An optical system includes an optical illumination source, an optical receiver, a correlation determination circuit, and an ambient condition control circuit. The optical illumination source is configured to emit a light in the direction of a target object. The optical receiver is configured to receive a combined optical signal that includes an ambient light component combined with an interrogation component. The correlation determination circuit is configured to compare the combined optical signal with an ambient light signal to identify a correlation factor. The ambient condition control circuit is configured to compare the correlation factor to a low correlation threshold value and a high correlation threshold value, and, based on the correlation factor exceeding the low threshold value and being less than the high correlation threshold value, cancel the ambient light component from the combined optical signal to produce an interrogation signal including the interrogation component.
