US 12,111,209 B2
Compact diffraction limited near infrared (NIR) spectrometers and related detectors
Robert H. Hart, Cary, NC (US); and Peter Strobel, Eggersriet (CH)
Assigned to LEICA MICROSYSTEMS NC, INC., Durham, NC (US)
Appl. No. 17/296,282
Filed by Leica Microsystems NC, Inc., Durham, NC (US)
PCT Filed Nov. 22, 2019, PCT No. PCT/US2019/062737
§ 371(c)(1), (2) Date May 24, 2021,
PCT Pub. No. WO2020/112521, PCT Pub. Date Jun. 4, 2020.
Claims priority of provisional application 62/772,754, filed on Nov. 29, 2018.
Prior Publication US 2022/0018712 A1, Jan. 20, 2022
Int. Cl. G01J 3/02 (2006.01); G01B 9/02 (2022.01); G01B 9/02091 (2022.01); G01J 3/28 (2006.01); G01J 3/45 (2006.01); G02B 9/10 (2006.01); G02B 27/30 (2006.01)
CPC G01J 3/0291 (2013.01) [G01B 9/02044 (2013.01); G01B 9/02091 (2013.01); G01J 3/0208 (2013.01); G01J 3/0221 (2013.01); G01J 3/0256 (2013.01); G01J 3/0272 (2013.01); G01J 3/0286 (2013.01); G01J 3/2803 (2013.01); G01J 3/45 (2013.01); G02B 9/10 (2013.01); G02B 27/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A spectrometer system comprising:
a detector array;
an imaging lens assembly coupled to the detector array, the imaging lens assembly including a first element of positive optical power followed by a second element of negative optical power and a positive optical power element split into two opposing identical singlets;
a dispersive element coupled to the imaging lens assembly; and
a fixed focus collimator assembly coupled to the dispersive element, wherein the dispersive element and the fixed focus collimator are integrated together as a rigid piece such that the rigid piece is non-adjustable in all dimensions, wherein the dispersive element is positioned between a positive element of the fixed focus collimator assembly and the first element of positive optical power of the imaging lens assembly, and wherein a fiber of the collimator is fixed and non-adjustable.