US 11,719,626 B2
Ultra-miniature spatial heterodyne spectrometer
Seyedeh Sona Hosseini, Pasadena, CA (US)
Assigned to California Institute of Technology, Pasadena, CA (US)
Filed by California Institute of Technology, Pasadena, CA (US)
Filed on Mar. 30, 2021, as Appl. No. 17/218,130.
Claims priority of provisional application 63/002,034, filed on Mar. 30, 2020.
Prior Publication US 2021/0302305 A1, Sep. 30, 2021
Int. Cl. G01N 33/18 (2006.01); G01N 21/25 (2006.01); G01J 3/28 (2006.01); G01N 33/49 (2006.01); G01N 33/24 (2006.01); G01N 33/483 (2006.01)
CPC G01N 21/255 (2013.01) [G01J 3/2823 (2013.01); G01N 33/18 (2013.01); G01N 33/24 (2013.01); G01N 33/4833 (2013.01); G01N 33/49 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A field-deployable device for performing spectroscopy comprising:
a spatial heterodyne spectrometer (SHS) comprising a beam-splitter, a first grating, and a second grating, wherein the beam-splitter, the first grating, and the second grating form a 90° angle with the beam-splitter at the vertex of the angle; and wherein the beam-splitter is configured to split the incoming light to the first grating and the second grating; and
a spectroscopy sensor configured to acquire a fringe pattern generated by the SHS, wherein the spectroscopy sensor comprises a solid-state array without lenses;
wherein the SHS and the spectroscopy sensor are in optical alignment, such that light exiting from the SHS directly passes to the spectroscopy sensor without optics configured to direct the light to the spectroscopy sensor.