Aspheric Optic
Spherical lenses have constant curvature from center to edge, while aspheric lenses have continuously varying curvature. The most significant advantage of replacing spherical lenses with aspheric lenses is correction of spherical aberration in collimating and focusing systems. Adjusting the conic constant and aspheric coefficients minimizes spherical aberration. Aspheric lenses bring rays to the same point to improve optical quality, essentially eliminating the spherical aberration of spherical lenses, whose rays converge at different points and blur the image. Aspheric lenses improve optical quality, reduce the number of optical elements, and lower design costs. Their distinctive advantages over spherical lenses have led to wide use in optical instruments, imaging, and optoelectronics, including digital cameras, CD players, and advanced microscopy instruments.
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