| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_1af8df51ce24ca931ae718fb747f6aa0 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B5-742 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B6-032
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B5-704
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B3-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B17-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01R33-283
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B6-0407
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B5-055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G01R33-307
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/A61B6-03 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B17-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61B6-03
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/A61B5-055
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B3-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R33-30
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R33-28 |
| filingDate |
2020-02-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2022-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_274771476ff91f11be0d3e48db94c5ae |
| publicationDate |
2022-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-11409088-B2 |
| titleOfInvention |
Optical system |
| abstract |
In order to provide an optical system to be installed in a projection system which is capable of allowing a patient to view a clear image in a diagnostic imaging apparatus, the optical system according to the present invention includes a Fresnel lens having a base material and a plurality of annular sections arranged around a center axis on a reference surface of the base material, and a deflection element configured to deflect light from the Fresnel lens. In a cross section including the center axis, an inclination angle of the annular sections to the reference surface changes asymmetrically between from a middle point of one and other ends of the Fresnel lens to the one end and from the middle point to the other end. |
| priorityDate |
2019-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |