| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_f0c17fb0be15e18e811be589c822b4c8 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B2027-0123
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B2027-015
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B2027-0118
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B2027-0147
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B2027-0178 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B27-283
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B27-286
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B17-023
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B26-101
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B26-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B27-0172 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B27-01
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B26-10
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B17-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B27-28 |
| filingDate |
2019-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7088e6357ced87134b33d66042418cd9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_351f8e4ffb472e539999cd072d9403fd
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9995f0b9931d6a7bb2834798acffe607 |
| publicationDate |
2021-03-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-2021072542-A1 |
| titleOfInvention |
Low-obliquity beam scanner with reflective polarizer |
| abstract |
A beam scanner of a projector-based near-eye display includes a prismatic element with a reflective polarizer and a quarter-wave waveplate (QWP). The beam-folding prismatic element receives a polarized light beam from a light source and couples the beam to a tiltable reflector, e.g. a 2D tiltable MEMS reflector, for angular scanning the beam. The light beam impinging onto the tiltable reflector is separated from the light beam reflected from the tiltable reflector by polarization. The polarization-based separation is achieved by causing the light beam to propagate through the QWP before and after impinging onto the tiltable reflector. Upon double propagation of the light beam through the QWP, the beam changes its polarization to an orthogonal polarization, which enables its separation from the impinging beam. The beam scanner may receive multiple light beams from multiple light sources. A projector and a near-eye display based on such beam scanners are also disclosed. |
| priorityDate |
2019-09-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |