相关实验视频
Updated: Jul 27, 2026
12:18
Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
概括
远鱼在球形镜头内具有独特的折射率梯度,这对于清晰的视力至关重要. 这项研究揭示了梯度的梯度.
科学领域:
- 眼科医生 眼科 眼科
- 比较生物学的比较生物学
- 生物物理学的生物物理.
背景情况:
- 脊椎动物的透镜不断生长,需要透明度和稳定的折射性能.
- 远鱼具有具有高折射功率的球形镜头,对于水中的视觉至关重要.
- 一个折射率梯度被认为是纠正光学偏差在统一的球形镜头.
研究的目的:
- 为了研究非洲鱼 (Haplochromis burtoni) 镜片中的折射率梯度.
- 为了确定镜头梯度是否对球形偏差进行校正.
- 为了将观察到的梯度与之前假设的模型进行比较.
主要方法:
- 对镜头的折射率进行光学测量.
- 透镜结构和细胞生长模式的分析.
- 图像质量评估与或没有折射率梯度.
主要成果:
- 在Haplochromis burtoni镜片中证实存在折射率梯度.
- 观察到的梯度的形状与之前的假设有很大的不同.
- 梯度在远距离眼睛的光学性能中起着至关重要的作用.
结论:
- 远距离鱼镜头中的折射率梯度对于图像形成至关重要.
- 这种梯度的特定形式是独特的,并且与先前的假设有所不同.
- 需要进一步的研究才能充分理解这种梯度对发育和功能的影响.
相关概念视频
01:25Crystal Growth: Principles of Crystallization
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent – the...
01:18Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...