Fig. 4: Performance of optical detection. | Communications Engineering

Fig. 4: Performance of optical detection.

From: Integration of acoustic, optical, and electrical methods in picoliter droplet microfluidics for rare particles enrichment

Fig. 4

a Effect of SAW and flow focusing on signals. bi The detection unit and its signals without the laser window. bii The detection unit and its signals with a 30 μm laser window. biii The detection unit and its signals with a 20 μm laser window. biv The detection unit and its signals with a 10 μm laser window. ci Microspheres are detected in the laser detection area. cii Microspheres passed through the laser detection area. The light-colored areas in (a, c) represent the noise band and the dark-colored areas represent the signal band. The calculated signal-to-noise ratio values are listed on the right side of each figure.

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