| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dea97595058f316a875c28a64efb90da |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F41G7-001
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N25-671
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F41G7-2253
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F41G7-2293
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N5-33 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J5-48
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N5-365 |
| filingDate |
1995-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d992ead30dcf254aa9890b42f9d8e87e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e9d324dd04b95c7d95b3463dee672ae
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b20be47cd90bcf38cb1239dc87279deb
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9c94945b8fbb6b3fcc1d4753b087fb95 |
| publicationDate |
1997-03-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
GB-2303988-A |
| titleOfInvention |
Thermal imaging system with detector array calibration mode |
| abstract |
A thermal imaging system including an array of photon detectors 14 produces a detector-dependent response to irradiation. Variations in individual detector characteristics produce a fixed pattern noise which degrades the image. The system 10 incorporates a switchable mirror M1 . With the mirror M1 at a calibration positio n P cal , infrared radiation from a light emitting diode 20 is directed on to the detector array 14 . The diode 20 is both a negative and positive luminescent emitter; the flux emitted is current controlled to be equivalent to black body radiation at a range of temperatures both colder and hotter than ambient. Calibration relationships comprising transfer functions relating incident intensity to signal response are derived for each detector. With the mirror M1 at a scene observation position P obs , infrared radiation from a remote scene reaches the detector array 14 . Resulting detector signals are converted into corrected fluxes using individual calibration relationships previously derived and an image with reduced fixed pattern noise is obtained. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6414294-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9917542-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2344247-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2344247-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7433097-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2400768-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2400768-A |
| priorityDate |
1995-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |