http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8704937-B2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ed49694541cc96d8ee63d03d0ee99d5b http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_212d642b5632025c13a6b2bc0202586b http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1fa596911fe768b0d5d38d12762cd990 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-004 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N23-667 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-225 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B9-34 |
| filingDate | 2013-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2014-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_beeaaebb85b7ec74e7aa406711ee7420 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_723ec6cab834dbd528da9256abc22887 |
| publicationDate | 2014-04-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-8704937-B2 |
| titleOfInvention | Imaging optical system, imaging device, and digital apparatus |
| abstract | An imaging optical system, an imaging device, and a digital apparatus have a four lens construction with positive, negative, positive, and negative refractive powers. A surface position at the maximum effective diameter of the second lens element is located on the object side than a surface vertex thereof. The fourth lens element has an inflection point at a position other than the intersection of the optical axis and the fourth lens element. The optical system satisfies the following conditions.n n0.7< f 1/ f <5n n−0.8<( RS 1+ RS 2)/( RS 1− RS 2)<3n n−3<( RS 3+ RS 4)/( RS 3− RS 4)<2n n0.03< d 2/ TL <0.2n n2 W >72n nν4>50, andn n0.55< Y/TL <0.8n where f1 is a focal length of the first lens element, f is a focal length of the entire optical system, RS1, RS3, RS2, RS4 are curvature radii of the object-side surface and the image-side surface of the first and second lens elements, d2 is an optical axis distance between the first and second lens elements, TL is a total length of the entire optical system, W is a maximum half angle of view, ν4 is an Abbe number of the fourth lens element, and Y is a maximum image height. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2015114667-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10890757-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015331223-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2019049696-A1 |
| priorityDate | 2012-04-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.