concave lens

简明释义

凹透镜

英英释义

例句

1.An optical instrument often uses a concave lens 凹透镜 to magnify small objects.

光学仪器常常使用凹透镜 凹透镜来放大小物体。

2.In a projector, a concave lens 凹透镜 is used to focus the light onto the screen.

在投影仪中，使用凹透镜 凹透镜将光线聚焦到屏幕上。

3.The concave lens 凹透镜 in a camera helps to create a wider field of view.

相机中的凹透镜 凹透镜有助于创造更广阔的视野。

4.When light passes through a concave lens 凹透镜, it diverges and spreads out.

当光线通过凹透镜 凹透镜时，它会发散并扩散开来。

5.A pair of glasses with a concave lens 凹透镜 helps people with nearsightedness see distant objects clearly.

一副带有凹透镜 凹透镜的眼镜可以帮助近视的人清晰地看见远处的物体。

作文

A concave lens is a type of lens that diverges light rays that are incident on it. Unlike convex lenses, which converge light to a focal point, concave lenses spread out light rays and can create virtual images. This unique property makes them particularly useful in a variety of optical applications. For instance, they are commonly used in glasses for people who are nearsighted, as they help to correct vision by allowing the light to focus properly on the retina.To understand how a concave lens works, it's essential to grasp some basic principles of optics. When parallel rays of light hit a concave lens, they bend outward. The focal point of a concave lens is virtual, meaning that the light rays appear to originate from a point behind the lens. This is why objects viewed through a concave lens may seem larger and closer than they actually are.In practical applications, concave lenses can be found in various devices. For example, they are used in microscopes and telescopes to enhance the viewing experience. By incorporating concave lenses, these instruments can manipulate light in ways that allow us to see both distant and tiny objects with greater clarity. Furthermore, in photography, concave lenses can help to correct distortions caused by other lenses in a camera system.The design of a concave lens is also crucial to its functionality. Typically made of glass or plastic, these lenses have a surface that curves inward, resembling a cave, which is where the name 'concave' comes from. The degree of curvature affects the strength of the lens; a more pronounced curve will result in a stronger lens that diverges light more significantly.In addition to their use in vision correction and optical devices, concave lenses have applications in laser technology and fiber optics. In lasers, they can be used to focus beams of light, while in fiber optics, they help guide light through the fibers efficiently. This versatility highlights the importance of concave lenses in both everyday life and advanced technology.Understanding concave lenses is not only important for those studying physics or optics but also for anyone interested in how we interact with light in our daily lives. From the glasses we wear to the cameras we use, concave lenses play a vital role in enhancing our vision and capturing the world around us.In conclusion, a concave lens is an essential optical element that serves multiple purposes across various fields. Its ability to diverge light rays makes it invaluable in correcting vision and improving optical devices. As we continue to explore and innovate in the realm of optics, the significance of concave lenses will undoubtedly remain a fundamental aspect of our understanding of light and vision.

凹透镜是一种透镜，可以使入射光线发散。与会聚光线到焦点的凸透镜不同，凹透镜会将光线散开，并能形成虚像。这一独特特性使得它在各种光学应用中尤其有用。例如，它们通常用于近视患者的眼镜中，因为它们通过帮助光线正确聚焦在视网膜上来矫正视力。要理解凹透镜的工作原理，首先需要掌握一些光学的基本原理。当平行光线照射到凹透镜时，它们会向外弯曲。凹透镜的焦点是虚拟的，这意味着光线似乎从透镜后面的一点发出。这就是为什么通过凹透镜观察的物体可能看起来比实际更大和更近。在实际应用中，凹透镜可以在各种设备中找到。例如，它们在显微镜和望远镜中被用来增强观察体验。通过结合使用凹透镜，这些仪器能够以更清晰的方式操控光线，从而让我们看到远处和微小的物体。此外，在摄影中，凹透镜可以帮助修正其他镜头在相机系统中造成的畸变。凹透镜的设计对于其功能也至关重要。通常由玻璃或塑料制成，这些透镜的表面向内弯曲，类似于一个洞穴，这也是“凹”的名称来源。弯曲的程度影响透镜的强度；弯曲越明显，透镜的强度越大，光线发散得越显著。除了在视力矫正和光学设备中的应用外，凹透镜还广泛应用于激光技术和光纤中。在激光中，它们可以用来聚焦光束，而在光纤中，它们有助于有效地引导光线通过光纤。这种多功能性突显了凹透镜在日常生活和先进技术中的重要性。理解凹透镜不仅对学习物理或光学的人重要，也对任何对我们日常生活中如何与光互动感兴趣的人至关重要。从我们佩戴的眼镜到我们使用的相机，凹透镜在增强我们的视觉和捕捉周围世界中发挥着至关重要的作用。总之，凹透镜是一种重要的光学元件，在多个领域中发挥着多重作用。它发散光线的能力使其在矫正视力和改善光学设备方面不可或缺。随着我们继续探索和创新光学领域，凹透镜的重要性无疑将保持在我们对光和视觉的理解中。