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US 4,963,018 AGranted
Ranging apparatus
AssigneeSira Limited
InventorRobert N. West
Life of this patent
Estimating the term…
Abstract
Apparatus for measuring the distance from the apparatus to a surface comprising means for passing a beam of light to the surface at an angle other than normal, means for receiving light reflected from the area of the surface illuminated by the beam and means for measuring the movement of the received beam whereby to measure the position of the surface area, means being provided to scan the surface.
Claims8
Apparatus for measuring the distance from the apparatus to a surface comprising;
- optical means for passing a beam of radiation to the surface at an angle other than normal;
- optical means positioned to receive said beam of radiation after it has been specularly reflected from the surface;
- means for measuring a position of the specularly reflected beam with respect to the optical axis of the second mentioned optical means whereby to indicate the distance from the part of the surface struck by the beam to the apparatus;
- and means for scanning said beam across the surface.
1 more element
Dependencies are inferred from the claim text.