US 12,436,083 B2
Systems for detecting light by birefringent Fourier transform interferometry and methods for using same
Ihor V. Berezhnyy, Los Gatos, CA (US)
Assigned to BECTON, DICKINSON AND COMPANY, Franklin Lakes, NJ (US)
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed on Mar. 30, 2022, as Appl. No. 17/708,313.
Claims priority of provisional application 63/188,620, filed on May 14, 2021.
Prior Publication US 2022/0364978 A1, Nov. 17, 2022
Int. Cl. G01N 15/1429 (2024.01); G01N 15/1434 (2024.01)
CPC G01N 15/1429 (2013.01) [G01N 15/1434 (2013.01); G01N 2015/145 (2013.01); G01N 2015/1454 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A particle analyzer comprising:
a light source configured to irradiate a particle propagating through a flow stream;
a light detection system comprising:
a birefringent polarizing interferometer configured to generate interfering polarized beams of light;
a double telecentric lens configured to continuously convey light from the irradiated particle and maintain orthogonal incidence of the light across different positions on the birefringent polarizing interferometer as the particle is propagated through the flow stream; and
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; and
a processor comprising memory operably coupled to the processor wherein the memory comprises instructions stored thereon, which when executed by the processor, cause the processor to transform the photodetector signal pulses into spectral data signals.