| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a7b097bfd3f350ed27ffa53e1f114d1a |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-225
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-18
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B15-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B15-16 |
| filingDate |
2004-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5cf3e3331df7bffd29c92da3add1883c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fce71b6f34198729de439e0758606e28 |
| publicationDate |
2006-01-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
JP-2006003548-A |
| titleOfInvention |
Variable magnification optical system and electronic apparatus using the same |
| abstract |
PROBLEM TO BE SOLVED: To provide a variable magnification optical system and an electronic device that can sufficiently secure a back focus at a wide angle end and can effectively achieve both cost reduction and downsizing. In a variable power optical system in which a lens group G1 closest to the object side has a negative refractive power and further includes at least a second lens group G2 and a third lens group G3 in order from the object side, the following conditions are satisfied. Satisfies the equation. 2 <f w / d w23 <100 (1) Here, f w is the focal length of the entire system at the wide angle end, and d w23 is the group interval between the second lens group and the third lens group at the wide angle end. [Selection] Figure 1 |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2013120193-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017068637-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2008209727-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2017068660-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-10634883-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115268009-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-115268009-B |
| priorityDate |
2004-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |