Apparatus and method for directing a beam of light to a surface

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

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359837, 369112, G02B 2608

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active

058284826

ABSTRACT:
An apparatus is used with an optical disk drive for directing a beam of light to a surface of an optical disk. The apparatus has a beam shifter configured to direct the beam from a first path (along which the beam is generated) to a second path which is substantially parallel to the first path. An imaging lens is configured to direct the beam from the second path along a third path which passes near the front focal point of an objective lens (located near the surface of the disk). The third path and the first path diverge at an angle based on the distance separating the first and second paths.

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