| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13aa7b32ae00ed83af7dfaa0b6a1f7c2 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0006 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-24047
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1275
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1374
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-13922
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-13
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1392
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-08 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-125 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B3-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1374
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-18 |
| filingDate |
2001-05-14^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2002-06-11^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_46b0c844ce6d25ec27929c35f0b7543b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6eb94d6eeffd091eb34a6abee302d02 |
| publicationDate |
2002-06-11^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-490589-B |
| titleOfInvention |
Optical pickup apparatus, objective lens, apparatus for reproducing and/or recording optical information recording medium |
| abstract |
An optical pickup apparatus for at least two kinds of optical information recording media, comprises a first light source; a second light source; an optical converging system; and a photo detector. An optical element of the optical converging system comprises a first region including an optical axis and a second region adjoining the first region and locating at the outside of the first region, the first region is a reflective surface and the second region is a diffractive surface. When a first light flux passes through the second region, the light amount of n-th order diffracted ray of the first light flux is larger than that of any other order diffracted ray of the first light flux, and when a second light flux passes through the second region of the optical element, the light amount of n-th order diffracted ray of the second light flux is larger than that of any other order diffracted ray of the second light flux, where n is an integer except 0. |
| priorityDate |
2000-05-24^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |