Avian Optics and
Spectroscopy Group

Capabilities Training Services Representation &
Distribution		 Services &
Support		 Meet the People

Murakami Color Research Laboratory
GCMS-3B Goniospectrophotometric Measurement System
GSP-1B Goniospectrophotometer

back to Murakami overview page

The GCMS-3B is the ideal instrument for measuring gonio-apparent materials. These are materials that change color appearance depending on the viewing and illumination angles. Examples are pearl-mica coating surfaces and interference pigments. For these types of materials, this gonio-spectrophotometric color measurement system can measure its color by measuring the spatial distribution of reflected (or transmitted) light at user-selectable angles of illumination and detection.

Based on the precise control on the incident and acceptance angle by the computer, the measurement of the spectral distribution of every pair of illumination/detection angles are performed individually. After calibration, and mounting of the samples, the settings for measurement conditions are made. Once the measurement begins, the operations of the instrument are completely automatic, and color system proceeds to capture spectral reflectance data at each angle pair selected.

The data achieved by this kind of measurement can be widely used as the basic data in the development of gonio-apparentmaterial matching. The data can also be applied as the input to computer graphics rendering models.

Movement of Light Source and Sample Table


Sample Table for Auto Flapping & Side Rotation>


Sample Table for Auto Flapping & Side Rotation

The GCSM-3B includes a pre-configured computer and all control and processing software for your instrument.

The system is also available without a computer; supply your own PC and order the GSP-1B for the device and software only. Note that the GSP-1B is controlled by GPIB; a GPIB control card will have to purchased separetly from a third party..


Schematic of the Measurement System

1. Light Source
2. Sample
3. Concave Diffraction Grating

Wide yellow arrow shows motion path of light source.

Arrows around sample holder show rotation, flop, and detection angles.
Double-beam Halogen Concave Diffraction Grating Silicon Photodiode Array
35 Elements 		Measurement Capability Fiber Measuring Size Interface

As with all Murakami instruments, integrated control and data processing software
is included with the purchase of the GCMS-3B or GSP-1B.
Capabilities Training Services Representation &
Distribution		 Services &
Support		 Meet the People

Avian Optics and Spectroscopy Group