Title:
METHOD AND DEVICE FOR ADJUSTING INCLINATION OF OBJECTIVE LENS OF OPTICAL PICKUP DEVICE, AND MANUFACTURING METHOD THEREOF
Document Type and Number:
Japanese Patent JP3871325
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for adjusting the objective lens inclination for reducing the cost and adjusting time.
SOLUTION: The objective lens 15 is adjusted to have an inclination of θX0 by calculating a quadratic curve by a least square method from the quantities of received light (L1, L2, L3) at respective inclinations (θX1, θX2, θX3) in the direction of θX, and calculating therefrom an inclination θX0 which maximizes the quantities of the received light. Also in the direction of θY, the inclination of the objective lens is similarly adjusted to an inclination θY0 which maximizes the quantities of the received light. In such a manner, the objective lens 15 can be set to a correct attitude which minimizes coma, and also adjustment time can be reduced.
Inventors:
Hiromasa Furuta
Masataka Hayashi
Masataka Hayashi
Application Number:
JP2002377647A
Publication Date:
January 24, 2007
Filing Date:
December 26, 2002
Export Citation:
Assignee:
Thanks Co., Ltd.
International Classes:
G11B7/08; G11B7/22; (IPC1-7): G11B7/08; G11B7/22
Domestic Patent References:
| JP6162559A | ||||
| JP7201045A | ||||
| JP10091968A | ||||
| JP2001216668A | ||||
| JP2002182092A | ||||
| JP2004185673A |
Attorney, Agent or Firm:
Arisa Ushiro
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