angular resolution

简明释义

角度分辨率

英英释义

例句

1.The telescope's angular resolution 角分辨率 allows astronomers to distinguish between closely spaced stars.

这台望远镜的angular resolution 角分辨率 使天文学家能够区分紧密相邻的星星。

2.Astronomers often use interferometry to improve the angular resolution 角分辨率 of their observations.

天文学家常常使用干涉法来提高他们观测的angular resolution 角分辨率。

3.The angular resolution 角分辨率 of the camera determines how well it can capture details in distant subjects.

相机的angular resolution 角分辨率 决定了它捕捉远处对象细节的能力。

4.In microscopy, a higher angular resolution 角分辨率 is crucial for observing fine cellular structures.

在显微镜学中，更高的angular resolution 角分辨率 对于观察细胞结构至关重要。

5.Improving the angular resolution 角分辨率 of satellite images can enhance our ability to monitor environmental changes.

提高卫星图像的angular resolution 角分辨率 可以增强我们监测环境变化的能力。

作文

In the realm of astronomy and imaging technology, the term angular resolution refers to the ability of an optical system to distinguish between two closely spaced objects. It is a critical concept that determines how well we can observe celestial bodies in the night sky or how clearly we can capture images with telescopes and cameras. The angular resolution is usually measured in angular units such as arcseconds or degrees, and it plays a vital role in various fields, including astrophysics, satellite imaging, and even medical imaging.To understand angular resolution, we must first consider the nature of light and how it behaves when it passes through lenses. When observing distant stars or galaxies, the light from these objects can be spread out due to diffraction, which limits the clarity of the image produced by a telescope. The smaller the angular resolution, the better the telescope can distinguish between two points of light that are very close together. This is particularly important for astronomers who wish to study binary star systems or resolve the details of distant galaxies.The formula for calculating angular resolution can be expressed using Rayleigh's criterion, which states that the minimum resolvable angle (θ) in radians is given by θ = 1.22 * (λ/D), where λ is the wavelength of light and D is the diameter of the telescope's aperture. This equation highlights that a larger aperture diameter will yield a finer angular resolution, allowing for clearer and more detailed observations.In practical applications, achieving high angular resolution is essential not only in astronomy but also in other areas such as surveillance and medical imaging. For instance, in satellite imagery, higher angular resolution enables analysts to discern features on the Earth's surface, such as buildings, roads, and vegetation. Similarly, in medical imaging technologies like MRI and CT scans, improved angular resolution allows doctors to obtain clearer images of internal organs, leading to more accurate diagnoses and better patient outcomes.However, there are challenges associated with improving angular resolution. Atmospheric turbulence can distort light as it travels through the Earth's atmosphere, causing blurring in images taken from ground-based telescopes. To mitigate this, astronomers often use adaptive optics systems that adjust the shape of the telescope's mirror in real time to compensate for atmospheric disturbances. This technology has significantly enhanced the angular resolution of ground-based telescopes, allowing them to rival the capabilities of space telescopes.Moreover, the concept of angular resolution is not limited to optical systems; it is also applicable in radio astronomy. Radio telescopes utilize arrays of antennas to achieve high angular resolution through a technique known as interferometry. By combining signals from multiple antennas, astronomers can simulate a much larger aperture, resulting in improved resolution and the ability to study faint radio sources in the universe.In conclusion, angular resolution is a fundamental aspect of observational science that impacts how we perceive and understand the universe around us. Whether through telescopes, satellites, or medical imaging devices, the ability to resolve fine details is crucial for advancing our knowledge and technological capabilities. As we continue to develop new technologies and techniques, the pursuit of better angular resolution will remain a key focus for researchers and scientists across various disciplines.

在天文学和成像技术领域，术语角分辨率指的是光学系统区分两个相距较近物体的能力。这是一个关键概念，决定了我们在夜空中观察天体的能力，或用望远镜和相机清晰捕捉图像的能力。角分辨率通常以弧秒或度等角度单位来测量，在天体物理学、卫星成像甚至医学成像等多个领域发挥着至关重要的作用。要理解角分辨率，我们首先必须考虑光的性质以及它通过透镜时的行为。当观察遥远的星星或星系时，这些物体的光由于衍射而扩散，限制了望远镜产生的图像的清晰度。角分辨率越小，望远镜就越能区分非常接近的两个光点。这对于希望研究双星系统或解析遥远星系细节的天文学家尤为重要。计算角分辨率的公式可以通过瑞利准则来表达，最小可分辨角（θ）以弧度表示，公式为θ = 1.22 * (λ/D)，其中λ是光的波长，D是望远镜口径的直径。这个方程突出了更大的口径直径将产生更精细的角分辨率，从而允许更清晰、更详细的观察。在实际应用中，获得高角分辨率不仅在天文学中至关重要，还在其他领域如监视和医学成像中同样重要。例如，在卫星图像中，更高的角分辨率使分析人员能够辨别地球表面的特征，如建筑物、道路和植被。同样，在MRI和CT扫描等医学成像技术中，改善的角分辨率使医生能够获得内部器官的更清晰图像，从而导致更准确的诊断和更好的患者结果。然而，提高角分辨率也面临挑战。大气湍流会扭曲光线，导致地面望远镜拍摄的图像模糊。为了减轻这种影响，天文学家通常使用自适应光学系统，实时调整望远镜镜子的形状，以补偿大气扰动。这项技术显著增强了地面望远镜的角分辨率，使其能够与太空望远镜的能力相媲美。此外，角分辨率的概念不仅限于光学系统；它在射电天文学中同样适用。射电望远镜利用天线阵列通过一种称为干涉测量的技术来实现高角分辨率。通过组合来自多个天线的信号，天文学家可以模拟一个更大的口径，从而提高分辨率，并能够研究宇宙中微弱的射电源。总之，角分辨率是观察科学的基本方面，影响着我们如何感知和理解周围的宇宙。无论是通过望远镜、卫星还是医学成像设备，解析细节的能力对推进我们的知识和技术能力至关重要。随着我们不断发展新技术和新方法，追求更好的角分辨率将始终是各个学科研究人员和科学家的重点。