PROBLEM TO BE SOLVED: To constitute an optical grain evaluation device performing the quality evaluation of grain stored in a storage chamber in as a compact manner as possible.SOLUTION: The optical grain evaluation device includes a housing 73 having a base wall 730 arranged to be adjacent to the wall body of a storage chamber 50 as one side surface, an optical measurement head 43 having a light projection surface 416 and a light receiving surface 426 attached to a through-hole 731 provided in the base wall 730 and facing the storage chamber and attached to the through-hole provided in the base wall, a light source unit stored in the housing 73 and supplying light to the optical measurement head 43, and a grain evaluation unit stored in the housing 73 and performing grain evaluation based on the spectroscopic measurement of the light from the optical measurement head 43.COPYRIGHT: (C)2015,JPO&INPIT【課題】貯留室に貯留される穀粒の品質評価を行う光学式穀粒評価装置を出来るだけコンパクトに構成すること。【解決手段】貯留室50の壁体に隣接配置されるベース壁730を一側面として有する筐体73と、ベース壁730に設けられた貫通孔731に装着され、貯留室に臨む投光面416と受光面426とを有するとともにベース壁に設けられた貫通孔に装着される光学測定ヘッド43と、筐体73に収納されるとともに、光学測定ヘッド43に光を供給する光源ユニットと、筐体73に収納されるとともに、光学測定ヘッド43からの光の分光測定に基づいて穀粒評価を行う穀粒評価ユニットとが備えられている。【選択図】図3
