Optical pickup apparatus with protected collimator lens

Details Optical pickup apparatus with protected collimator lens Optical pickup apparatus with protected collimator lens

2007-08-28

2011-11-22

Danielsen, Nathan (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C720S652000

Reexamination Certificate

active

08064318

ABSTRACT:
There is provided an optical pickup apparatus in which the collimator lens cannot be scratched before the support base for the objective lens actuator is fixed, and further dust can hardly come in and be deposited to result in contaminating the collimator lens and thereby degrading the performance for recording and/or reproduction. A pair of movement limiting walls11and11for limiting the horizontal movement of a support base3for an objective lens actuator2are formed on the upper surface of a base chassis1as contact prevention means for preventing the support base3from coming into contact with a collimator lens5before the support base3is fixed. The movement limiting walls11and11prevent the support base3from coming into contact with and scratching the collimator lens5. Each movement limiting wall11has a wall length equal to or greater than the diameter of the collimator lens5to serve as a dust prevention wall, whereby dust can hardly come in and be deposited to result in contaminating the collimator lens5and thereby degrading the performance for recording and/or reproduction.

REFERENCES:
patent: 6625091 (2003-09-01), Obara
patent: 2001/0028628 (2001-10-01), Suzuki et al.
patent: 08-161756 (1996-06-01), None
patent: 2001-319342 (2001-11-01), None
patent: 2004-199724 (2004-07-01), None

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