| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cdd94f212dc7aef02fc1dcf28fa9b4fd |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0006 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1378
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1376
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1365
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1374
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1275
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1392
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-18 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-125
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-00 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B3-08 |
| filingDate |
2003-09-29^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5976a8a4b6bc8fd297cd5bfa63827441
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6bff802c9339ea6f3483eb1af27abc36 |
| publicationDate |
2004-06-16^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
TW-200409959-A |
| titleOfInvention |
Optical element, objective optical element and optical pickup device |
| abstract |
An optical element comprises: a diffractive structure having a plurality of diffracting ring-shaped zones arranged around an optical axis on at least one optical surface; and an optical path difference giving structure arranged on an optical surface of at least one of the plurality of diffracting ring-shaped zones, for giving a prescribed optical path difference to a prescribed light beam passing through the diffracting ring-shaped zone, wherein the optical surface of the diffractive structure is a structure having a diffracting function for setting L-th (L≠0) order diffracted light of the light beam having the first wavelength λ1 to a maximum diffraction efficiency and for setting M-th (M≠0) order diffracted light of the light beam having the second wavelength λ2 to a maximum diffraction efficiency in case of an assumption of no existence of the optical path difference giving structure. |
| priorityDate |
2002-09-30^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |