公开(公告)号：US5015098A

公开(公告)日：1991-05-14

申请号：US534205

申请日：1990-06-07

Applicant: Bernard J. Berg ,  David R. Bowden ,  Mark A. Cargill ,  William R. Given

Inventor： Bernard J. Berg ,  David R. Bowden ,  Mark A. Cargill ,  William R. Given

IPC: G01N21/27

CPC classification number: G01N21/274 ,  G01N2201/126

Abstract: A densitometer apparatus (200) is disclosed and is adapted to provide color density measurements of opaque materials. The densitometer apparatus (200) comprises a light source unit (202) having a source light (204) projecting light through a collimating lens (206). Light rays transmitted through the collimating lens (206) project through an aperture (208). The rays are projected onto an irradiated area surface of an object sample (212) under test. Electromagnetic radiation in the form of reflected light rays (214) are reflected from the sample (212). The reflected light rays are directed through a spectral filter apparatus (216) and impinge on receptor surfaces of photo-voltaic sensor cells (232, 234, 236). The sensors (232, 234, 236) generate electrical currents having magnitudes proportional to the intensities of the sensed light rays. The electrical signals are applied as input signals to amplifiers (244, 246, 248), with the amplified signals applied as input signals to a multiplexer (256) for time multiplexing each of the output signals from the amplifiers. The resultant multiplexed signal is applied as an input signal to an A/D converter (264) to convert the analog multiplexed signal to a digital signal. The digital output signal from the A/D converter (264) is applied as a parallel set of binary information signals to a central processing unit (266). Actual measurements of color reference patches are processed so as to solve for unknown constants of a set of equations representing correction or compensation factors functionally dependent on actual reflectance measurements. The correction factors are then utilized by the densitometer apparatus (200) to compensate measurements of actual object samples.

Abstract translation: 公开了一种密度计装置（200），并且适于提供不透明材料的颜色密度测量。 密度计装置（200）包括具有通过准直透镜（206）投射光的源光（204）的光源单元（202）。 通过准直透镜（206）透射的光线突出通过孔（208）。 射线投射到被测样品（212）的被照射区域表面上。 反射光线（214）形式的电磁辐射从样品（212）反射。 反射光线被引导通过光谱滤光器装置（216）并撞击光电传感器单元（232,234,236）的受体表面。 传感器（232,234,236）产生具有与感测光线的强度成比例的大小的电流。 电信号作为输入信号施加到放大器（244,246,248），放大的信号作为输入信号施加到多路复用器（256），用于对来自放大器的每个输出信号进行时分复用。 将所得到的多路复用信号作为输入信号施加到A / D转换器（264），以将模拟多路复用信号转换为数字信号。 来自A / D转换器（264）的数字输出信号作为并行的二进制信息信号集合被应用于中央处理单元（266）。 处理颜色参考斑块的实际测量结果，以解决表示在功能上取决于实际反射率测量的校正或补偿因子的一组方程式的未知常数。 然后，密度计装置（200）利用校正因子来补偿实际物体样品的测量。