable fabrication processes

significantly enhancing the stability of grating preparation while achieving excellent light homogenization. It provides an efficient and feasible technical approach for broadband homogeneous illumination displays and high-performance optical modulation devices.

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references

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