| Spectral response of the Apogee light sensor. The
spectral response of the Apogee light sensor used in Quantum Meters (cat. no. BQM-01,
QSW-01, QSX-01, QSS-01) and the Quantum Sensor (cat. no. QMO-01) is shown at right. As the
figure indicates, the sensor underestimates the 400 to 500 nm wavelengths (blue light),
overestimates the 550-650 wavelengths (yellow and orange light, and has little sensitivity
above 650 nm (red light). Fortunately, common light sources are mixtures of colors and the
spectral errors offset each other.
Sensor error correction under different light sources
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