COLOR MEASUREMENT DEVICE HAVING A COMPACT OPTICAL SYSTEM

• Main Authors: Kaldewey, Timo, Ehbets, Peter
• Format: Patent
• Language: English; French; German
• Published: 05.07.2023
• Subjects: COLORIMETRY; MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT; MEASURING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; RADIATION PYROMETRY; TESTING

A color measurement device for determining color characteristics of a measurement area (300) is disclosed, comprising a light detector (200) and an optical system (100) for guiding light from the measurement area to the light detector. The optical system (100) defines a system axis (S) that passes through a detection area (210) of the light detector (200). The optical system comprises a first reflective surface (110) that causes incident light rays (Rin) that have entered the optical system parallel to the system axis (S) to be reflected into once-reflected light rays (R1) having a first direction of reflection towards the system axis (S). The optical system further comprises a second reflective surface (120) that causes the once-reflected light rays to be reflected into twice-reflected light rays (R2). The twice-reflected light rays are propagated to the light detector. Advantageously, the optical system comprises an optical body (101) made of a transparent material, wherein the reflective surfaces are formed by surface portions of the optical body, internal reflection taking place at these surface portions.