Device for acquiring a three-dimensional shape by optoelectronic process
AssigneeCynovad Inc.
InventorYves Guern
Life of this patent
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Abstract
The invention concerns a device for acquiring the three-dimensional shape of an object (10) by opto-electronic process, comprising a chromatic system (18) for illuminating the object (10) and for picking up the light reflected or backscattered by the object (10), and a reflecting mirror (26) placed on the optical axis between the optical system (18) and an illumination slot (16) for deflecting the light reflected by the object towards a spectral analysis means (30).
Claims9
An apparatus for opto-electronically acquiring three dimensional shapes of an object, the apparatus comprising:
- a continuous spectrum light source (14);
- an illumination slot (16) on an optical axis in front of the source (14);
- an optical chromatic image forming system (18) for forming an image on the object (10) and sensing light reflected by the object (10);
- spectral analysis means (30) for the reflected light;
- and
- data processing means (32) coupled to the spectral analysis means (30);
- characterized in that it comprises a mirror (26) placed on the optical axis (12) between the illumination slot (16) and the optical system (18) to intercept the light rays output from the illumination slot (16) on the optical axis (12) in the direction of the object (10) and to also intercept light reflected from the object (10) and output from the optical system (18) and deviate it, for example perpendicularly to the optical axis (12), towards an analysis slot (28) placed on the optical axis of the spectral analysis means (30).
An apparatus as claimed in one of the preceding claims, characterized in that a magnifying optical system (22) is mounted on the optical axis (12) in between the optical chromatic system (18) and the object (10).
An apparatus as claimed in one of the preceding claims, characterized in that a mask (34) comprising a circular axial hole (38) for passing reflected light from the object (10) and two orifices (40) for passing light illuminating the object (10) is placed at a centre of the optical chromatic system (18).
An apparatus as claimed in one of the preceding claims, characterized in that the spectral analysis means (30) comprises a matrix of sensors of type CCD or analog having outputs connected to means for analog to digital conversion via a low-pass filter.
An apparatus as claimed in one of the preceding claims, characterized in that it comprises optical image rotation means (42) placed on the optical axis (12) in a zone traversed by the illumination light for the object and by the light reflected by the object.
Dependencies are inferred from the claim text.