公开(公告)号：US11965779B2

公开(公告)日：2024-04-23

申请号：US17763957

申请日：2020-10-28

Applicant: TimeGate Instruments Oy

Inventor： Lauri Kurki ,  Ilkka Alasaarela ,  Jussi Tenhunen

IPC: G01J3/44 ,  G01J3/02 ,  G01J3/14 ,  G01J3/18 ,  G01J3/26

CPC classification number: G01J3/44 ,  G01J3/0208 ,  G01J3/0218 ,  G01J3/0297 ,  G01J3/14 ,  G01J3/1895 ,  G01J3/26 ,  G01J2003/262

Abstract: An apparatus for measuring time-resolved optical spectrum includes a light source, a sensor for collecting, forming, manipulating and measuring the intensity of the optical radiation, and a controller coupled to the light source and sensor. The sensor includes at least one optical delay element to provide a time delay to a first portion of the optical radiation. The sensor arrangement further includes an optical spectral disperser to split the delayed first portion and the second portion of the optical radiation into dispersed radiation having a plurality of wavelengths, and a sensor element configured to receive each wavelength of the dispersed radiation on a different spatial region, and measure the light intensity associated with each wavelength of the dispersed radiation. The controller collects the light intensity associated with each wavelength of the dispersed radiation measured by the sensor element to form a time-resolved optical spectrum.

公开(公告)号：US11592680B2

公开(公告)日：2023-02-28

申请号：US17563705

申请日：2021-12-28

Applicant: TimeGate Instruments Oy

Inventor： Lauri Kurki ,  Ilkka Alasaarela

IPC: G02B27/14 ,  G01N21/65 ,  G02B6/42

Abstract: An apparatus for measuring spectral components of Raman-scattered light emitted by target. The apparatus includes: pulsed laser light source to emit light; probe optics to direct light towards target and to collect light scattered by target; optical spectrometer including: input divider to divide collected light into first and second light beams; first spectrograph including input apertures for receiving said light beams and optical disperser to disperse said light beams; second spectrograph comprising input apertures and output apertures; and spatial light modulator to receive dispersed first and second light beams and to selectively provide at least part of at least one of dispersed first and second light beams to input aperture of second spectrograph which reverses dispersion of light beam and focuses light beam to output aperture; detector element to measure spectral components of light beam exiting output aperture. Optical spectrometer further includes delay line(s) line for delaying light beam(s).

公开(公告)号：US20220373392A1

公开(公告)日：2022-11-24

申请号：US17763957

申请日：2020-10-28

Applicant: TimeGate Instruments Oy

Inventor： Lauri Kurki ,  Ilkka Alasaarela ,  Jussi Tenhunen

IPC: G01J3/44 ,  G01J3/02 ,  G01J3/14 ,  G01J3/26 ,  G01J3/18

Abstract: An apparatus for measuring time-resolved optical spectrum includes a light source, a sensor for collecting, forming, manipulating and measuring the intensity of the optical radiation, and a controller coupled to the light source and sensor. The sensor includes at least one optical delay element to provide a time delay to a first portion of the optical radiation. The sensor arrangement further includes an optical spectral disperser to split the delayed first portion and the second portion of the optical radiation into dispersed radiation having a plurality of wavelengths, and a sensor element configured to receive each wavelength of the dispersed radiation on a different spatial region, and measure the light intensity associated with each wavelength of the dispersed radiation. The controller collects the light intensity associated with each wavelength of the dispersed radiation measured by the sensor element to form a time-resolved optical spectrum.

公开(公告)号：US20220221730A1

公开(公告)日：2022-07-14

申请号：US17563705

申请日：2021-12-28

Applicant: TimeGate Instruments Oy

Inventor： Lauri Kurki ,  Ilkka Alasaarela

IPC: G02B27/14 ,  G02B6/42 ,  G01N21/65

Abstract: An apparatus for measuring spectral components of Raman-scattered light emitted by target. The apparatus includes: pulsed laser light source to emit light; probe optics to direct light towards target and to collect light scattered by target; optical spectrometer including: input divider to divide collected light into first and second light beams; first spectrograph including input apertures for receiving said light beams and optical disperser to disperse said light beams; second spectrograph comprising input apertures and output apertures; and spatial light modulator to receive dispersed first and second light beams and to selectively provide at least part of at least one of dispersed first and second light beams to input aperture of second spectrograph which reverses dispersion of light beam and focuses light beam to output aperture; detector element to measure spectral components of light beam exiting output aperture. Optical spectrometer further includes delay line(s) line for delaying light beam(s).