US 11,927,536 B2
Spectroscopic apparatus and methods
Brian John Edward Smith, Dursley (GB)
Assigned to RENISHAW PLC, Wotton-under-Edge (GB)
Appl. No. 17/277,895
Filed by RENISHAW PLC, Wotton-under-Edge (GB)
PCT Filed Oct. 17, 2019, PCT No. PCT/GB2019/052966
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/079439, PCT Pub. Date Apr. 23, 2020.
Claims priority of application No. 1817028 (GB), filed on Oct. 19, 2018.
Prior Publication US 2021/0349030 A1, Nov. 11, 2021
Int. Cl. G01N 21/65 (2006.01)
CPC G01N 21/65 (2013.01) [G01N 2201/12 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of smoothing spectral data recorded by a spectrometer, the method comprising:
successively fitting a plurality of spline curves to the spectral data,
each spline curve having a different number of knots, and
a knot position of each knot, other than end point knots, in each spline curve being determined based upon a measure of fit to the spectral data of points of a previously fitted one of the plurality of spline curves having fewer knots;
selecting one of the spline curves as a smoothed data curve of the spectral data based upon a model selection criterion;
analyzing the smoothed data curve to identify a property of a sample that generated the spectral data; and
controlling a process and/or carrying out further processing on the sample based upon the identified property.