Optics: measuring and testing – Plural test
Reexamination Certificate
2006-05-12
2008-11-18
Geisel, Kara E (Department: 2877)
Optics: measuring and testing
Plural test
C369S047500, C369S116000
Reexamination Certificate
active
07453557
ABSTRACT:
A temperature compensating method and apparatus uses a front sensor to measure a first power of a light-emitting unit emitting a light, and a thermal sensor to measure the temperature of the light-emitting unit. The temperature is inputted into an I/O unit to figure out a second power from the equations of the temperature and power. Then, the first and second powers are inputted into a controller to adjust the power of the light-emitting unit, or the second powers are inputted into a write strategy to change an output clock to adjust the energy of the light without changing the power of the light-emitting unit. The optical disc device has the effect of the temperature compensation.
REFERENCES:
patent: 6856633 (2005-02-01), Nasu et al.
patent: 2004/0027949 (2004-02-01), Matsuura et al.
Chen Shang-Hao
Huang Shih-Jung
Geisel Kara E
Hsu Winston
Nur Abdullahi
Quanta Storage Inc.
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