Minolta CM-512M3 BROCHURE

Multi-Angle Spectrophotometer

CM-512m3

Ideal for On-site Operation &
Curved Surface Measurement!

Multi-angle type
spectrophotometer

The color of metallic/pearl coatings
can be inspected easily.

The CM-512m3 measures colors by illuminating subjects from three
angles simultaneously (25º, 45º and 75º), making it suitable for subjects
such as metallic/pearl coatings used for automotive exteriors or for the
textured materials used for automotive interiors and allowing the
changes in color according to the illumination angle to be measured.

Unlike conventional spectrophotometers, correlation of the measurement
results with visual evaluation of such subjects can be achieved.

The ring-shaped illumination ensures stable
measurement without being affectedby the ori-
entation (rotational deviation) of the instrument.

Measurement is stable even for curved sur-
faces, such as automotive components.

Not only flat surfaces but also curved surfaces can be
measured stably with the large measurement area, the
two extension feet and the optional grip attached to the

instrument.

The graph display function enables easy
color judgment even on production sites
without using a personal computer.

Tolerance (allowable range) can be set for each target
data.

Original development

Evaluation equation suitable for measure-
ments of metallic/pearl coating correlates
well with visual evaluation.

With the conventional ∆E*ab equation, the values in the
highlight direction (25º) become larger and do not corre-
lated well with the results of visual evaluation. With the
CM-512m3, the ∆E

00 (CIEDE2000) equation is used with

parameters fine-tuned based on proprietary knowhow to
provide measurement data for metallic/pearl coatings
which correlate well with visual evaluation.

Extension feet

Measurement button

Grip

CM-A42

(optional)

Multi-angle method (Ring illumination from three angles / Light reception in one direction)
Illumination: 25º, 45º, 75º

Light reception: 0º

The measurement sample is illuminated from three angles and the reflection in one direction is received. Metallic/pearl colors may result
in great differences in color appearance depending on the observation angle. Like visual evaluation, the multi-angle method obtains
measured data by applying illumination from three different angles. Consequently, it is suitable for the evaluation of metallic/pearl colors.

PASS/FAIL displayColor difference display

∆L* ∆C* ∆H* ∆E00

Vertical
full-scale
value

± 0 line

25º 45º 75º

∆L*∆C*∆H*∆E00display example

Line graph display

Color difference tolerance
setting example: ∆E00=0.5