Spot size and peak intensity of a light spot focused by a GRIN rod lens using a collimated laser-diode beam were measured as a function of the amount of defocus and of lens tilt. Assuming only primary spherical aberration, the wave aberration of the GRIN lens was estimated by diffraction theory taking the presence of aberrations into account. In a point-to-point imaging system, the spot size was measured as a function of the distance between lens and light source.
© 1984 Optical Society of America
M. Daimon, M. Shinoda, and T. Kubo, "Focusing properties of gradient-index lens for laser-diode beam," Appl. Opt. 23, 1790-1793 (1984)