http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012159664-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c547207a5943945b80f657e1f82f3140 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9235cd7dccd6b888c748673442694aa5 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B9-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-004 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-00 |
| filingDate | 2011-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5015978b5a7fa4c28b02cecd8e910b60 |
| publicationDate | 2012-08-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2012159664-A |
| titleOfInvention | Imaging lens |
| abstract | An imaging lens having a four-lens configuration having good optical characteristics, wide angle, small size, and Fno <2.6 is provided. An imaging lens LA includes, in order from a subject, an aperture S1, a biconvex positive power first lens L1, a negative power second lens L2 with a convex surface facing the object side, and a convex surface facing the image surface side. A positive third lens L3 having a positive power and a fourth lens L4 having a negative power having a convex surface directed toward the object side, and satisfying the following expression. 0.7 ≦ f1 / f ≦ 1.05, −1.8 ≦ f2 / f ≦ −1.2, −0.7 ≦ R1 / R2 ≦ −0.17, 4.0 ≦ R3 / R4 ≦ 70. 0, 0.1 ≦ d4 / f ≦ 0.2. However, f, f1, f2, f3, and f4 are the focal lengths of the entire first, second, third, and fourth lenses, and R1, R2, R3, and R4 are the first lenses on the side surfaces of the first lens object. The curvature radius of the second lens object side surface and the second lens object surface side surface of the image side surface, d4 indicates the axial distance from the second lens image surface side surface to the third lens object side surface. [Selection] Figure 1 |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I454727-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104122657-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2012208377-A |
| priorityDate | 2011-01-31-04:00^^<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/substance/SID419530175 http://rdf.ncbi.nlm.nih.gov/pubchem/compound/CID123105 |
Total number of triples: 19.