Advanced Optics Using Aspherical Elements

Advanced Optics Using Aspherical Elements

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an aspheric lens or asphere often labeled asph on eye pieces is a lens whose surface profiles are not portions of a sphere or cylinderin photography a lens assembly that includes an aspheric element is often called an aspherical lens the aspheres more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism