公开(公告)号：US3916168A

公开(公告)日：1975-10-28

申请号：US40456073

申请日：1973-10-09

Applicant: MOBIL OIL CORP

Inventor： MCCARTY WILLIAM H ,  JONES KENNETH A

IPC: G01J3/46 ,  C09D7/00 ,  G01J3/50 ,  G06F15/06 ,  G06F15/46

CPC classification number: G01J3/50 ,  G01J3/0251 ,  G01J3/463 ,  G01J3/501 ,  G01J3/504 ,  G01J3/524

Abstract: In the selection of metallic paint pigments to color match a standard metallic paint coating, the tri-stimulus coordinates of the coating are measured at a plurality of different viewing angles with respect to the surface. A colorimeter has a rotating plaque holder. Incident light passes through blue, green or red filters. The light is reflected from the plaque and is detected by a photocell. By changing the angle of the plaque, tri-stimulus coordinates of the plaque are measured at different viewing angles. The total reflectance of the coating on the plaque is measured in a spectrophotometer. From the measured tri-stimulus coordinates and the measured total reflectance, the measured diffuse and angular reflectance of the coating on the plaque is obtained. A model which relates both the diffuse and the angular reflectance to the concentration of paint pigments is generated on an automatic data processor. Least square fitting between measured and predicted diffuse and angular reflectance is used. A formulation program generates the concentrations of pigments to be used in the initial batch. Thereafter, a shading program successively generates the changes in pigment concentrations which give the best least squares fit to the standard coating.

Abstract translation: 在选择金属涂料颜料以与标准金属涂料涂层相匹配时，涂层的三刺激坐标以相对于表面的多个不同的视角测量。 色度计有一个旋转的牌圈座。 入射光通过蓝色，绿色或红色滤光片。 光从斑块反射并被光电池检测。 通过改变斑块的角度，在不同的视角测量斑块的三刺激坐标。 在分光光度计中测量斑块上涂层的总反射率。 从测量的三刺激坐标和测量的总反射率，获得测量的涂层在斑块上的漫射和角度反射率。 在自动数据处理器上产生将漫射和角度反射率与涂料颜料的浓度相关联的模型。 使用测量和预测的漫反射和角度反射率之间的最小二乘拟合。 制剂程序产生在初始批次中使用的颜料浓度。 此后，阴影程序依次产生颜色浓度的变化，其给予标准涂层最佳最小二乘法。