Patent ID: 7355953

Claim:
An optical pickup light condensing recording system, comprising: a light source which emits light; a grating which separates a portion of the light emitted from the light source; a reflecting member which reflects another portion of the light emitted from the light source; a monitoring photodetector disposed on a traveling path of the light reflected from the reflecting member and which measures the reflected light; an optical path changer which changes an optical path of the light separated by the grating; an objective lens which condenses the light, the optical path of which is changed onto a disc; and a signal detecting photodetector which receives the condensed light reflected from the disc, wherein the signal detecting photodetector is arranged such that optical noise due to reflection of light by the signal detecting photodetector is not received by the monitoring photodetector, enabling the monitoring photodetector to accurately determine a power of recording light, wherein focusing servo and tracking servo operations are performed using a light signal output by the signal detecting photodetector based at least partially on light reflected from the disc, and wherein the reflecting member is disposed around the grating, and wherein the grating has an effective aperture through which the portion of the light which is separated passes, wherein any portion of the light traveling outside of the effective aperture is ineffective light, and wherein the reflecting member is disposed on an optical path of at least a portion of the ineffective light and reflects the least a portion of the ineffective light.