http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1168325-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5be24746c885fb09eed50d9fa40392de |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01J3-1804 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01J3-18 |
| filingDate | 1967-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8d832e3e13beafc373d839cdff3ac19d |
| publicationDate | 1969-10-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1168325-A |
| titleOfInvention | Improvements in Spectrographs |
| abstract | 1,168,325. Spectrographs. HILGER & WATTS Ltd. March 6, 1968 [March 14, 1967], No. 11928/67. Heading G2J. In a spectrograph having, as shown in the Figure, an entrance slit 1, a collimating mirror 2, a plane grating 4, a spherical converging mirror 5 and a photographic plate 6, a compound lens 3, whose total power is nearly zero, is placed in front of the grating to reduce coma and spherical aberration practically to zero over the whole spectral range. In the embodiment shown, the compound lens has two components, one having a positive power and the other a negative power of substantially equal magnitude. Alternatively, the compound lens may have three or more elements, provided that the total power is nearly zero, and each lens may be made of vitreous silica or of any material which is transmissive over the whole spectral range. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007014708-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2007014708-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7456957-B2 |
| priorityDate | 1967-03-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 22.