| 摘要 |
A digital indication exposure meter includes a photoelectric transducer circuit which produces an output current proportional to the intensity of lights incident to a photoelectric element, said transducer circuit including a circuit wherein an integrating capacitor is charged up by a photoelectric current of the photoelectric element in a manner that the voltage across both ends of the capacitor is proportional to the logarithm of the quantity of light received during a time of light measuring, a timer circuit which produces electric signals corresponding to the time of light measuring, an analog-digital converter which converts the analog output signal of the voltage in the integrating capacitor into a digital form and retains the information in a digital form, a coding circuit which is set to produce digital signals corresponding to film sensitivity, an adder circuit which computes the digital output of the analog-digital converter together with the digital information from the coding circuit, a decoder for converting the digital output from the adder into another digital output suitable for numeral displaying, and numeral displaying devices for indicating the output of the decoder.
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