| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be055db3c1a09879df07379ba969e223 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1359
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1365
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B5-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1374
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G02B17-045 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B17-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G02B5-04 |
| filingDate |
1998-08-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
2001-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a6cdff7fc2c3c2674779e5820294325
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_36e44535cbbbd0b5f6336af0c94b2a3b |
| publicationDate |
2001-12-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-6327238-B1 |
| titleOfInvention |
Optical disk device |
| abstract |
A beam is emitted from a radiation source such as a semiconductor laser and is converted to parallel light by a collimator lens. The light enters a surface A of a prism at an incidence angle φ (an angle between the normal line of the surface A and the incident light), thus obtaining light refracted at a refraction angle ψ (an angle between the normal line and the refracted light). This refracted light is incident on the surface B of the prism to be reflected totally from this surface, and the reflected light is incident on the surface C of the prism. Then, the reflected light enters the surface B of the prism again and is transmitted through this surface. The transmitted light is converted to convergent light by an objective lens. The convergent light is transmitted through a surface of an optical disk substrate, thus being focused on a signal surface. An optical disk device that is thin beyond the physical limitations without changing the working distance and the numerical aperture can be obtained. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2400518-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009237670-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7489617-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6831886-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2400518-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005057798-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7518764-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8139288-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2006256697-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2002181385-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005083827-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7826330-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6611383-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11054621-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-03062897-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007165510-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6414930-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7177260-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2007189145-A1 |
| priorityDate |
1997-08-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |