GCMS-4
GCMS-4 Gonio-spectrophotometric
Color Measurement System
(includes computer and GPIB interface)
Instrument alone:
GSP-2 Gonio-spectrophotometer
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The GCMS-4 is the ideal measurement system for 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.
The basic operation and theory of the GCMS-4 is similar to the GCMS-3B.
Read that page for general capabilities of these goniospectrophotometric
systems. The GCMS-4 features increased angular resolution and control.
Like the GCMS-3B, the GCMS-4 can make measurements of a wide variety
of gonio-chromatic applications including:
- Pearl-mica and metallic paints
- Anodised and metallised coatings and inks
- Hair treatments – colorants and
conditioners
- Coated Glass
- Plastics
- Retro-reflective, coated and pearl-effect textiles
- Cosmetics
- Liquid-crystal displays
Specifications
To the best of our ability, these are correct at the time of publication.
Please contact AvianGroupUSA if you have questions on how to relate these specifications
to your measurement requirements.
| Measuring System | Dual-Beam
Optics with Reference Plate |
| Measuring Geometry | Adjustable illumination and viewing angles |
| Light Source | 12V 100W Halogen Lamp |
| Lamp Life | 1000 hrs Nominal |
| Dispersing element | Concave Diffraction Grating |
| Detector | Silicon Photodiode Array |
| Wavelength Range | 390 – 730 nm |
| Wavelength Interval | 10 nm |
| Spectral Bandpass | approx. 10 nm |
| Wavelength Accuracy | ± 1 nm @ 560nm |
| Wavelength Repeatability | ± 0.1 nm |
| Incident Angle Range |
9° to 180° |
| Angular Accuracy | within ± 0.5° |
| Angular Resolution | 0.1° (resolution of absolute encoder) |
| Viewed Area | approx. 8 x 16 mm at 0° receiving angle
approx. 8 x 106 mm at 81° receiving angle
(both with flapping angle = 0°) |
| Source Aperture Angle |
±2.1° in plane of measurement
±4.2° perpendicular to plane of measurement |
| Detector Aperture Angle |
±1.6° in plane of measurement
±1.4° perpendicular to plane of measurement |
| Measurement Duration | approx. 3 seconds per angle increment |
| Measurement Accuracy | within ± 0.5% |
| Repeatability |
0.06% SD ( white tile measured 45°/0° at 560nm) |
| Dimensions (mm) |
760 (W) x 1156 (D) x 965 (H) |
| Power Requirements |
220V AC ±10V, 4A |
| Computer Interface | GP-IB (PC) F by Contec Ltd |
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