Dual probe interferometer for object profile measuring
First Claim
1. An apparatus for measuring the profile of an object, which apparatus comprises a rotatable measuring table for the object, a measuring probe having one end which is adapted to be pressed against the object and a second end carrying a reflecting element, and an interferometer, whose measuring arm incorporates the reflecting element of the measuring probe, characterized by a reference table for a reference object, which reference table is rotatable in synchronism with and about the same axis as the measuring table, a reference probe, having one end which is adapted to be pressed against the reference object, and a second end carrying a reflecting element which is incorporated in the reference arm of the interferometer.
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Abstract
An apparatus is described for accurately measuring the profile on an object. The apparatus comprises two probes for simultaneously scanning the object to be measured and the reference object, the objects being rotatable about the same axis. Each of the probes is provided with a reflecting element, which are respectively incorporated in the measuring arm and reference arm of an interferometer.
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Citations
8 Claims
- 1. An apparatus for measuring the profile of an object, which apparatus comprises a rotatable measuring table for the object, a measuring probe having one end which is adapted to be pressed against the object and a second end carrying a reflecting element, and an interferometer, whose measuring arm incorporates the reflecting element of the measuring probe, characterized by a reference table for a reference object, which reference table is rotatable in synchronism with and about the same axis as the measuring table, a reference probe, having one end which is adapted to be pressed against the reference object, and a second end carrying a reflecting element which is incorporated in the reference arm of the interferometer.
Specification