ANALIZZATORE DI COLORI

A color analyzer for determining the exposure time required for printing color photographs by an enlarger comprising a measuring unit having three photoelectric cells. The analyzer is further provided with a control unit being electrically connected to the measuring unit and having an electric circu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MAASSEN EGBERTUS JOHANNES PETRUS, MEEL FRANCISCUS ADRIANUS MISAEL MARIA VA
Format:	Patent
Sprache:	ita
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHY PHYSICS
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Beschreibung
Zusammenfassung:	A color analyzer for determining the exposure time required for printing color photographs by an enlarger comprising a measuring unit having three photoelectric cells. The analyzer is further provided with a control unit being electrically connected to the measuring unit and having an electric circuit for determining the exposure time. According to the present invention, the characteristic values of the color components, blue, green and red are measured by a respective photoelectric cell for a test print as electric signals generated by the cells at voltages of SBO, SGO, and SRO at the associated exposure time to. These values are stored in a memory and the exposure time t of an arbitrary picture is determined with the aid of measured signals SB, SG and SR for the components blue, green, and red. This determination is computed by way of the formula: t=3to/[(SB/SBO)+(SG/SGO)+(SR/SRO)].