Patent ID: 7417934

Claim:
An optical pickup mounted on a pickup base moving relative to an optical recording medium and used to record information on and/or reproduce information from the optical recording medium, the optical pickup comprising: a first optical module, as a housing with a light source; an objective lens to focus a first light beam emitted from the first optical module on the optical recording medium; a first front photo-detector to monitor power of the first light beam emitted from the first optical module toward optical components to irradiate the optical recording medium; a first collimating lens between the first optical module and the objective lens to transform the first light beam into a parallel beam; and a holder adjustably installed on the pickup base, wherein the first optical module and the first front photo-detector are coupled to the holder such that the first front photo-detector is arranged a predetermined distance from the first optical module during an adjusting of the holder to locate the first optical module at the focus of the first collimating lens, wherein the first front photo-detector is provided between the first optical module and the first collimating lens.