US 11,940,454 B2
Optical reader for analyte testing
Ashutosh Shastry, Santa Clara, CA (US); David Piehler, Los Gatos, CA (US); Hardeep Sanghera, San Jose, CA (US); Michael Gluzczack, Los Gatos, CA (US); Pranav Chopra, Los Gatos, CA (US); Yun-Pei Chang, Arcadia, CA (US); and Ameya Kantak, Los Gatos, CA (US)
Assigned to ASPIDA DX INC., Horsham, PA (US)
Filed by ASPIDA DX INC., Horsham, PA (US)
Filed on Feb. 28, 2022, as Appl. No. 17/683,325.
Application 17/683,325 is a continuation of application No. 16/223,096, filed on Dec. 17, 2018, granted, now 11,262,367.
Claims priority of provisional application 62/599,674, filed on Dec. 15, 2017.
Claims priority of provisional application 62/599,671, filed on Dec. 15, 2017.
Prior Publication US 2022/0283191 A1, Sep. 8, 2022
Int. Cl. G01N 33/94 (2006.01); G01N 21/64 (2006.01); G01N 33/487 (2006.01)
CPC G01N 33/94 (2013.01) [G01N 21/6445 (2013.01); G01N 33/487 (2013.01); G01N 2021/6439 (2013.01); G01N 2201/0221 (2013.01); G01N 2201/0612 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of reading optical signals from a photonic chip of a removable cartridge in an optical reader, the method comprising:
aligning a scan head of the optical reader with the chip so that a laser source, a plurality of fibers, and an optical sensor of the scan head are aligned along a polarization axis with the chip;
maintaining a polarization of the polarization axis in a transverse-magnetic (TM) polarization; and
emitting one or more beams of light from the laser source, through the plurality of fibers and into an edge of the photonic chip in the TM polarization; and
detecting, in the optical sensor, TM polarized light from one or more waveguides within the chip when the one or more beams of light interact with an analyte molecule on the chip.