The spherical aberration correction by using bending and lens splitting: A compression

The spherical and chromatic are the primary aberration type that degrades the performance of optical instruments used in human eye vision correction. This paper demonstrates and compares two methods for spherical aberration correction. One of these methods is lens bending and how can an aspheric surface contributed to minimizing the spherical aberration. This is done by adjusting the conic constant according to the surface type. The second method is lens splitting. In this part, the ZEMAX program is used to illustrate the lens’s splitting effect on the results. However, it is found that if a double (two elements) used, spherical aberration would reduce by a factor (4.7). If a triple (three elements) is used, spherical aberration will reduce by a (18.8). For more aberration reduction, compensation for the two methods is used. The results show that the triplet lens made a great reduction in aberration. This triplet is used to improve the human eye vision by using Liou-Brennan model based on zemax program. The final result is that a noticeable improvement in the vision occurs since the aberration is reduced.