http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-20050007182-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0e7f7286c46e676b1bc0daf37b9f6c63 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B2007-0006 |
| classificationCPCInventive | 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/G11B7-13922 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1367 |
| 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/G11B7-1374 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1275 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1367 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-1392 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate | 2004-07-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_55465a83925c5e8c6375a0ac3f47826d |
| publicationDate | 2005-01-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-20050007182-A |
| titleOfInvention | Lens and optical system, optical head and optical disk apparatus using lens |
| abstract | According to the present invention, a light beam can be focused on an information recording surface with high light utilization efficiency for each of a plurality of types of optical recording media having different thicknesses of transparent substrates.n n n In the lens according to the present invention, a common use area for all monochromatic light in one lens surface of a multi-wavelength lens for condensing a plurality of monochromatic light of wavelength lambda i is divided into a plurality of aspherical portions having different refractive powers. When the stepped amount in the direction parallel to the lens optical axis in the adjacent portions of each aspherical surface portion adjacent to each aspherical surface is Dj in the order close to the lens optical axis, each wavelength ( When the minimum value of Aij for λi) is MIN (Aij) and the maximum value is MAX (Aij), the following expression is satisfied.n n n MAX (Aij) / MIN (Aij) <3n n n Where Aij = absolute value (Bij-mij), Bij = (absolute value (Dj)) * (ni-1) / λi-C, ni: refractive index of the lens at wavelength (λi), mij: closest to Bij Integer, C: Correction term. |
| priorityDate | 2003-07-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 31.