| 摘要 |
The invention concerns improvements to optical measurement systems by confocal imaging using an objective whereof the axial chromatism is adapted to the desired measurement range. The technical field of the invention is that of the production of dimensional measuring appliances without contact with the measured object. The invention is characterised in that it consists in: emitting a polychromatic light pulse (12), in transporting the pulse up to the input of a measuring probe (4) comprising a chromatic objective (4a), placing a spot (28) on the object in the measuring field (17, 18) of the objective, on the optical axis (5) thereof, transporting the echo (19, 20, 21) produced by the spot (28) of the object up to a photoelectric detector (6), causing a temporal dispersion of the chromatic components of the emitted pulse and/or of the echo, and determining the result of the measurement by computation based on said temporal dispersion.
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