http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2013229902-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad7b684b681a6a25f78363a519ed9968 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ffb4142d53c703020f7866bd0f48cccf http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_df10f83e5c0bad141c4e87b5c54c0070 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B27-0025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0006 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1374 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-13922 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1353 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1275 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1367 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1275 |
| filingDate | 2011-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_23c949e9eb961056a1b8ef5b3a75d765 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_84ff0bbe30ea6076fbcea54e6bf707d9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_20223764d7dad66cb9cf22e0fa98f594 |
| publicationDate | 2013-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2013229902-A1 |
| titleOfInvention | Objective Lens for Optical Pickup Device, Optical Pickup Device, and Optical Information Recording/Reproducing Device |
| abstract | An optical pickup apparatus including an objective lens capable of enhancing temperature characteristics and wavelength characteristics, and which enables compatibility for three types of optical discs of BDs, DVDs, and CDs by using the objective lens in common, an optical information recording and reproducing apparatus, and an objective lens suitable for it. In a first optical path difference providing structure in which at least a first basic structure and a second basic structure are superimposed on each other, an amount of a level difference in an optical axis direction can be reduced, whereby it becomes possible to suppress the lowering of a diffraction efficiency when wavelength changes. Further, in the first basic structure and the second basic structure deterioration of the spherical aberration due to the change of the refractive index of the objective lens can be corrected by utilizing a phenomenon that the wavelength of the light source rises similarly due to a rise in the environmental temperature. |
| priorityDate | 2010-11-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 147.