Patent ID: 7535804
Filing Date: 2009-05-19
Classification: G11B

Abstract:
1. A recording apparatus for recording an information on a recordable optical record carrier by irradiation of a light beam onto said record carrier for forming marks and lands representing said information along an information recording direction, comprising: a light source for generating a light beam, optical means for irradiating said light beam onto said record carrier, wherein said optical means comprise means for reducing the numerical aperture of said optical means in the direction orthogonal to the information recording direction during recording of information to obtain a light beam having a substantial oval spot profile having a shorter axis in the information recording direction compared to the direction orthogonal thereto and wherein, said means for reducing the numerical aperture comprises a beam shaper in a light path from the light source to said record carrier, the beam shaper controlling the cross-sectional shape of the beam and/or cross-sectional variation in the intensity of the beam, wherein said means for reducing the numerical aperture comprise switchable means for switching a switchable non-round aperture in the light path during recording, and control means for controlling said switchable means by switching said switchable means on or off by bringing said switchable means into the light path during recording.