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US 4,787,748 AGranted
Synchronous optical scanning apparatus
AssigneeCanadian Patents and Development Limited
InventorMarc Rioux
Life of this patent
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Abstract
A triangular, synchronous optical scanning apparatus to be used in a three-dimensional imaging is disclosed. A pair of curved stationary reflecting mirrors can be provided in optical beam paths to modify the reference plane to conform to the target surface.
Claims10
In an imaging device for determining the profile of a surface in a direction relative to a reference plane, a synchronous optical scanning apparatus, comprising:
- rotating scanning means including two or more rotating mirrors for synchronously scanning the surface along a scanning line by a scanning light beam and receiving a scanned beam scattered back from the surface;
- and
- a pair of reflecting mirrors, one in each of the optical paths of the scanning light beam and the scattered scanned beam;
- the invention being characterized in that
- the reflecting mirrors are curved.
2 more elements
Dependencies are inferred from the claim text.