Apparatus for projecting a time-variable optical pattern onto an object to be measured in three dimensions
AssigneeCognex Corporation
InventorsJens Petersen, Martin Schaffer, Bastian Harendt
Life of this patent
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Abstract
A device for projecting a time variable optical pattern onto an object that is to be measured in three dimensions, the device comprising a frame for an optical pattern; a light source with optional illumination optics; and imaging optics, wherein the optical pattern is on slide that is attached to a movement mechanism that moves the optical pattern relative to the optional illumination optics and/or relative to the imaging optics, wherein the movement mechanism causes a movement of the optical pattern in a slide plane that is oriented orthogonal to an optical axis of the imaging optics.
Claims18
A device for projecting a time variable movement of a fixed optical pattern onto an object that is to be measured in three dimensions, the device comprising:
- a frame for holding a slide having a fixed optical pattern;
- a movement mechanism attached to the frame;
- a light source including illumination optics;
- and
- imaging optics,
- wherein the movement mechanism moves the frame relative to the illumination optics or relative to the imaging optics, thereby causing a time variable movement of the fixed optical pattern on a circular path in a slide plane that is oriented orthogonal to an optical axis of the imaging optics.
A method for projecting a time variable movement of a fixed optical pattern onto an object that is to be measured in three dimensions, the method comprising:
- moving, using a device comprising a movement mechanism attached to a frame for holding a slide having a fixed optical pattern, the frame relative to a light source of the apparatus that includes illumination optics or relative to imaging optics of the apparatus, thereby causing a time variable movement of the fixed optical pattern on a circular path in a slide plane that is oriented orthogonal to an optical axis of the imaging optics.
Dependencies are inferred from the claim text.