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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	Kaldewey, Timo, Schimun, Denoth
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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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Beschreibung
Zusammenfassung:	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.