| 摘要 |
The light detector is a light meter having a processor receiving a signal from a photoelectric device. The processor compares the signal to a lower threshold of a user-selectable light intensity range to determine if the signal is greater than or equal to the lower threshold. If the signal is greater than or equal to the lower threshold, a timing counter counts. If the signal falls below the lower threshold of the user selected range, the timing counter is inhibited from counting. For any given period of use, the amount of time that light is at or above the lower threshold is recorded and displayed. Alternatively, lower and upper thresholds are used to limit timing to a user specified light intensity range. Counter and light intensity data are stored in processor memory and can be wirelessly transmitted via an on-board wireless transmitter to a receiving station.
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