Optical recording and reproducing apparatus and optical recording and reproducing method
AssigneeSony Corporation
InventorIsao Ichimura
Life of this patent
Estimating the term…
Abstract
In order to carry out optimization adjustment of a distance between a first lens and a second lens and optimization adjustment of focus offset of two group object lenses in a short period of time, after focusing is operated, while the distance between the first lens and the second lens of the two group object lenses is being adjusted by a first electromagnetic actuator, the two group object lenses are integrally moved by a second electromagnetic actuator, an amplitude variation caused by spherical aberration and an amplitude variation caused by focus servo error which are produced in an RF signal S2 are separated by an envelope detection unit A33 and an envelope detection unit B34 and the two adjustments are carried out simultaneously.
Claims16
An optical recording and reproducing apparatus for at least carrying out either of recording and reproducing of information by irradiating a beam to an optical record medium via two group lenses constituted by a first lens and a second lens, said optical recording and reproducing apparatus comprising:
- first driving means for moving said first lens in an optical axis direction relative to said second lens;
- and
- second driving means for moving said two group lenses in the optical axis direction;
- wherein first adjustment for optimizing a distance between said first lens and said second lens by using said first driving means and second adjustment for optimizing a focus offset by using said second driving means are simultaneously carried out by simultaneously operating said first driving means and said second driving means when focus servo is being operated.
An optical recording and reproducing apparatus for carrying out at least either of recording and reproducing of information by irradiating a beam to an optical record medium via an optical system having a constitution including an optical lens comprising one or more of lenses and a relay lens group comprising one or more of lenses, said optical recording and reproducing apparatus comprising:
- first driving means for moving said relay lens group in an optical axis direction relative to said object lens;
- and
- second driving means for moving said object lens in the optical axis direction;
- wherein first adjustment for optimizing a distance between said relay lens group and said object lens by using the first driving means and second adjustment for optimizing a focus offset by using the second driving means are simultaneously carried out by simultaneously operating said first driving means and said second driving means when focus servo is being operated.
An optical recording and reproducing method of carrying out at least either of recording and reproducing of information by irradiating a beam to an optical record medium via two group lenses comprising a first lens and a second lens:
- wherein first adjustment for optimizing a distance between said first lens and said second lens by moving said first lens in an optical axis direction relative to said second lens and second adjustment for optimizing a focus offset by moving said two group lenses in the optical axis direction are carried out simultaneously when focus servo is being operated.
An optical recording and reproducing method for carrying out at least either of recording and reproducing of information by irradiating a beam to an optical record medium via an optical system having a constitution including an object lens comprising one or more of lenses and a relay lens group comprising one or more of lenses:
- wherein first adjustment for optimizing a distance between said relay lens group and said object lens by moving said relay lens group in an optical axis direction relative to said object lens and second adjustment for optimizing a focus offset by moving said object lens in the optical axis direction are carried out simultaneously when focus servo is being operated.
Dependencies are inferred from the claim text.