公开(公告)号：US4344709A

公开(公告)日：1982-08-17

申请号：US147854

申请日：1980-05-08

申请人： Theodore Provder ,  Richard M. Holsworth ,  Mark E. Koehler

发明人： Theodore Provder ,  Richard M. Holsworth ,  Mark E. Koehler

IPC分类号： G01N21/47 ,  G01N21/55

CPC分类号： G01N21/4738

摘要： A method and apparatus for photogoniometric analysis of surfaces is disclosed. A photogoniometric instrument includes a light source (12) for providing a collimated beam of light illuminating a test surface (18). A light detector (20) is mounted for rotation about the point of intersection of the illuminating beam on the test surface. A motor (44) drives the detector through a range of reflectance angles, and a microcomputer (52) digitizes the detector output periodically, storing the digitized data words in its memory (68). These stored words define a photogoniometric curve (FIG. 2A) including a specular portion (FIG. 2D) and a nonspecular, or diffuse, portion (FIG. 2C). A host computer (62) receives the photogoniometric data from the microcomputer, deconvolutes the data into spectral and diffuse portions, and analyzes the two portions separately from one another. To accomplish this deconvolution, the host computer subtracts from the photogoniometric data the actual reflectance characteristic of a standard surface whose characteristic lacks the specular peak. This diffuse standard reflectance characteristic is stored in the host computer memory in the form of a mathematical equation which has been curve fitted to the actual reflectance characteristics of the diffused standard.

摘要翻译： 公开了一种用于表面光电分析的方法和装置。 光电仪器包括用于提供照射测试表面（18）的准直光束的光源（12）。 光检测器（20）被安装成围绕测试表面上的照明光束的交点相互旋转。 电机（44）通过一定范围的反射角度驱动检测器，并且微计算机（52）周期性地对检测器输出数字化，将数字化数据字存储在其存储器（68）中。 这些存储的字定义包括镜面部分（图2D）和非特定或漫射部分（图2C）的光电图曲线（图2A）。 主计算机（62）从微型计算机接收光电图数据，将数据解卷积成光谱和漫射部分，并将这两个部分彼此分离。 为了完成这个去卷积，主计算机从光波数据中减去其特征缺少镜面峰值的标准表面的实际反射率特性。 这种漫反射标准反射特性以数学方程的形式存储在主计算机存储器中，曲线拟合到扩散标准的实际反射特性上。

公开(公告)号：US4311039A

公开(公告)日：1982-01-19

申请号：US093996

申请日：1979-11-14

申请人： Mark E. Koehler ,  Theodore Provder ,  Richard A. Zander

发明人： Mark E. Koehler ,  Theodore Provder ,  Richard A. Zander

IPC分类号： G01N15/04 ,  G01N15/02

CPC分类号： G01N15/042

摘要： An apparatus is provided which is characterized by a motor, a transmission, e.g., a continuously variable ratio friction transmission, and apparatus for interrupting power to the motor for a precise interval of time. A particular utilization of this device is for a photosedimentometer to enable more accurate determinations of particle size and size distribution.

摘要翻译： 提供了一种装置，其特征在于电动机，变速器，例如无级变速比摩擦传动装置，以及用于在精确的间隔时间内中断对电动机的动力的装置。 该设备的特别利用是使光度计能够更精确地确定粒度和尺寸分布。