Device and unit for correcting aberration of light beam
AssigneePioneer Corporation
InventorsMasayuki Iwasaki, Makoto Sato
Life of this patent
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Abstract
An aberration correcting unit is provided for correcting an aberration of a light beam radiated onto an object to be detected and then reflected from the object. This unit comprises an aberration correcting device comprising a first corrector configured to correct the aberration of the light beam radiated onto the object; and a second corrector configured to correct the aberration of the light beam reflected from the object and to divide the reflected light beam into a plurality of light beams. The aberration correcting unit further comprises a first driver configured to drive the first corrector and a second driver configured to drive the second corrector.
Claims15
An aberration correcting device used by an aberration correcting unit for correcting an aberration of a light beam radiated onto an object to be detected and then reflected from the object, the aberration correcting device comprising:
- a first corrector configured to correct the aberration of the light beam radiated onto the object;
- and
- a second corrector configured to correct the aberration of the light beam reflected from the object and to divide the reflected light beam into a plurality of light beams.
An aberration correcting unit for correcting an aberration of a light beam radiated onto an object to be detected and then reflected from the object, the aberration correcting unit comprising:
- an aberration correcting device comprising a first corrector configured to correct the aberration of the light beam radiated onto the object;
- and a second corrector configured to correct the aberration of the light beam reflected from the object and to divide the reflected light beam into a plurality of light beams;
- a first driver configured to drive the first corrector;
- and
- a second driver configured to drive the second corrector.
An optical pickup reading or writing bits of information from or onto an optical recording medium by radiating a light beam onto the optical recording medium and receiving the light beam reflected from the optical recording medium, comprising:
- a first corrector configured to correct an aberration of the light beam radiated onto the optical recording medium;
- and
- a second corrector configured to correct an aberration of the light beam reflected from the optical recording medium and to divide the reflected light beam into a plurality of light beams.
An aberration correcting method for correcting an aberration of a light beam radiated onto an object to be detected and then reflected from the object, the method comprising the steps of:
- driving a first driver;
- first correcting the aberration of the light beam radiated onto the object by using the first driver that has been driven;
- driving a second driver;
- and
- second correcting the aberration of the light beam reflected from the object and to divide the reflected light beam into a plurality of light beams by using the second driver that has been driven.
Dependencies are inferred from the claim text.