Angular resolution

ability of any image-forming device to distinguish small details of an object From Wikipedia, the free encyclopedia

Angular resolution
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Angular resolution is using image-forming device to get small details of an object. This can increase the image resolution of the image. It is used in optical or radio telescopes, microscopes, cameras, and eyes. In optics, it is used for light waves. In antenna theory, it is used for radio waves. In acoustics, it is used for sound waves.

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Images that show M87* with an angular size of some microarcseconds. It is compared to seeing a tennis ball on the Moon

An optical system can have a high angular resolution. This means that the perceived angular distance, (or what the viewer thinks the angular distance is) or the actual angular distance between the objects is small.

θ is the amount of angular resolution. An angular resolution can be found from the Rayleigh criterion.

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Telescopes and angular resolution

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