| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fdad00677b9268c26e005a9e03a7b9dd |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-24044 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-083
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-0917
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-0065 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B5-58 |
| filingDate |
2008-03-13^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7dfba16915c9118740a16e32b8960b26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a30aef8f231654ca17425878fc801be5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_16cc6e0439edfd647f9255611b839a4d |
| publicationDate |
2008-10-02^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2008239905-A1 |
| titleOfInvention |
Focusing-error detecting device and holographic data-recording/reproducing apparatus having the device |
| abstract |
In a device for detecting a focus error in controlling a position in an optical axis, a laser beam is split into first and second beam components, and one of the first and second beam components is diverged or converged. Then, the first and second beam components are superposed on each other, providing a single laser beam. The single laser beam is applied to an optical data-recording medium through an objective lens. The first laser beam component is focused on a first focusing point that is set at one side of the pinhole. The second beam component is focused on a second focusing point that is set at the other side of the pinhole. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011098948-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7859974-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8820967-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2013522862-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009080318-A1 |
| priorityDate |
2007-03-28^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |