*““I remember that one morning I was preparing bread with Nutella, and suddenly I said: mothers! is there! “.*

*Narrates the Mexican Rafael González the right time when he discovered the solution to a problem optical physicist with centuries unresolved.*

*Isaac Newton himself could not solve it at the time and although approximations had already been found, no one had found the complete answer.*

*This is the solution to spherical aberration in optical lenses , with which now many industries (telescopes, cameras, etc.) can reduce large costs.*

*That morning, after months and months of trying to solve the equation that posed the problem, Rafael knew he already had it.*

*” I went up to my room, I started to program, I saw that he left and I started to jump with emotion,” he tells CONECTA.*

*Graduated from Tec de Monterrey of Industrial Physical Engineering , and currently pursuing a doctorate in nanotechnology right there, Rafael made an alliance with his friend Alejandro to solve the challenge.*

*Alejandro Chaparro, a graduate of UNAM, had invited Rafael to solve the problem; he had been looking for 3 years to solve it.*

*Both met in the master’s degree at the Optics Research Center.*

*“I knew I was a mythical problem. There I met Alejandro;. I insisted and I invited us to solve the problem I would say it was a swamp and would not be able” , says Rafael.*

*A MILLENNIAL PROBLEM*

*The first to substantiate the problem was the Greek mathematician Diocles, more than 2,000 years ago.*

*Then, for centuries, scientists like Newton or Leibniz had tried to solve the challenge: to make the vision of objects through spherical lenses not lose sharpness.*

*Newton invented a telescope that solved the so-called chromatic aberration (which prevents focusing the colors at a single point), but not spherical aberration.*

*In the last century, in 1949, two scientists raised the dilemma in a formal article. From there, it would be known as the Wasserman - Wolf problem .*

*No one had been able to fully resolve it .*

*Newton or Leibniz had tried to solve the challenge: to make the vision of objects through spherical lenses not lose sharpness.*

*THE WORLDWIDE SOLUTION AND RECOGNITION*

*One solution for the problem was the conjunction of two lenses called not spherical but aspherical (only spherical in part of its surface).*

*However, until now, the calibration of these lenses depended on a not entirely accurate calculation.*

*“(In contrast) the analytical solution (found by them) is accurate; using the equation you will have the precise result no matter what the variables change , ” he explains.*

*Rafael and Alejandro published the solution in the article General formula for bi-aspheric singlet lends design free of spherical aberration , in the specialized journal Applied Optics .*

*“We did very well because we had the distinction of the editor ; That is very rare: less than 1 percent of the 35 thousand articles have been published in that magazine have that distinction ” , account.*

*“During our study, we calculated the efficiency of 500 rays, and the average satisfaction of all the examples was 99.9999999999%.”*

*THE IMPACT OF THE FORMULA*

*Julio César Gutiérrez, professor of Tec who advises Rafael on the doctorate , considered that having solved the problem may imply improvements in the development of lenses.*

*“Optical design has technological applications that involve optical systems. Then the results have relevance not only theoretically but in other applications.*

*“ Rafael is a very good student; Enthusiastic and independent. He has a lot of initiative to try to solve challenging problems. “*

*THE SUPPORT OF TEC*

*With 28 years of age, 6 articles published in scientific journals -4 of them on this subject- and 3 more in review, Rafael highlighted the support he received from Tec .*

*He celebrated the institution’s resources , such as support with a Mathematica software license , which he used to perform the equations and simulations of the problem.*

*“However, the greatest support I had from Tec was undoubtedly the confidence of my advisor, which drives you to propose something and share it, even if you get stuck,” he said.*

*And he testifies to that, being able to rest, having been able to solve this ancient problem.*

*“He had been obsessed for many months now,” Rafael says laughing. But you can say: problem solved.”*