| 摘要 |
<p>An overexposure indicator for an automatic electronic flash produces a time factor signal of a given duration after an emission terminate signal is delivered to an electronic flash. When the amount of flashlight emitted by the electronic flash reaches an arbitrary multiple of a proper value of exposure, a detection output is produced. The indicator indicates the occurrence of an overexposure whenever detection output is produced during the time the time factor signal is present.</p> |
