Patent ID: 7944796
Filing Date: 2011-05-17
Classification: G11B

Abstract:
1. A recording apparatus for recording interference fringes on a recording medium by interfering information light with reference light, comprising: a first light source which irradiates first laser light for a DVD recording operation; a second light source which irradiates second laser light for a CD recording operation; an optical spatial modulating unit which applies information to the first laser light; and an objective lens which collect the first laser light and the second laser light at different positions on the same optical axis, wherein in case of a hologram recording operation, the hologram recording operation is carried out by employing a first optical path and a second optical path, information light to which the information is applied via the optical spatial modulating unit is produced from the first laser light and the produced information light is conducted to the objective lens along the first optical path, and reference light is produced without routing the optical spatial modulating unit from the first laser light and the produced reference light is conducted to the objective lens along the second optical path, and at the same time, an address/servo control operation is carried out by employing a third optical path along which the second laser light is conducted to the objective lens; wherein in case of the DVD recording operation, the DVD recording operation is carried out by employing the second optical path; and wherein in case of the CD recording operation, the CD recording operation is carried out by employing the third optical path.