| 摘要 |
The present invention creates a current to voltage conversion system, comprised of an operational amplifier, which obtains a feedback current from an optical detector. The output of the operational amplifier controls the intensity of a light source whose optical energy is transmitted through an optical intensity reduction mechanism, to generate the feedback current. A separate light intensity measurement system is constructed to measure the output of the light source directly, bypassing the effects of the optical intensity reduction mechanism. By measuring the light source, the magnitude of the input current can be determined. The increased illumination created by using an optical reduction mechanism within the operational amplifier's feedback loop allows the separate light source intensity measurement system to be easily constructed using conventional technologies.
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