Dewen Cheng (程德文)

Dewen Cheng (程德文)

北京理工大学，教授

Beijing Institute of Technology，Professor

程德文，1982年生，江西婺源人，博士，北京理工大学光电学院教授、博士生导师，国家级领军人才。长期从事自由曲面光学与VR/AR头戴显示研究，是国内最早布局该方向的学者之一，主持国家973、863、国家重点研发计划等20余项项目，授权中外发明专利100余项。2015年创办北京耐德佳显示技术有限公司，聚焦AR光学显示模组与护眼显示等产品，企业获评国家级专精特新“小巨人”，多次入选中国VR50强并获得世界VR大会产品金奖，开创儿童青少年视力防控光学设备新品类。

Dewen Cheng, born in 1982 in Wuyuan, Jiangxi Province, holds a PhD. He is a Professor and PhD Supervisor at the School of Optoelectronics, Beijing Institute of Technology, and a National-Level Leading Talent. He has long been engaged in research on free-form surface optics and VR/AR head-mounted displays, and is one of the earliest scholars in China to pioneer research in this field. He has presided over more than 20 national-level projects including the 973 Program, the 863 Program and the National Key R&D Program, and has been granted more than 100 invention patents in China and abroad.

He founded Beijing Nedgia Display Technology Co., Ltd. in 2015, focusing on products such as AR optical display modules and eye-protecting display solutions. The enterprise has been accredited as a National-Level Specialized, Sophisticated, Unique and Novel "Little Giant" enterprise, selected into the China VR Top 50 for many times and won the Product Gold Award at the World VR Conference. He has pioneered a new category of optical equipment for vision prevention and control for children and adolescents.

VR/AR 光学系统设计：原理与工程工艺

摘要：

1. 顶层架构与指标定义

涵盖背景介绍、主流技术路线分类（VR/AR），以及FOV、PPD、Eye-box等系统关键指标的定义逻辑与权衡。

2. 自由曲面AR：像差校正与杂光分析

深入自由曲面设计原理，重点讲解离轴系统中的像差平衡策略，以及杂散光（Stray Light）的成因与分析方法。

3. VR Pancake：折叠光路与鬼影复盘

剖析Pancake偏振复用机制，深度解析折叠光路中鬼影（Ghost）的产生路径与抑制方案。

4. AR光波导：物理机制与衍射设计

从几何光学跨越到物理光学，阐述波导传输原理与设计逻辑。

5. 落地闭环：精密加工与系统检测

讲解自由曲面/波导的超精密加工工艺，以及从元件到整机的系统级光学检测标准。

VR/AR Optical System Design: Principles and Engineering Processes

Abstract：

1. Top-Level Architecture & Metrics Definition
   Covers background introduction, classification of mainstream technical approaches (VR/AR), and the definition logic and trade-offs of key system metrics such as FOV, PPD, and Eye-box.

2. Freeform Surface AR: Aberration Correction & Stray Light Analysis
   Delves into the principles of freeform surface design, focusing on aberration balancing strategies in off-axis systems, as well as the causes and analysis methods of stray light.

3. VR Pancake: Folded Optical Path & Ghost Reflection Review
   Analyzes the polarization multiplexing mechanism of Pancake optics, providing an in-depth examination of ghost reflection generation paths and suppression solutions in folded optical paths.

4. AR Waveguide: Physical Mechanisms & Diffraction Design
   Transitions from geometric optics to physical optics, explaining the principles of waveguide transmission and design logic.

5. Implementation Loop: Precision Manufacturing & System Testing
   Explores ultra-precision machining processes for freeform surfaces and waveguides, as well as system-level optical testing standards from components to full devices.