UJI KESEMPURNAAN LENSA BERDASARKAN SIFAT ABERASI LENSA MENGGUNAKAN METODE INTERFEROMETER TWYMAN-GREEN

Abstract

It have been done by research about the change of frinji pattern causing by imperfect of lens for aberrations with Twyan-Green interferometer method. The ray used are laser ray of He-Ne by l = 632.8 nm and laser ray of dioda by l = 645 nm. The materials used is 4 convex lens which is each having focus length of lens are 18 mm, 48 mm, 50 mm and 100 mm. Imperfection of lens can be seen from deviation of frinji pattern yielded, this deviation can be seen from the form of frinji pattern yielded and from position of frinji pattern to thet center of binding light. The examination which have been done to four convex lens obtained that is ever greater of its focus length, its perfection storey, level progressively nicely because the fringes nearly from the center of binding light. But imperfection storey do not hinge to its focus length however hinging curvature storey from surface of lens because with curvature of surface of lens which smaller, sferis aberration of lens would be smaller also.