| 摘要 |
PROBLEM TO BE SOLVED: To decrease noises proportionate to the capacity of input capacitance in a light detection device. SOLUTION: An electrostatic recorder 10 is constituted by laminating a first conductive layer 1, a recording light conductive layer 2, an electric charge transportation layer 3, a reading light conductive layer 4 and a second conductive layer 5 in order of mention. The recording light conductive layer 2 shows electrical conductivity by being irradiated with recording light L1 that has passed through the conductive layer 1. The electric charge transportation layer 3 acts as an approximate insulant to electric charges borne on the conductive layer 1 and as an approximate electric conductor to electric charges whose polarity is reverse to those of the electric charges on the conductive layer 1. The reading light conductive layer 4 shows electrical conductivity by being irradiated with reading light L2. The second conductive layer 5 is equipped with a stripe electrode 6 that has penetrability to the reading light L2. Each of linear electrodes constituting the stripe electrode 6 is divided approximately in the center into two parts and each partial linear electrode 6b is connected with a current detection amplifier 70a to detect the current flowing between the conductive layer 1 and each partial linear electrode 6b.
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