An optical pickup lens for focusing a light beam from a laser light source
on an optical information recording medium is a single lens. The optical
pickup lens has two surfaces, and a surface R2 opposite to a surface R1
closer to the laser light source has a continuous shape. When the surface
R2 has radii h1, h2 and h3 (h1
.DELTA.sag1>.DELTA.sag2 and
.DELTA.sag2<.DELTA.sag3 are satisfied.