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Light Modulation Photo IC

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Light Modulation Photo IC

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Light modulation photo ICs were developed to optically detect objects. Optical detection of objects usually uses a photosensor/light emitter pair, like a photointerrupter and photoreflector which detect an object when it interrupts or reflects light. However, detection errors might occur if fluctuating background light such as room lighting strikes the photosensor. To prevent these detection errors, one typical method uses optical filters by utilizing the difference in wavelengths between the signal light and background light. Light modulation photo ICs deal with this problem by using a synchronous detection method to reduce detection errors and ensure a stable output even if fluctuating background light strikes the photosensor.

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