Calibration of a focus error signal gain in a focus servo...

Details Calibration of a focus error signal gain in a focus servo... Calibration of a focus error signal gain in a focus servo...

2001-09-10

2008-08-19

Patel, Gautam R (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044290

Reexamination Certificate

active

07414940

ABSTRACT:
A calibration of a focus error signal gain in a focus servo system of an optical disk drive is presented. The focus error signal gain can be calibrated by oscillating an optical pick-up unit in a focus direction through a focus point and determining a focus sum threshold. The optical pick-up unit can then be oscillated around a focus control effort that results in a sum signal equal to the focus sum threshold and the peak-to-peak value of a focus error signal can be measured. The focus error signal gain can be determined from the peak-to-peak value of the focus error signal.

REFERENCES:
patent: 4352981 (1982-10-01), Sugiyama et al.
patent: 4513407 (1985-04-01), Bricot
patent: 4677602 (1987-06-01), Okano et al.
patent: 4682332 (1987-07-01), Okamoto et al.
patent: 4730295 (1988-03-01), Bressers
patent: 4761776 (1988-08-01), Opheij
patent: 4785451 (1988-11-01), Sako et al.
patent: 4791627 (1988-12-01), Yonezawa
patent: 4856108 (1989-08-01), Tinet
patent: 4862447 (1989-08-01), Opheij
patent: 4864118 (1989-09-01), Opheij et al.
patent: 4866692 (1989-09-01), Saito et al.
patent: 4878211 (1989-10-01), Suzuki et al.
patent: 4893298 (1990-01-01), Pasman et al.
patent: 4901300 (1990-02-01), Van Der Zande et al.
patent: 4959822 (1990-09-01), Pasman et al.
patent: 4972401 (1990-11-01), Carasso et al.
patent: 5014274 (1991-05-01), Higurashi et al.
patent: 5023854 (1991-06-01), Satoh et al.
patent: 5023856 (1991-06-01), Raaymakers et al.
patent: 5060219 (1991-10-01), Lokhoff et al.
patent: 5113384 (1992-05-01), McDonald et al.
patent: 5124966 (1992-06-01), Roth et al.
patent: 5136566 (1992-08-01), Iwazaki
patent: 5140580 (1992-08-01), Ohara et al.
patent: 5146443 (1992-09-01), Iwase et al.
patent: 5247494 (1993-09-01), Ohno et al.
patent: 5251194 (1993-10-01), Yoshimoto et al.
patent: 5295127 (1994-03-01), Verboom et al.
patent: 5333126 (1994-07-01), Fukuda et al.
patent: 5339301 (1994-08-01), Raaymakers et al.
patent: 5341356 (1994-08-01), Dieleman et al.
patent: 5347503 (1994-09-01), Koyama et al.
patent: 5377178 (1994-12-01), Saito et al.
patent: 5390159 (1995-02-01), Schylander
patent: 5408454 (1995-04-01), Hasegawa
patent: 5418764 (1995-05-01), Roth et al.
patent: 5425013 (1995-06-01), Fennema et al.
patent: 5434834 (1995-07-01), Shinoda et al.
patent: 5459712 (1995-10-01), Sugaya et al.
patent: 5467335 (1995-11-01), Braat
patent: 5479388 (1995-12-01), Gondou et al.
patent: 5491677 (1996-02-01), Sasaki
patent: 5587991 (1996-12-01), Nabeshima et al.
patent: 5610880 (1997-03-01), Watanabe et al.
patent: 5654947 (1997-08-01), Roth et al.
patent: 5663942 (1997-09-01), Ishibashi et al.
patent: 5729511 (1998-03-01), Schell et al.
patent: 5740143 (1998-04-01), Suetomi
patent: 5793737 (1998-08-01), Den Boef
patent: 5831946 (1998-11-01), De Bie
patent: 5835462 (1998-11-01), Mimnagh
patent: 5841739 (1998-11-01), Iida et al.
patent: 5850382 (1998-12-01), Koishi et al.
patent: 5862111 (1999-01-01), Arai
patent: 5875158 (1999-02-01), Schell
patent: 5881044 (1999-03-01), Park et al.
patent: 5886985 (1999-03-01), Kobayashi et al.
patent: 5896353 (1999-04-01), Naohara
patent: 5903530 (1999-05-01), Tateishi et al.
patent: 5966355 (1999-10-01), Kamiyama
patent: 5995462 (1999-11-01), Harold-Barry
patent: 6052344 (2000-04-01), Ueki
patent: 6087644 (2000-07-01), Schell
patent: 6154425 (2000-11-01), Iida et al.
patent: 6246646 (2001-06-01), Abe et al.
patent: 6252835 (2001-06-01), Choi
patent: 6442111 (2002-08-01), Takahashi et al.
patent: 6628580 (2003-09-01), Kishimoto et al.
patent: 6707772 (2004-03-01), Marrec et al.

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