US 12,339,165 B2
Methods and devices for standoff differential Raman spectroscopy with increased eye safety and decreased risk of explosion
Daryoosh Vakhshoori, Cambridge, MA (US); Romain Blanchard, Lexington, MA (US); Peili Chen, Andover, MA (US); Masud Azimi, Belmont, MA (US); Tobias Mansuripur, Cambridge, MA (US); Kalyani Krishnamurthy, Lincoln, MA (US); Arran M. Bibby, Savannah, GA (US); Fred R. Huettig, III, Sudbury, MA (US); Gokhan Ulu, Newton, MA (US); and Greg Vander Rhodes, Lexington, MA (US)
Assigned to Pendar Technologies, LLC, Cambridge, MA (US)
Filed by Pendar Technologies, LLC, Cambridge, MA (US)
Filed on Jan. 11, 2024, as Appl. No. 18/410,593.
Application 17/705,846 is a division of application No. 17/130,295, filed on Dec. 22, 2020, granted, now 11,300,448, issued on Apr. 12, 2022.
Application 17/130,295 is a division of application No. 16/351,174, filed on Mar. 12, 2019, granted, now 10,921,187, issued on Feb. 16, 2021.
Application 18/410,593 is a continuation of application No. 17/705,846, filed on Mar. 28, 2022, granted, now 11,885,681.
Application 16/351,174 is a continuation of application No. PCT/US2019/021312, filed on Mar. 8, 2019.
Claims priority of provisional application 62/793,601, filed on Jan. 17, 2019.
Claims priority of provisional application 62/692,657, filed on Jun. 29, 2018.
Claims priority of provisional application 62/678,065, filed on May 30, 2018.
Prior Publication US 2024/0159588 A1, May 16, 2024
Int. Cl. G01J 3/02 (2006.01); G01J 3/06 (2006.01); G01J 3/28 (2006.01); G01J 3/44 (2006.01); G01K 11/3213 (2021.01); G01K 11/324 (2021.01); H01S 3/00 (2006.01); H01S 3/094 (2006.01); H01S 3/108 (2006.01); H01S 3/30 (2006.01)
CPC G01J 3/0275 (2013.01) [G01J 3/0202 (2013.01); G01J 3/0208 (2013.01); G01J 3/0216 (2013.01); G01J 3/0224 (2013.01); G01J 3/0237 (2013.01); G01J 3/0248 (2013.01); G01J 3/0256 (2013.01); G01J 3/0264 (2013.01); G01J 3/0272 (2013.01); G01J 3/0286 (2013.01); G01J 3/06 (2013.01); G01J 3/2823 (2013.01); G01J 3/44 (2013.01); G01J 3/4406 (2013.01); G01J 3/4412 (2013.01); G01K 11/3213 (2013.01); H01S 3/0014 (2013.01); H01S 3/094046 (2013.01); H01S 3/1086 (2013.01); H01S 3/302 (2013.01); G01J 2003/4424 (2013.01); G01K 11/324 (2021.01); H01S 3/0071 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system for Raman spectroscopy, the system comprising:
a laser to emit a ranging beam;
a telescope, in optical communication with the laser, to illuminate a sample with the ranging beam;
a camera to acquire an image of a spot formed by the ranging beam on the sample;
a controller, operably coupled to the camera, to determine a focus of the telescope based on a position of the spot in the image;
an actuator, operably coupled to the controller and to the telescope, to adjust the focus of the telescope in response to a command from the controller;
a Raman pump laser, in optical communication with the telescope, to illuminate the sample with a Raman pump beam;
a spectrometer, in optical communication with the telescope, to measure a spectrum of a Raman signal scattered by the sample in response to the Raman pump beam;
a beam-steering element, in optical communication with the Raman pump laser and the telescope, to scan the Raman pump beam across the sample so as to reduce a risk of igniting the sample with the Raman pump beam; and
a touchscreen, operably coupled to the camera, to display the image of the sample to a user and to receive an input from a user.