Optical scanning device

Details Optical scanning device Optical scanning device

2006-04-04

2006-04-04

Healy, Brian M. (Department: 2883)

Optical waveguides

Optical waveguide sensor

C385S025000, C385S088000, C385S092000, C385S129000, C385S130000, C369S044180, C369S044220, C369S044260

Reexamination Certificate

active

07024061

ABSTRACT:
An optical scanning device (21) is for scanning with a radiation beam a substantially circular track of an information layer (22). The device includes: (i) a radiation source (26) for providing the radiation beam (34), (ii) a lens system (27) for transforming the radiation beam to a scanning spot (38) in the information layer, the lens system including a first objective lens assembly (39) having an optical axis (CC′), (iii) a head rotation unit (59) for the first objective lens assembly which is rotatable about an axis of rotation (BB′), and (iv) first driving means (60) for rotating the head rotation unit about the axis of rotation. The center of curvature of the track substantially coincides with the axis of rotation. According to the invention, the objective lens assembly is movable substantially in a radial direction with respect to and perpendicular to the axis of rotation.

REFERENCES:
patent: 4074085 (1978-02-01), Russell
patent: 4321700 (1982-03-01), Russell
patent: 5235583 (1993-08-01), Jongenelis et al.
patent: 5289442 (1994-02-01), Van Rosmalen
patent: 5708638 (1998-01-01), Braat et al.

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