Photoelectronic precision logarithmic light meter

• DOI: 10.1364/ao.17.000138
• Publication Date: 2008-11-24T15:33:40Z
• Authors: P. Kundu; A. Kar
• Keywords: Instrumentation

The natural law of open circuit voltage response a silicon junction photovoltaic cell has been combined here with that obtained across the similar but nonilluminated due to an injected current, based on which temperature independent, precision logarithmic light meter is developed. range corresponds almost photosensitive in present case 10(-1)-10(+4) ix. over-all theoretical checked experimentally at several points, and accuracy found be well within 1% over ambient change about +/-3 degrees C. potentially very useful instrumentation requiring analog computation optical signals.