http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3819373-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_60a983c4814ee74f0c6441114cdf3456 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03B27-73 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03B27-735 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03B27-73 |
| filingDate | 1972-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1974-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0dfc40666473131be95451af824115f5 |
| publicationDate | 1974-06-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3819373-A |
| titleOfInvention | Apparatus for determining exposure parameters for making prints from color transparencies |
| abstract | This invention relates to a method and apparatus for determining a set of exposure parameters for making prints from positive or negative color transparencies. The apparatus comprises diffusion means for breaking up the full-color image to a degree where integrated component illumination readings may be taken thereof; filter means operative to selectively pass red, blue or green light; illumination-level comparison means operative to indicate when the level of illumination of two like color components equal one another; a calibrated light-flux attenuator of a type adapted to cooperate with the illumination level comparison means to define the time interval correction necessary to equate the total quantity of light delivered by like components at different levels of illumination; and, an uncalibrated light-flux attenuator adapted to vary the level of illumination of all three color components of a full-color projected image equally either up or down and in so doing cooperate with the illumination level comparison means to validate the scale of the calibrated lightflux attenuator. The novel method comprises choosing a time interval for one of the three primary color components of the unknown transparency equal to that of the like component of the standard transparency found to produce a satisfactory response in the color print-making material; attenuating the light-flux of the chosen component of the unknown transparency to the same predetermined degree said component was attenuated in the standard transparency for calibration purposes; matching the level of illumination of the chosen component of the unknown transparency to the reference level of the like component of the standard transparency by changing the levels of illumination of all three components to the same degree independently of the previous attenuation; matching the level of illumination of a second component of the unknown transparency to the reference level of illumination of the like component of the standard transparency by independently varying the level of illumination of said second component relative to the other two; correcting the exposure time for said second component by the interval necessary to compensate for the degree to which the level of illumination thereof had to be changed before it matched the reference level of illumination of the like component from the standard transparency; matching the level of illumination of the third component of the unknown transparency to the reference level of illumination of the like component of the standard transparency by independently varying the level of illumination of said third component relative to the first and second; and, correcting the exposure time for said third component by the interval necessary to compensate for the degree to which the level of illumination thereof had to be changed before it matched the reference level of illumination of the like component from the standard transparency. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4309496-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2011157584-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0802450-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4931827-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-8502029-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0261074-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-11154946-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4413050-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4783684-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4632558-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2015375326-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5767950-A |
| priorityDate | 1972-05-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.