http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2003228871-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_ee1c19da359446fb5c4f0458a57b783d |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G11B7-135 |
| filingDate | 2002-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d60a4c52bdd11a653e685b827733c8c4 |
| publicationDate | 2003-08-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2003228871-A |
| titleOfInvention | Optical head device |
| abstract | (57) [Problem] To reduce a change in resistance due to heating of an electrode of a phase correction element, to suppress a characteristic variation, and to produce with a high yield, and to provide a phase correction element with a small change in electrode resistance over time Thus, the device is mounted on the optical head device and has a low failure rate. A phase correcting element includes a liquid crystal 14 which is an anisotropic optical medium sandwiched between a pair of substrates 11 and 17, and a voltage applied to the liquid crystal 14 is provided on each of the opposing surfaces of the substrates 11 and 17. Electrodes 12 and 16 for application are formed, one of the electrodes 16 is made of a tin oxide thin film, and a phase correction element is formed in which a plurality of power supply portions 20 for voltage supply are formed at different positions. It is installed between the light source of the optical head device and the objective lens. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100394257-C |
| priorityDate | 2002-01-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 15.