用于 HMD 的新型高光效薄饼光学器件,命名为 "双路径

IF 1.1 4区 物理与天体物理 Q4 OPTICS Optical Review Pub Date : 2024-09-11 DOI:10.1007/s10043-024-00908-1
Naru Usukura, Takehisa Yoshida, Kiyoshi Minoura, Yoshiko Honma
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引用次数: 0

摘要

用于 HMD(头戴式显示器)的折叠光学器件,通常称为薄饼光学器件,被广泛用于实现紧凑型 HMD 头戴式显示器。这种光学器件具有结构紧凑的优点,但也存在光效较低的缺点。为了克服这一问题,我们提出了新型 HMD 薄饼光学器件,命名为 "DP(双路径)薄饼光学器件",以同时实现紧凑性和高光效。在本文中,我们介绍了 "DP 薄饼光学器件 "的原理,并回顾了我们的原型。我们描述了光学模拟结果,以找到厚度、透镜功率和倍率之间的高度平衡设计。我们还介绍了偏振状态和对准精度等方面的制造研究。我们成功制作了两个 90° FOV(视场角)原型,其中一个光学厚度为 20.6 毫米,另一个光学厚度为 25.5 毫米。后一种原型机的液晶显示屏分辨率为 1200 ppi(每英寸像素),尤其显示出较高的 MTF。两款原型机的光效都比传统原型机高出 1.8 倍。此外,为了进一步扩展 DP 薄饼光学器件,我们还介绍了具有更宽 FOV 的改进设计,以用于未来的原型制造。因此,我们还展示了改进设计的光学仿真结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Novel high light efficiency pancake optics for HMD named “double path”

The folded optics for HMD (head-mounted display), commonly referred to as pancake optics, is widely used to realize a compact HMD headset. The optics has the advantage of compactness, but also has a big drawback of lowering light efficiency. To overcome the issue, we proposed novel HMD pancake optics named “DP (double path) pancake optics” to achieve both compactness and high light efficiency simultaneously. In this paper, we introduce the principle of our “DP pancake optics” and review our prototype. We describe optical simulation results to find a highly balanced design among thickness, lens power, and magnification ratio. We also describe fabrication study of, such as polarization state and alignment accuracy. We successfully have fabricated two prototypes with 90° FOV (field of view), one of which is 20.6 mm optics thickness and the other is 25.5 mm optics thickness. The latter prototype especially shows high MTF with a 1200 ppi (pixel per inch) resolution LCD (liquid crystal display). Both prototypes have 1.8 times higher light efficiency than that of conventional one. In addition, to further expand the DP pancake optics, we also describe the improved design with wider FOV for future prototype fabrication. Therefore, we also show the optical simulation result of the improved design.

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来源期刊
Optical Review
Optical Review 物理-光学
CiteScore
2.30
自引率
0.00%
发文量
62
审稿时长
2 months
期刊介绍: Optical Review is an international journal published by the Optical Society of Japan. The scope of the journal is: General and physical optics; Quantum optics and spectroscopy; Information optics; Photonics and optoelectronics; Biomedical photonics and biological optics; Lasers; Nonlinear optics; Optical systems and technologies; Optical materials and manufacturing technologies; Vision; Infrared and short wavelength optics; Cross-disciplinary areas such as environmental, energy, food, agriculture and space technologies; Other optical methods and applications.
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