US 11,835,459 B2
Textile brightness measurement system
Peyman Dehkordi, Knoxville, TN (US); Kent A. Rinehart, Knoxville, TN (US); and David D. McAlister, III, Knoxville, TN (US)
Assigned to Uster Technologies AG, Uster (CH)
Appl. No. 15/733,745
Filed by Uster Technologies AG, Uster (CH)
PCT Filed May 2, 2019, PCT No. PCT/CH2019/000014
§ 371(c)(1), (2) Date Oct. 13, 2020,
PCT Pub. No. WO2019/210436, PCT Pub. Date Nov. 7, 2019.
Claims priority of provisional application 62/666,125, filed on May 3, 2018.
Prior Publication US 2021/0156802 A1, May 27, 2021
Int. Cl. G01N 21/64 (2006.01); G01N 21/55 (2014.01); G01N 33/36 (2006.01)
CPC G01N 21/6456 (2013.01) [G01N 21/55 (2013.01); G01N 33/367 (2013.01); G01N 2021/6471 (2013.01); G01N 2201/062 (2013.01); G01N 2201/127 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An apparatus (100) for measuring reflected radiation and fluorescence of a textile sample (106), the apparatus (100) comprising:
a presentation subsystem (102) comprising a viewing window (108),
a radiation subsystem (114) comprising a tunable radiation source (120) for directing a desired radiation (122) having a wavelength range and an intensity through the viewing window (108) toward the sample (106), and causing the sample (106) to produce a fluorescence (124),
a sensing subsystem (126) comprising an imager (130) for capturing the reflected radiation and fluorescence (124) in an array of pixels (408), where each pixel (408) records an intensity of the fluorescence (124) at the pixel location, and
a control subsystem (132) comprising a processor (136) for controlling the presentation subsystem (102), the radiation subsystem (114), and the sensing subsystem (126), for creating a reflected radiation image and a fluorescence image (400) containing both spectral information and spatial information in regard to the reflected radiation and fluorescence (124) of the sample (106), and for processing both the reflected radiation and the fluorescence image (400) into a brightness image

OG Complex Work Unit Math
where:
a(λj) is weighting factor for the fluorescence image of wavelengths, where λmin<λj<λmax, j=1, 2, . . . , k,
b(λj) is weighting factor for the Luminance image of wavelengths, where λmin<λj<λmax, j=1, 2, . . . , k,
BI(λj) is the brightness image of the sample 106 for one or more ranges of wavelengths, where λmin<λj<λmax, j=1, 2, . . . , k,
FI(λj) is the fluorescence image of the sample 106 for one or more ranges of wavelengths, where λmin<λj<λmax, j=1, 2, . . . , k,
LI(λj) is the luminance image of the sample 106 for one or more ranges of wavelengths, where λmin<λj<λmax, j=1, 2, . . . , k,
n is the number of spatial points for the image in the horizontal direction,
m is the number of spatial points for the image in the vertical direction, and
ixy is the energy level of the sample at coordinate location of x and y at wavelength λj.