Plano-convex Spherical Lenses manufacturers tell you that in terms of optical design, the difference between aspheric lenses and spherical lenses, aspheric lenses have higher degrees of freedom, which means that more complex lens surfaces can be created to achieve better Optical element surface quality. Plano-convex Spherical Lenses manufacturers tell you that spherical aberration is corrected by aspheric lenses. Another advantage of aspheric lenses is that they reduce the overall length and weight of the optical system compared to traditional lenses.

Plano-convex Spherical Lenses manufacturers tell you that the phenomenon of optical system reduction in aspheric lens applications can also be found in other optical devices, such as in photographic lenses. In the case of only one lens, by optically magnifying one surface of the two lenses, a focal length system, beam expansion, and beam diameter increase can be achieved without generating divergence errors.
The manufacturers of Plano-convex Spherical Lenses tell you that due to the focal length characteristics of the system, multiple lenses can be connected in a row, thereby reducing the optical system and changing the total beam diameter at the same time. Compared with conventional optical systems, the developed beam expander system can reduce the overall length by up to 50% by combining multiple aspherical lenses. The Kepler and Galileo telescopes with 10x magnification (M=10) are shown compared to the Expander with the same magnification but halved in length.
The above information is the Plano-convex Spherical Lenses manufacturer's introduction and analysis of the difference between aspheric lenses and spherical lenses, hope it helps you.