What happens to spatial resolution if OID is increased?

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Multiple Choice

What happens to spatial resolution if OID is increased?

Explanation:
Increasing the distance from the object to the image plane makes geometric unsharpness worse. The finite size of the focal spot means rays spread out as they travel, so the image of a single point on the object becomes a larger blurred spot on the detector. The farther the object is from the detector (larger OID), the bigger that blur gets relative to the details you’re trying to resolve, so fine details blur together and spatial resolution drops. In common terms: more OID means less sharpness.

Increasing the distance from the object to the image plane makes geometric unsharpness worse. The finite size of the focal spot means rays spread out as they travel, so the image of a single point on the object becomes a larger blurred spot on the detector. The farther the object is from the detector (larger OID), the bigger that blur gets relative to the details you’re trying to resolve, so fine details blur together and spatial resolution drops. In common terms: more OID means less sharpness.

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