Aspects of the present disclosure include systems for detecting light from a particle by birefringent interferometry. Systems according to certain embodiments include a light source configured to irradiate a particle propagating through a flow stream, a light detection system that includes a birefringent polarizing interferometer configured to generate interfering polarized beams of light, a light adjustment component configured to continuously convey light from the irradiated particle across different positions on the birefringent polarizing interferometer as the particle is propagated through the flow stream, a photodetector configured to detect interference patterns of the interfering polarized beams of light generated by the birefringent polarizing interferometer from light collected from the irradiated particle and generate a photodetector signal pulse in response to each detected interference pattern. Systems also include a processor for transforming the photodetector signal pulses into spectral data signals. Methods for detecting light with the subject systems are also described. Kits having one or more components for detecting light according to the subject methods are also provided.

Aspects of the present disclosure include systems for detecting light from a particle in a flow stream by spectral discrimination. Systems according to certain embodiments include a light source configured to irradiate a particle propagating along a flow stream through an interrogation region, a light detection system that includes a wavelength separator component configured to pass light having a predetermined spectral range across the wavelength separator, a light adjustment component configured to continuously convey light from the irradiated particle across the wavelength separator as the particle is propagated along the flow stream through the interrogation region and a photodetector configured to detect light conveyed across the wavelength separator. Systems also include a processor for generating a photodetector signal pulse in response to light detected from the wavelength separator. Methods for detecting light with the subject systems are also described. Kits having one or more components for detecting light according to the subject methods are also provided.

Certain aspects of the present disclosure generally relates to devices and methods for determining, treating, and/or isolating cells of interest, e.g., within a mixture of cells. In some cases, the cells may be cells infected with viruses, such as coronaviruses. In some embodiments, blood samples (or other biological fluids, such as saliva) may be treated with a pH-sensitive entity. The pH-sensitive entity may be one that is able to change color or otherwise produce a signal in suitable internal environments. For example, cells infected by viruses, such as coronaviruses, may have differences in intracellular pH compared to other cells, which can be detected, for example, using pH-sensitive entities. In certain embodiments, the cells may be sorted based on such signaling entities; for example, illumination of cells in a suitable machine for sorting cells (e.g., using fluorescent light) may allow determination of the cells, which may also be recovered or isolated for further manipulation in some cases.

Disclosed herein include systems, devices, methods, and spillover editor for displaying and editing spillover values. A view of a spillover editor can comprise a triangular grid of rows and columns, representing flourophores, each comprising at least one display area and two spillover values. After receiving an adjusted spillover value, an adjusted view of the spillover editor can comprise adjusted plots determined using the adjusted spillover value.

Techniques for analyzing bioparticles are described. The techniques may involve a microchip for bioparticle analysis. The microchip may include at least one channel configured to provide a flow path for one or more biological particles and at least one optic configured to receive fluorescence generated by irradiating at least some of the one or more biological particles in the flow path with at least one light beam. The at least one optic may have a surface configured to direct the fluorescence. A first portion of the surface may be configured to receive the at least one light beam. The first portion may have a different curvature that at least one second portion of the surface.

Novel methods and apparatus for sorting and enriching target cells of interest from a mixture.

Microfluidic devices, systems and methods are described herein. The devices, systems and methods provide for trapping particles, including cells. Methods of generating a droplet in a microfluidic device and collecting droplets from microfluidic devices are also disclosed herein.

A system and method for isolating and analyzing single cells, wherein the system includes: an array of wells defined at a substrate, each well including an open surface and a well cavity configured to capture cells in one of a single-cell format and single-cluster format, and a fluid delivery module including a fluid reservoir superior to the array of wells through which fluid flow is controlled along a fluid path in a direction parallel to the broad face of the substrate; and wherein the method includes: capturing a population of non-cell particles into the array of wells in single-particle format; releasing, from the non-cell particles, a set of probes into the array of wells; capturing a population of cells into the array of wells in single-cell format; releasing biomolecules from each captured cell into the array of wells; and generating a set of genetic complexes comprising the biomolecules associated with a single captured cell and a subset of probes within individual wells of the array of wells.

Described herein are microfluidic devices and methods that can greatly improve cell quality, streamline workflows, and lower costs. Applications include research and clinical diagnostics in cancer, infectious disease, and inflammatory disease, among other disease areas.

Disclosed herein include systems, devices, and methods for determining a gating strategy. An acquisition system can cause a particle analyzer to collect parameter measurements of some particles of a sample. An analysis system can receive the parameter measurements and determine a gating strategy from the parameter measurements. The acquisition can collect measurements of some or all of the remaining particles of the sample using the gating strategy determined by the analysis system.