CPC G01N 29/2425 (2013.01) [G01N 21/1702 (2013.01); G01N 29/022 (2013.01); G01N 29/036 (2013.01); G01N 29/2443 (2013.01); G02B 5/008 (2013.01); G01N 2021/1704 (2013.01); G01N 2021/1708 (2013.01); G01N 2291/0217 (2013.01); G01N 2291/02809 (2013.01); G01N 2291/106 (2013.01)] | 7 Claims |
6. A photoacoustic detection system comprising:
a series of piezoelectric tuning forks arranged side-by-side along an axis, each of the piezoelectric tuning forks having a unique resonant frequency and each of the piezoelectric tuning forks having first and second tines that straddle the axis so as to form a resonance cavity,
wherein each of the piezoelectric tuning forks has an opening defined between tips of the first and second tines, and each opening is oriented at a different clocked position about the central axis without a continuous gap between the openings.
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