numerical aperture

简明释义

数值孔径

英英释义

例句

1.The numerical aperture (数值孔径) is a critical factor in determining the light-gathering ability of an optical system.

在确定光学系统的集光能力时，数值孔径是一个关键因素。

2.The lens has a high numerical aperture (数值孔径), allowing it to capture more light and produce clearer images.

这款镜头具有较高的数值孔径，能够捕捉更多光线并产生更清晰的图像。

3.When designing fiber optics, engineers must consider the numerical aperture (数值孔径) to ensure efficient light transmission.

在设计光纤时，工程师必须考虑数值孔径以确保有效的光传输。

4.In microscopy, a higher numerical aperture (数值孔径) results in better resolution.

在显微镜学中，更高的数值孔径会带来更好的分辨率。

5.To achieve optimal performance, the numerical aperture (数值孔径) of the objective lens should match that of the condenser.

为了实现最佳性能，物镜的数值孔径应与聚光镜的相匹配。

作文

The concept of numerical aperture plays a crucial role in the field of optics, particularly in microscopy and fiber optics. Understanding this term is essential for anyone involved in scientific research or technical applications that require precise imaging and measurement. The numerical aperture (NA) is defined as the sine of the maximum half-angle of the cone of light that can enter or exit the lens system, multiplied by the refractive index of the medium in which the lens is working. This definition might sound complex, but it essentially describes how much light a lens can gather and how well it can resolve fine details in the specimen being observed.In microscopy, a higher numerical aperture indicates a better ability to capture light and resolve smaller features. For instance, an objective lens with a numerical aperture of 1.4 can gather more light than one with a NA of 0.95, allowing for clearer and more detailed images. This is particularly important in biological sciences, where researchers often need to observe small structures within cells or tissues. The clarity of these images can significantly affect the quality of the data collected and the conclusions drawn from experiments.Furthermore, the numerical aperture is not only relevant in microscopy but also in fiber optic technology. In optical fibers, a higher numerical aperture allows for more light to be transmitted through the fiber, which enhances the efficiency of data transmission. This is critical in telecommunications and networking, where the speed and quality of data transfer are paramount. As technology advances, understanding the implications of numerical aperture becomes increasingly important for engineers and technicians working in these fields.To grasp the significance of numerical aperture, consider its impact on depth of field and resolution. A lens with a high NA will have a shallow depth of field, meaning that only a thin slice of the specimen will be in focus at any given time. While this may seem limiting, it actually allows for greater detail to be observed in that specific plane, which is often desired in high-resolution imaging. Conversely, a lens with a lower NA provides a greater depth of field, which can be advantageous when a broader view of a sample is necessary, although it may sacrifice some detail.In conclusion, the numerical aperture is a fundamental concept that underlies many aspects of optical science and technology. Its influence extends from the laboratory to the telecommunications industry, highlighting its importance across multiple disciplines. For students and professionals alike, mastering the principles of numerical aperture is essential for achieving success in their respective fields. As we continue to push the boundaries of what is possible in imaging and data transmission, the relevance of numerical aperture will undoubtedly remain a key topic of discussion and exploration in the scientific community.

“数值孔径”这个概念在光学领域中扮演着至关重要的角色，尤其是在显微镜和光纤光学方面。理解这个术语对于任何从事科学研究或需要精确成像和测量的技术应用的人来说都是必不可少的。“数值孔径”（NA）的定义是：可以进入或离开透镜系统的光锥的最大半角的正弦值，乘以透镜工作介质的折射率。这个定义可能听起来很复杂，但它基本上描述了一个透镜能够收集多少光以及它在观察标本时能够分辨细微细节的能力。在显微镜学中，更高的“数值孔径”表示更好的捕光能力和分辨更小特征的能力。例如，一个“数值孔径”为1.4的物镜可以比一个NA为0.95的物镜收集更多的光，从而获得更清晰、更详细的图像。这在生物科学中尤为重要，因为研究人员常常需要观察细胞或组织中的微小结构。这些图像的清晰度会显著影响所收集数据的质量以及从实验中得出的结论。此外，“数值孔径”不仅在显微镜中相关，在光纤技术中也同样重要。在光纤中，更高的“数值孔径”允许更多的光通过光纤传输，这提高了数据传输的效率。这在电信和网络中至关重要，因为数据传输的速度和质量至关重要。随着技术的进步，理解“数值孔径”的影响对从事这些领域的工程师和技术人员变得越来越重要。要理解“数值孔径”的重要性，可以考虑它对景深和分辨率的影响。具有高NA的透镜将具有较浅的景深，这意味着在任何给定时间，只有标本的薄片会处于焦点中。虽然这看起来可能有限制，但实际上它允许在特定平面中观察到更大的细节，这在高分辨率成像时通常是所需的。相反，具有较低NA的透镜提供更大的景深，当需要更广泛的样本视图时，这可能是有利的，尽管它可能牺牲一些细节。总之，“数值孔径”是支撑光学科学和技术许多方面的基本概念。它的影响从实验室延伸到电信行业，突显了其在多个学科中的重要性。对于学生和专业人士而言，掌握“数值孔径”的原理对在各自领域取得成功至关重要。随着我们不断推动成像和数据传输可能性的边界，“数值孔径”的相关性无疑将继续成为科学界讨论和探索的关键话题。