1. Paraxial approximationIn geometric optics, the paraxial approximation is a small-angle approximation used in Gaussian optics and ray tracing of light through an optical system (such as a lens). A paraxial ray is a ray which makes a small angle (θ) to the optical axis of the system, and lies close to the axis throughout the system.
Read “Paraxial approximation” on English Wikipedia
Read “近軸近似” on Japanese Wikipedia
Read “Paraxial approximation” on DBpedia
Read “Paraxial approximation” on English Wikipedia
Read “近軸近似” on Japanese Wikipedia
Read “Paraxial approximation” on DBpedia
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