Method of forming birefringent structures in an optical element
US-12265245-B2 · Apr 1, 2025 · US
with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following · Cooperative Patent Classification (CPC)
Computing, optics, measurement, and control technologies.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | G11B7/09 |
| Official title | with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following |
| Display label | with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following |
| Total patents | 31 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 1 |
| 2022 | 1 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Optical storage medium
US-2024055020-A1 · Feb 15, 2024 · US
Method of forming birefringent structures in an optical element
US-2022268983-A1 · Aug 25, 2022 · US
Method for backing up and restoring disc management information
US-11068358-B2 · Jul 20, 2021 · US
Method for backing up and restoring disc management information
US-2020341865-A1 · Oct 29, 2020 · US
Optical module for optical height measurement
US-10724845-B2 · Jul 28, 2020 · US
Optical module for optical height measurement
US-2019293406-A1 · Sep 26, 2019 · US
Optical information recording device and optical information recording method
US-9984717-B2 · May 29, 2018 · US
Record playback apparatus
US-9966099-B2 · May 8, 2018 · US
Information recording and playback device
US-9899051-B2 · Feb 20, 2018 · US
Record playback apparatus
US-2017270958-A1 · Sep 21, 2017 · US
Optical disc apparatus controlling irradiation position based on cross-correlation value between reproduction signal and decoded signal
US-2017256280-A1 · Sep 7, 2017 · US
Optical disc apparatus controlling irradiation position based on cross-correlation value between reproduction signal and decoded signal
US-9754619-B1 · Sep 5, 2017 · US
Optical information reproduction device and optical information reproduction method
US-9728219-B2 · Aug 8, 2017 · US
Recording/reproducing apparatus and recording medium
US-9607648-B2 · Mar 28, 2017 · US
Optical disk apparatus, control method, control program and information storage medium
US-9460748-B2 · Oct 4, 2016 · US
Information recording and playback device
US-2016163347-A1 · Jun 9, 2016 · US
Adaptive control of tracking servo system of optical heads in optical storage devices
US-9336812-B1 · May 10, 2016 · US
Method and apparatus for writing and using servo correction data
US-9318146-B2 · Apr 19, 2016 · US
Optical disk apparatus, control method, control program and information storage medium
US-9311950-B2 · Apr 12, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC G11B7/09?
- CPC G11B7/09 is the Cooperative Patent Classification code for “with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following.”
- How many patents are filed under CPC G11B7/09 (with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following)?
- Our database includes 31 publications tagged with this CPC code.
- Is patent activity under CPC G11B7/09 growing?
- Publication counts under this code: 1 in 2024 vs 1 in 2025 (latest complete years).