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US 6,724,711 B2Granted
Apparatuses and methods for directing light beams in an optical recording system
AssigneeImation Corp.
InventorMahdad Manavi
Life of this patent
Estimating the term…
Abstract
A rotatable optical wedge rotatable between a first position and a second position in an optical recording system directs a light beam to a position on a recording medium. The position of the incident light beam is adjustable by moving the optical wedge to different positions, including the first and second positions.
Claims19
An optical apparatus comprising:
- a reflective member oriented to reflect a light beam;
- and
- a first rotatable wedge disposed relative to the reflective member such that the reflected light beam, upon passing through the first rotatable wedges is directed to a position on a recording medium according to a position of the first rotatable wedge.
An optical recording apparatus comprising:
- a light source to emit a first light beam;
- a beam-splitting component positioned to receive the first light beam;
- a rotatable wedge positionable within the path of a reflected portion of the first light beam from the beam-splitting component to direct the reflected portion to a mirror;
- the mirror directing the reflected portion back to the rotatable wedge such that the reflected portion is incident upon a recording medium.
1 more element
A method of performing a read-after-write operation in an optical recording system, the method comprising:
- directing a light beam to a polarizing beam-splitter to split the light beam into a first portion and a second portion;
- positioning an optical wedge in the path of one of the first and second portions reflecting from the polarizing beam-splitter;
- rotating the optical wedge to a first position, the optical wedge directing the one of the first and second portions to a mirror such that the one of the first and second portions returns to the optical wedge to be aligned to an incident position on a recording medium.
Dependencies are inferred from the claim text.