对于具有在轴上和轴外环状区域的多焦镜头的视网膜图像质量
1Division of Neurobiology, University of California, Berkeley, CA 94720-3200, USA.
Biomedical optics express
|June 13, 2024
概括
这项研究探讨了多焦镜头设计,表明改变波面曲率和倾斜可以提高焦点深度. 这两种方法在改善视力质量方面几乎可以互换.
科学领域:
- 眼科光学 眼科光学
- 视觉科学 视觉科学
- 光学工程是指光学工程.
背景情况:
- 多焦眼内镜和隐形眼镜的目的是改善焦点深度.
- 传统设计使用带有额外折射功率的环状区域,创建特定的波面图案.
研究的目的:
- 研究一种用于影响多焦镜头聚焦深度的替代方法.
- 为了比较波面曲率 (折射功率) 和波面倾斜对视网膜图像质量的影响.
主要方法:
- 用衍射理论计算单个圆环双焦镜头的视网膜图像光分布.
- 用四种不同的视网膜图像质量测量方法分析过焦扫描.
- 考虑了用于镜头测试的Shack-Hartmann波面传感器的操作特性.
主要成果:
- 发现加功率添加和波面倾斜在对焦深度的影响上几乎可以互换.
- 波面倾斜为调节焦点深度提供了传统折射功率调整的可行替代方案.
结论:
- 除了折射功率之外,改变波面倾斜,还提供了一种灵活的方法来设计多焦眼镜.
- 精确的镜头测试设备的特征,如沙克-哈特曼设备,对于可靠的分析至关重要.
相关概念视频
Focusing of Light in the Eye
2.7K
Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
2.7K
Anatomy of the Eyeball
7.0K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.0K


