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Home › Laser detector grating unit (LDGU) for producing focus error, a push-pull tracking error, and differential phase tracking error signals

Laser detector grating unit (LDGU) for producing focus error, a push-pull tracking error, and differential phase tracking error signals

US Patent 5856961 · Granted Jan 5, 1999

Estimated economic value: $8,556,000 ⓘ

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