http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0922573-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9469ba607964c642d9dd7d6e4931e6bf |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B41C1-1033 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N1-4015 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H04N1-40037 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N1-401 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41C1-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41C1-05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23K26-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H04N1-40 |
| filingDate | 1998-12-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a319ab6865c3b35fed8e4dfd865bb73d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e1d35480317e324096058b9c9025da1d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c5068c327ec8b02d30f005014c47df63 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_03a91b738565d82b74801ec91d8af022 |
| publicationDate | 1999-06-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0922573-A2 |
| titleOfInvention | Method and apparatus for diode-laser imaging with compensation for output variations |
| abstract | Compensation for the effects of duty cycle on the output level of an imagingndevice, and for the effects of periodically varying distance between the output of thenimaging device and its target, is accomplished electronically. An exemplary apparatusnincludes a source of radiation (generally a laser) having an output level that varies bothnwith an input power level and, undesirably, with the duty cycle. The apparatus alsonincludes means for focusing the radiation onto a recording surface, and a power supplynfor driving the radiation source. In the case of a diode laser, the power supply deliversna variable current, the magnitude of which determines the power output of the laser.nThe radiation source is operated to produce, on the recording surface, an imagewisenpattern of spots, and an adjustment facility alters the output of the power supply toncompensate for output-level variations resulting from duty cycle―that is, from the recentnpattern of laser activity. In a first embodiment, the invention includes an up-downncounter that receives, as input, the same binary image data in serial form that is used tondetermine the state of the radiation source as it scans over a recording mediumn(causing actuation of the source only when adjacent to a location on the recordingnmedium that is to be written). The counter increments during clock cycles when thenradiation source is active, and decrements during inactive cycles. As a result, the statenof the counter generally reflects the recent pattern of radiation-source activity, and itsncontents are used to address a list of correction values. In a second embodiment, serialnimage data is applied to a shift register rather than a counter. This provides a morenprecise record of the pattern of recent activity, and the instantaneous contents of thenregister are once again used to address a list of correction values. To compensate fornthe effects eccentric rotation on the output level of an imaging device, a function thatninverts or at least counteracts the resulting power variations is applied to the powernsupply operating the radiation source. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CZ-297292-B6 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7280132-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1179425-A2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1176545-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1179425-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7375858-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-10035848-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6836282-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1349367-A3 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1349367-A2 |
| priorityDate | 1997-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 40.