| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4fdbbbf610950d8adb4a6f35904d9176
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ee1c19da359446fb5c4f0458a57b783d
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7588636579fb2eb47aec04f11e2b94ca
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_511acd94a61370c9bfc981d5e6d91329 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0006 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1369
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-3083
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1365 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate |
2005-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_efc6c26451169d802ae7b515750bb9a6
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c9b9a679af5a9cfc857a0b5aca6a5480
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2cfb6b56bb425233bb542c200ef64d57 |
| publicationDate |
2006-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
WO-2006030789-A1 |
| titleOfInvention |
Optical head |
| abstract |
An optical head comprising a wideband phase plate capable of converting linearly polarized light having three or more different wavelengths into circularly polarized light. The optical head is provided with a wideband phase plate in which two phase plates (9A, 9B) are so laid in layers through adhesive that their optical axes intersect each other. The wideband phase plate has a phase difference characteristic such that the ratios of the retardation values <R(λ1)/ R(λ3)> and <R(λ2)/ R(λ3)> at respective wavelengths are smaller than 1 and <R(λ1)/ R(λ3)> is smaller than <R(λ2)/ R(λ3)> for at least one of the two phase plates if the wavelengths of incident linearly polarized light are λ1, λ2 and λ3 (λ1<λ2<λ3). |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008198244-A |
| priorityDate |
2004-09-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |