(WO2010100571-A1)   NOVELTY - The measurement device (10) has an optical prism (2) or an optical diffraction grading, for splitting beam of white light (30) into a beam of multichromatic light (31) being directed onto the tested product (5) under a predetermined incident angle; and a camera (3) for recording a reflected beam of monochromatic light (32) of the tested product such that a z-axis surface height information of tested product can be extracted from a hue value of the reflected beam of monochromatic light while relatively moving the tested product in an x-axis scanning direction (9).    USE - Measurement device for optically measuring surface of a tested product, such as for measuring the dimensions of a product, especially for measuring and inspecting the position and height of reflow soldering paste on a printed circuit board (PCB) or solar cell product and/or for measuring the surface roughness of the product (claimed). Can also be used for testing electronic boards containing electronic components, such as integrated circuits, capacitors, transistors, and resistors; and for testing board surfaces or surfaces of solar cell products.    ADVANTAGE - Enables performing an inspection of the surface of a product, a component alignment inspection or an inspection of soldering paste arrangement prior to a reflow soldering process, and enables a creation of an optical three-dimensional (3D) model of the product surface. Scanning width of the product is enhanced since at least two or more cameras can be arranged in a y-axis direction perpendicular to the x scanning direction for parallel scanning. Shadowing and illumination effects are reduced since two or more cameras can be stereometrically arranged for 3D scanning of the product. Scanning of large products with high speed can be performed by arranging two or even more cameras in one scanning row perpendicular to a scanning direction to increase scanning width. Shadowing effects which can thus increase measurement accuracy are decreased using a stereometric arrangement of two or more cameras focusing on a certain line or on the product surface.