http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004084202-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b7317808024e524eea40a6c5a5ad6a22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_6024341f412ef6de11f7e427a56c3fef http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ad7d498762f03b0bdadf7c39c0fcde36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a27a4195703fa5358392bca97246e3ba |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-135 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-126 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G11B7-1367 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate | 2004-03-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d43dba958d9e77b5e2981b8914ce662b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_756b15959132617efe3239a5a92720ff http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e32c9e1631d0e2a9bcfef40e98821430 |
| publicationDate | 2004-09-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | WO-2004084202-A1 |
| titleOfInvention | Optical scanning device |
| abstract | An optical scanning device for scanning an optical record carrier comprising an information layer. Crosstalk cancellation is provided using a phase modulating element (40, 140) for generating a phase profile providing an annular spot shape for a subsidiary beam which is coaxial with the main beam. The phase profile varies with an azimuthal angle measured about the optical axis of the beam portion. Further, a grating element (6, 106) is provided to generate two side beams. Each of the side beams and the subsidiary beam are focused to respective spots on the information layer along with the main beam spot. A radiation detector arrangement (25, 125) is provided for detecting information signals in each of the main beam, the two side beams and the subsidiary beam, and a signal processing arrangement (41, 42, 43, 44, 46, 47, 49) conducts crosstalk cancellation between the respective information signals to generate an output information signal. The invention provides a four-channel crosstalk cancellation arrangement which is capable of providing significantly improved crosstalk canceling performance. |
| priorityDate | 2003-03-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.