http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2012269051-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b6f11507d69645ae05d0eb350d293b9 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_453e70ae3f7bec6f314da3bba0acb0a7 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0013 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1374 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1374 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate | 2010-11-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_82b61bc583cc0ef33cb77f825ed0dd55 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0a81eb77d676e3b2a7ae84cf3353aaf7 |
| publicationDate | 2012-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2012269051-A1 |
| titleOfInvention | Objective Lens for Optical Pickup Device and Optical Pickup Device |
| abstract | Disclosed are an objective lens for optical pickup device and an optical pickup device that are capable of recording/reproducing information for an optical disc having multilayered information recording surfaces with achieving compactness and reduced cost. In the objective lens and the optical pickup device, under the assumption that T MAX (mm) is a maximum transparent substrate thickness among transparent substrate thicknesses of the optical disc, magnification M under the condition that the spherical aberration (λrms) is minimized at transparent substrate thickness T (mm) satisfying the following expression (1), satisfies the following expression (2), and an offense against the sine condition has a positive maximum value in an area between 70 percent and 90 percent of the radius of the effective aperture at the magnification M: T MAX ×0.85≦T≦T MAX ×1.1 (1), −0.003≦M≦0.003 (2). |
| priorityDate | 2009-11-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 214.