Patent ID: 7197002

Claim:
An optical pickup for accessing at least first and second optical recording mediums, the pickup comprising: a first light source generating a first light beam of a first wavelength; a second light source generating a second light beam of a second wavelength different from the first wavelength; an optical section transmitting the first and second light beams; and an aperture number controller including a wave selecting-polarizing member for selecting between the first and second light beams of different wavelengths so as to impinge a light beam with an appropriate aperture number to selectively access one of the at least first and second optical recording mediums, wherein the aperture number controller allows the number of aperture to have a first value when the first optical recording medium is accessed; the aperture number controller allows the number of aperture to have a second value when the second optical recording medium is accessed; and the aperture number controller allows the number of aperture to have a third value when a third optical recording medium is accessed.