http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2005293815-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be92719b856db86c092cc233e9512ca2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate | 2004-09-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4cd93311a94dfd41f3c35953fba906d6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_21a38a34955e9e156d20255b861498aa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dad08133092ecee786b2ac8226d96452 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a479d21241adc97284899582b1c7d22f |
| publicationDate | 2005-10-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2005293815-A |
| titleOfInvention | Optical pickup device, diffractive optical element, and method of manufacturing diffractive optical element |
| abstract | In a diffractive optical element manufactured by optical interference exposure, track signal offset and focus signal deterioration due to a knife edge method are effectively avoided. Diffractive optical element 51 'that diffracts the return light beam reflected by the light and guides it to the light detecting means, and that uses a master diffractive optical element original plate 51 that substantially produces only 0th-order diffracted light and + 1st-order diffracted light. And has three or more diffraction areas including a diffraction area 51a ′ for focus signal detection and diffraction areas 51b ′ and 51c ′ for track signal detection. Grating vectors V50 ′, V51 ′, V52 ′ are set so as to be diffracted toward the predetermined light receiving areas 52a, 52b, 52c, and each diffraction area is Do not overlap each other. [Selection] Figure 1 |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2011118075-A |
| priorityDate | 2004-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.