concave lens

简明释义

凹透镜

英英释义

例句

1.Astronomers often use concave lenses in telescopes to gather more light and improve visibility of distant stars.

天文学家经常在望远镜中使用凹透镜以收集更多光线并改善对遥远星星的可见性。

2.The camera uses a concave lens to create a clear image by converging light.

相机使用凹透镜通过汇聚光线来创建清晰的图像。

3.A concave lens is used in eyeglasses for nearsightedness, helping to focus light correctly on the retina.

在近视眼镜中使用凹透镜，帮助将光线正确聚焦在视网膜上。

4.In a projector, a concave lens can enlarge the image by bending the light rays inward.

在投影仪中，凹透镜可以通过向内弯曲光线来放大图像。

5.A concave lens is essential in laser systems to focus the beam to a specific point.

在激光系统中，凹透镜是将光束聚焦到特定点的必需品。

作文

A concave lens is a type of lens that is thinner at the center than at the edges and is curved inward. This unique shape allows it to diverge light rays that are entering the lens. In optical physics, concave lens is often used to correct vision problems such as nearsightedness, also known as myopia. When a person has myopia, they can see nearby objects clearly but struggle with distant objects because the light rays converge before reaching the retina. By using a concave lens, the light rays are spread out, allowing the image to focus correctly on the retina and improve vision clarity.In addition to correcting vision, concave lenses have various applications in different fields. For example, they are commonly used in optical devices such as cameras, microscopes, and telescopes. In these devices, concave lenses help in forming images by manipulating light paths. The ability of a concave lens to diverge light makes it an essential component in many optical systems.The science behind how a concave lens works is quite fascinating. When parallel light rays pass through a concave lens, they are refracted outward. This phenomenon occurs due to the lens's curvature, which causes the light to bend away from the optical axis. The focal point of a concave lens is virtual, meaning that the light rays do not actually converge at this point; instead, they appear to originate from it when traced backward. This property is crucial for creating virtual images that are upright and smaller than the object being viewed.Moreover, concave lenses are also used in safety glasses and goggles. In these applications, they help to reduce glare and improve visibility by dispersing bright light. This characteristic makes them valuable for people working in bright environments or engaging in activities such as skiing or cycling, where sunlight can reflect off surfaces and cause discomfort.In conclusion, the concave lens is an essential tool in both everyday life and scientific applications. Its ability to diverge light makes it invaluable in correcting vision and enhancing optical devices. Understanding the principles behind a concave lens allows us to appreciate its role in technology and its impact on our daily experiences with sight. As we continue to explore advancements in optics, the concave lens will undoubtedly remain a vital component in shaping how we interact with the world around us.

凹透镜是一种中央比边缘薄的透镜，向内弯曲。这种独特的形状使其能够发散进入透镜的光线。在光学物理学中，凹透镜通常用于矫正视力问题，例如近视，也称为近视。当一个人有近视时，他们可以清楚地看到近处的物体，但在远处的物体上则会感到困难，因为光线在到达视网膜之前就聚焦了。通过使用凹透镜，光线被扩散，使图像能够正确聚焦在视网膜上，从而改善视力清晰度。除了矫正视力外，凹透镜在不同领域还有各种应用。例如，它们常用于相机、显微镜和望远镜等光学设备。在这些设备中，凹透镜通过操控光线路径来帮助形成图像。凹透镜发散光线的能力使其成为许多光学系统中的重要组成部分。凹透镜工作原理的科学非常迷人。当平行光线穿过凹透镜时，它们会向外折射。这种现象是由于透镜的曲率引起的，导致光线偏离光轴。凹透镜的焦点是虚拟的，这意味着光线实际上并不会在这一点上聚焦；相反，当向后追踪时，它们似乎从这个点发出。这一特性对于创建直立且小于被观察物体的虚拟图像至关重要。此外，凹透镜还用于安全眼镜和护目镜。在这些应用中，它们通过分散明亮的光线来减少眩光和改善能见度。这一特性使它们对在明亮环境中工作或参与滑雪或骑自行车等活动的人非常有价值，因为阳光可能会从表面反射并造成不适。总之，凹透镜是日常生活和科学应用中的重要工具。它发散光线的能力使其在矫正视力和增强光学设备方面无价。理解凹透镜背后的原理使我们能够欣赏其在技术中的作用及其对我们日常视觉体验的影响。随着我们继续探索光学的进步，凹透镜无疑将继续在塑造我们与周围世界的互动中发挥重要作用。