Many years ago I wrote about QuantumSi and compared their chips to PacBio’s. At that time it seemed relatively clear that the PacBio design used 2 channels. Their patents show a stack up with two filters built into the chip, and a SEM image of the same device:
Is The Revio A Single Color System?
Is The Revio A Single Color System?
Is The Revio A Single Color System?
Many years ago I wrote about QuantumSi and compared their chips to PacBio’s. At that time it seemed relatively clear that the PacBio design used 2 channels. Their patents show a stack up with two filters built into the chip, and a SEM image of the same device: