http://rdf.ncbi.nlm.nih.gov/pubchem/patent/KR-100711118-B1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-281 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-0035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B1-041 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B9-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B9-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B1-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B15-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B15-163 |
| filingDate | 2005-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2007-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2007-04-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | KR-100711118-B1 |
| titleOfInvention | Wide angle short throw lens |
| abstract | An object of the present invention is to realize a high performance and compact wide-angle lens system by effectively using an aspherical surface with a small number of lenses.n n n To this end, for example, a positive first lens G1 made of glass material, an aperture stop St, a positive second lens G2 made of an aspherical lens made of plastic material, and plastic A negative third lens G3 made of an aspherical lens of material is provided in order from the object side, and the following conditional expression is satisfied. f is the paraxial focal length of the entire lens system, f3 is the paraxial focal length of the third lens G3, R1 is the radius of curvature of the object-side surface of the first lens G1, and θ is half the maximum image height. The angle of view is shown.n n n 0.8 <R1 / f <1.0 (1)n n n -2.0 <f3 / f <-1.0 (2)n n n 0.70 <tanθ <0.80 (3)n n n n Wide-angle lens, short throw lens |
| priorityDate | 2004-03-30-04:00^^<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/CID61156 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID419551646 |
Total number of triples: 22.