http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002236252-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_13aa7b32ae00ed83af7dfaa0b6a1f7c2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-00 |
| filingDate | 2001-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5fc8021c0e0017467ec52bec3dbfecaa http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0330b8c1bd3e9f0662f4de3736a97947 |
| publicationDate | 2002-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2002236252-A |
| titleOfInvention | Objective lens, coupling lens, condensing optical system, optical pickup device and recording / reproducing device |
| abstract | (57) [Summary] (With correction) [Problem] To provide a high-performance objective lens corresponding to a high numerical aperture of the objective lens, a coupling lens having a simple and inexpensive configuration capable of correcting axial chromatic aberration, and various optical elements. Provided are a light-collecting optical system and an optical pickup device that can effectively correct fluctuations in spherical aberration generated on a surface. SOLUTION: The objective lens includes a first lens having a positive refractive power and a second lens having a positive refractive power arranged in order from the light source side, and each of the first lens and the second lens has a specific gravity of 2.0 or less. It is formed from a material or a plastic material and satisfies the following equation: NA ≧ 0.70 (NA: a predetermined image-side numerical aperture necessary for performing recording or reproduction on an optical information recording medium). The coupling lens converts the degree of divergence of the divergent light flux from the light source, makes the divergent light incident on the objective lens, and converts the divergent light flux by 1 to The axial chromatic aberration was overcorrected so that the focal length became longer for a wavelength shorter by 0 nm. The condensing optical system and the pickup device include the objective lens and the coupling lens described above, Further, a spherical aberration correction unit is provided. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7706227-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7253968-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1596384-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1596384-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7133332-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2004164825-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2007026616-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100651326-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008217004-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7417938-B2 |
| priorityDate | 2000-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID962 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419512635 |
Total number of triples: 30.