Detection system for droplet-based assays
First Claim
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1. A method of detection for droplets, comprising:
- illuminating an examination region of a channel with first pulses of light and second pulses of light as droplets of an emulsion pass through the examination region, the first pulses being spectrally distinct from and having a same pulse frequency as the second pulses; and
collecting data representing light detected during illumination of the examination region with the first pulses and the second pulses;
wherein each droplet is illuminated with a beam of light that is narrower than a diameter of the droplets such that no more than a portion of the droplet is illuminated by the beam of light at any given time.
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Abstract
System, including methods and apparatus, for light detection and signal processing for droplet-based assays. An exemplary system provides a method of detection for droplets. An examination region of a channel may be illuminated with first pulses of light interleaved with second pulses of light as droplets pass through the examination region, the first pulses being spectrally distinct from the second pulses. Data may be collected representing light detected during illumination of the examination region with the first pulses and the second pulses. Each droplet may be illuminated with a beam of light that is narrower than a diameter of the droplets.
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Citations
22 Claims
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1. A method of detection for droplets, comprising:
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illuminating an examination region of a channel with first pulses of light and second pulses of light as droplets of an emulsion pass through the examination region, the first pulses being spectrally distinct from and having a same pulse frequency as the second pulses; and collecting data representing light detected during illumination of the examination region with the first pulses and the second pulses; wherein each droplet is illuminated with a beam of light that is narrower than a diameter of the droplets such that no more than a portion of the droplet is illuminated by the beam of light at any given time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for detection in droplet-based assays, comprising:
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a channel; an illumination assembly including a light source and a slit and configured to produce a beam of light that illuminates an examination region of the channel as droplets pass through such region; a detector configured to detect light received from the examination region; and a controller that collects data representing light detected by the detector, wherein light from the light source is shaped by the slit such that the beam of light is elongated in cross section where the beam intersects the channel; and wherein the beam of light at the examination region is narrower than the diameter of each droplet such that no more than a portion of the droplet is illuminated by the beam of light at any given time. - View Dependent Claims (10, 11, 12)
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13. A method of detection for droplets, comprising:
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illuminating an examination region of a channel with first pulses of light and second pulses of light as droplets of an emulsion pass through the examination region, the first pulses being spectrally distinct from and having a same pulse frequency as the second pulses; and collecting data representing light detected during illumination of the examination region with the first pulses and the second pulses. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification