Portable device for measuring the geometry of an object and its spatially varying surface reflectance on site

A device for measuring the geometry of a sample and the spatially varying surface reflectance of the sample surface, in which a basic dome-like three-dimensional structure is placed over the surface of the sample to be measured, wherein the basic dome-like three-dimensional structure has at least one concave wall concavely curved on the side facing the sample, the device further comprises at least two illumination units whose outputs direct light via respective apertures onto the sample surface to be measured, the apertures being rigidly or movably connected to the dome-like three-dimensional structure, and an optical acquisition system including at least two devices selected from the group consisting of cameras and optical detectors,

• wherein the sample is in a stationary position and the device further comprises a frame and a first motor for rotationally driving the basic dome-like three-dimensional structure, the motor being attached to the frame, wherein the basic dome-like three-dimensional structure is mechanically connected to a rotating part having an axis of rotation,
• wherein the rotating part is the shaft of the first motor oriented in such way that its axis of rotation passes through the concave wall of the basic dome-like three-dimensional structure or through an opening created in the concave wall or wherein the rotating part is an element connected to the shaft of the first motor by means of motion transmission means and the orientation of the shaft of the first motor and the motion transmission means are such that the axis of rotation of the rotating part passes through the concave wall of the basic dome-like three-dimensional structure or through an opening created in the concave wall, and
• wherein at least one first arm, which carries a set of at least two optical elements mediating the imaging onto the acquisition system,
• the optical elements consisting of mirrors and/or lenses and/or imaging bundles and/or prisms, is attached to the basic dome-like three-dimensional structure or to other parts mechanically fixed to the basic dome-like three-dimensional structure
• so that the first arm can rotate together with the basic dome-like three-dimensional structure, wherein this first arm is also mechanically connected to at least one second motor, the second motor being attached to the basic dome-like three-dimensional structure or to other parts mechanically fixed to the basic dome-like three-dimensional structure for independently driving the movement of the first arm with respect to a reference coordinate system associated with the basic dome-like three-dimensional structure.