US 11,852,529 B2
Signal collection spectrometer
Moti Margalit, Munich (DE); Haim Ben Amram, Munich (DE); Roni El Bahar, Munich (DE); Limor Shahak, Munich (DE); Emir Haleva, Hod Hasharon (IL); and Shuki Maman, Hod Hasharon (IL)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO.,LTD., Guangdong (CN)
Filed on Oct. 13, 2021, as Appl. No. 17/499,894.
Application 17/499,894 is a continuation of application No. PCT/EP2019/059761, filed on Apr. 16, 2019.
Prior Publication US 2022/0026271 A1, Jan. 27, 2022
Int. Cl. G01J 3/02 (2006.01); G01J 3/28 (2006.01); G01J 3/36 (2006.01); G01J 3/44 (2006.01); G02B 6/42 (2006.01); G01J 3/12 (2006.01)
CPC G01J 3/0205 (2013.01) [G01J 3/0272 (2013.01); G01J 3/2803 (2013.01); G01J 3/36 (2013.01); G01J 3/44 (2013.01); G02B 6/4215 (2013.01); G02B 6/4298 (2013.01); G01J 2003/1213 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A spectrometer for measuring frequency components of light from a sample, comprising:
a light guide for receiving light from the sample, wherein the light guide has an entrance surface disposed at a longitudinal end of the light guide for the light from the sample to enter the light guide, and a side exit surface for the light to exit the light guide, the light guide has a longitudinal direction, and the side exit surface extends on a side of the light guide along the longitudinal direction and has a surface normal perpendicular to the longitudinal direction of the light guide;
a linear variable filter disposed alongside the light guide and adjacent to the side exit surface of the light guide, wherein linear variable filter has a longitudinal direction parallel to the longitudinal direction of the light guide, the light exiting the light guide through the side exit surface passes through the linear variable filter and is filtered by the linear variable filter, the linear variable filter comprises an array of bandpass filters having different filtering wavelength bands that depend on positions of the bandpass filters in the linear variable filter;
a detector array comprising a plurality of photodetectors, the detector array being disposed adjacent to the linear variable filter to receive the light passing through and filtered by the linear variable filter.