Dust-proof structure for optical pickup unit

Details Dust-proof structure for optical pickup unit Dust-proof structure for optical pickup unit

1996-08-23

1998-08-04

Renner, Craig A.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specified detail of transducer assembly support structure

369 72, 360 9702, G11B 3314

Patent

active

057905118

ABSTRACT:
An optical pickup unit is formed such that a portion on an upstream side of the air flow has a streamline shape or similar shape to the streamline shape so as to keep the air flow generated with high speed rotations of a disc-shaped recording medium away from a vicinity of an objective lens. According to this arrangement, dust contained in the air flow can be prevented from adhering to the surface of the objective lens. Moreover, the dust will not enter inside the optical pickup unit through a small clearance between a lens holder of the objective lens and a cover for the optical pickup unit.

REFERENCES:
patent: 4583213 (1986-04-01), Bracken et al.
patent: 5086422 (1992-02-01), Hagiya et al.
patent: 5109368 (1992-04-01), Ohta et al.
patent: 5200945 (1993-04-01), Engler et al.
patent: 5301178 (1994-04-01), Okabe et al.
patent: 5418775 (1995-05-01), Okatani
patent: 5426628 (1995-06-01), Ishii

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