http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1166751-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2fc1e85c81dab31af8dab3f79fe62ea9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H03M1-26 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01D5-36 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01D5-249 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H03M1-00 |
| filingDate | 1981-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1984-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e2f4f6d912d072d32e9eb2494587dafc |
| publicationDate | 1984-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1166751-A |
| titleOfInvention | Optical systems for optical encoders |
| abstract | PATENT SPECIFICATION OPTICAL SYSTEMS FOR OPTICAL ENCODERS ABSTRACT OF THE DISCLOSURE An optical system for an optical encoder of the type having an optical code disc with a plurality of code tracks, and a multichannel photodetector for receiving modulated light from the code tracks, the optical system comprising a light source for producing a line of light, an optional col-limating lens for receiving divergent rays of light from said light source and for directing the light in generally parallel rays toward the code disc, an objective lens dis-posed between the collimating lens and the code disc for focussing the light in a sharp line on the code disc, a housing for supporting the collimating lens and having a seat for receiving the objective lens, an aperture plate having an aperture slit therein aligned with the objective lens, and means for holding the aperture plate on the housing with the objective lens retained between the seat and the plate. Flanges may be provided on the housing to retain the aperture plate, preferably in a flexed position in engagement with the objective lens, which may be cylind-rical, semicylindrical, or in the form of a doublet or a triplet. A grating may be substituted for the plate and the objective lens. In an alternative construction, the aperture plate may be molded into a cylindrical objective lens. |
| priorityDate | 1980-11-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 18.