http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2532840-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ef828e4865c5b27c84557791a7d74659 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-008 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-001 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B13-18 |
| 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/G02B13-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B13-06 |
| filingDate | 2015-09-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13d001d8161f0d1804c581abb64f0c65 |
| publicationDate | 2016-06-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-2532840-A |
| titleOfInvention | Wide-angle lens |
| abstract | A wide-angle lens 1 for infrared radiation, suitable for use in a cooled infrared camera, has two lens element groups 2, 3 arranged along an optical axis A. The groups have a plurality of lens elements 22, 24, 26, 28, 32, 34 and there is also a detector unit 4 which may consist of a Focal Plane Array (FPA), filter, cold-light diaphragm and window. The lens element group nearest the object 2 has a negative refractive power and the lens element group nearest the image 3 has a positive refractive power. The quotient of the back focal length s' and the focal length f is greater than 3.5 and may be less than 4.5. The quotient of the distance L from the first lens element 22 closest to an object to the image plane and the focal length f is less than 15 and may be greater than 12. The lens element closest to the object may consist of silicon or sapphire and may also have spherical shaping. The object-side element group may consist only of lenses with a negative refractive power and the image-side element group may consist only of lenses with a positive refractive power. |
| priorityDate | 2014-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.