US 12,326,238 B2
Hyperspectral light source
Heikki Saari, Espoo (FI); Christer Holmlund, Espoo (FI); and Ingmar Stuns, Espoo (FI)
Assigned to Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
Appl. No. 18/710,236
Filed by Teknologian tutkimuskeskus VTT Oy, Espoo (FI)
PCT Filed Nov. 15, 2022, PCT No. PCT/FI2022/050749
§ 371(c)(1), (2) Date May 15, 2024,
PCT Pub. No. WO2023/089236, PCT Pub. Date May 25, 2023.
Claims priority of application No. 20216177 (FI), filed on Nov. 17, 2021.
Prior Publication US 2025/0003576 A1, Jan. 2, 2025
Int. Cl. F21V 14/08 (2006.01); F21V 9/08 (2018.01); F21V 9/40 (2018.01); F21Y 115/10 (2016.01)
CPC F21V 14/08 (2013.01) [F21V 9/08 (2013.01); F21V 9/40 (2018.02); F21Y 2115/10 (2016.08)] 13 Claims
OG exemplary drawing
 
1. A hyperspectral light source system, comprising:
a broadband light source arranged to generate and radiate a broadband light signal;
a rotating multi bandpass filter arranged to pass through a part of the broadband light signal on one of multiple passbands of the hyperspectral light source system, wherein a rotation angle of the rotating multi bandpass filter determines the part of the broadband light signal that passes through the rotating multi bandpass filter; and
a tunable filter adjusted to pass through the part of the broadband light signal, coming from the rotating multi bandpass filter, on said one passband of the hyperspectral light source system,
wherein the broadband light source is arranged to radiate a first broadband light signal during a first time interval to cause passing of the first broadband light signal on a first part of said one passband of the hyperspectral light source system through the rotating multi bandpass filter and to radiate a second broadband light signal during a second time interval to cause passing of the second broadband light signal on a second part of said one passband of the hyperspectral light source system through the rotating multi bandpass filter, and
a sensor arranged to monitor the angle of rotation of the rotating multi bandpass filter and transmit the monitored angle of rotation to a controller; the controller arranged to control timing of the broadband light source based on the monitored angle of rotation.