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KMID : 0372919920130030201
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Journal of Biomedical Engineering Research
1992 Volume.13 No. 3 p.201 ~ p.208
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A Study on the Promotion of Indirect Light Receiving Efficiency
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Abstract
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In the indirect optical bio-telemetry, high frequency response and low minimum detectable optical power can be achieved by using photodiode with small light receiving area which minimizes junction capacitance. But, on the other hand, SJW ratio becomes low because the optical signal current is small. To solve such a problem, we attach plato-convex lens in front of photo diode, The results of comput- er simulation and experiments suggest promotion of light receiving efficiency and possibility of multi- telemetry system through directivity of convex lens in one room.
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