近日，韩国釜庆国立大学Hong-Seok Lee团队研究了电动相控阵消色差光束偏转器。2025年8月18日出版的《光：科学与应用》杂志发表了这项成果。

由于平面光学具有实现紧凑系统的特点，它们被广泛用于各种应用，以取代笨重的折射光学。然而，由于色散，它们受到色差的影响，限制了它们在狭窄波长范围内的有效性。因此，衍射光学已应用于特定波长区域内的动态光束转向或用于跨多个波长的静态转向。这一限制使得在全彩显示应用中实现动态光束转向具有挑战性。

为了解决这个问题，研究组开发了一种基于多波长的光学架构，以减轻色差。该系统包括颜色选择缓速器、半波片、偏振片和光束偏转器。他们在实验中展示了一种以传输模式为主题的动态相控阵消色差光束偏转器，实现了460、520和638nm多个波长的连续可调光束转向。

附：英文原文

Title: Achromatic beam deflector with electrodynamic phased arrays

Author: An, Jungkwuen, Kim, Young, Kim, Yunhee, Song, Hoon, Jung, Chunghwan, Won, Kanghee, Rho, Junsuk, Lee, Hong-Seok

Issue&Volume: 2025-08-18

Abstract: Since flat optics has the feature to implement a compact system, they are widely used in various applications to replace bulky refractive optics. However, they suffer from chromatic aberrations due to dispersion, limiting their effectiveness to a narrow wavelength range. Consequently, diffractive optics has been applied for dynamic beam steering within a specific wavelength region or for static steering across multiple wavelengths. This limitation has made it challenging to implement dynamic beam steering in full-color display applications. To address this issue, we developed a multi-wavelength-based optical architecture that mitigates chromatic aberrations. This system incorporates color-selective retarders, half-wave plates, polarization plates, and beam deflectors. We experimentally demonstrated an achromatic beam deflector using a dynamic phase array in transmission mode, achieving continuous tunable beam steering over multiple wavelengths at 460, 520, and 638nm.

DOI: 10.1038/s41377-025-01936-5

Source: https://www.nature.com/articles/s41377-025-01936-5