US 12,066,381 B2
Optical measuring device
Frédéric Fischer, Arnsberg (DE); Johann Witte, Fröndenberg (DE); and Ralf Marbach, Versmold (DE)
Assigned to CLAAS Selbstfahrende Erntemaschinen GmbH, Harsewinkel (DE)
Filed by CLAAS Selbstfahrende Erntemaschinen GmbH, Harsewinkel (DE)
Filed on Aug. 17, 2021, as Appl. No. 17/404,825.
Claims priority of application No. 102020122041.3 (DE), filed on Aug. 24, 2020.
Prior Publication US 2022/0057322 A1, Feb. 24, 2022
Int. Cl. G01N 21/359 (2014.01); A01D 41/12 (2006.01); A01D 41/127 (2006.01); G01N 21/33 (2006.01); G01N 21/31 (2006.01); G01N 21/85 (2006.01)
CPC G01N 21/359 (2013.01) [A01D 41/1208 (2013.01); A01D 41/127 (2013.01); G01N 21/33 (2013.01); G01N 2021/3155 (2013.01); G01N 2021/8592 (2013.01); G01N 2201/0642 (2013.01); G01N 2201/065 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An optical measuring device for spectral measurement of a sample, the optical measuring device comprising:
an integrating cavity at least a part of which has a diffusely reflective interior in order to render light in the integrating cavity diffuse;
at least one light source configured to emit light of a predetermined wavelength or predetermined wavelength range into the integrating cavity;
at least one sensor configured to receive the light from the integrating cavity;
wherein the integrating cavity comprises an optical opening;
wherein the optical measuring device is configured to measure a sample located outside of the integrating cavity directly in front of the optical opening;
further comprising a cover located inside the integrating cavity and configured to move within the integrating cavity so that no light passes through the optical opening; and
wherein the cover is located entirely inside the integrating cavity when moving from a position whereby the light passes through the opening to a position whereby no light passes through the opening.