METHOD AND DEVICE FOR INVESTIGATING THE VISUAL APPEARANCE OF A SAMPLE SURFACE

A method for investigating visual appearance of a sample surface using a handheld measuring device is disclosed. A combined image (140) of a measurement area on the sample surface is obtained using at least one integrated light source and at least one integrated camera of the handheld measuring devi...

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Bibliographic Details
Main Authors Kaldewey, Timo, Schimun, Denoth
Format Patent
LanguageEnglish
French
German
Published 25.09.2024
Subjects
COLORIMETRY
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT
MEASURING
PHYSICS
RADIATION PYROMETRY
TESTING
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Summary:A method for investigating visual appearance of a sample surface using a handheld measuring device is disclosed. A combined image (140) of a measurement area on the sample surface is obtained using at least one integrated light source and at least one integrated camera of the handheld measuring device and is displayed on a display device. The combined image is a combination of a first image (110) and a second image (120) under directional illumination. The first image (110) is acquired with a first measurement geometry, in which the observation direction is oriented at a first aspecular angle having an absolute value of at least 30°, and the second image (120) is acquired with a second measurement geometry, in which the observation direction is oriented at a second aspecular angle having an absolute value of not more than 15°. In this manner, the combined image provides a realistic color impression while ensuring that defects are well visible.
Bibliography:Application Number: EP20230164169