| 摘要 |
The invention relates to measuring illuminating power of light incident on a light sensor without an outside power supply. The light is converted conventionally to a pulse train, the frequency of which varies as the illuminating power. During conversion the incident light illuminates a series connection (2) of a plurality of photo diodes, which thus generate a current. This is utilized as a power source for the converter and also as electrical input quantity for the conversion itself. The pulse train generated by the converter comprises light pulses, the frequency of which is detected at the converter or at the other end of an optical fibre (7) coupled to it. |
