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US 4,735,508 AGranted
Method and apparatus for measuring a curvature of a reflective surface
AssigneeHoneywell Inc.
InventorStephen L. Bellio
Life of this patent
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AssigneeHoneywell Inc.
InventorStephen L. Bellio
Estimating the term…
A method for measuring a curvature of a reflective surface includes the steps of directing a pair of collimated light beams onto a substantially smooth portion of the reflective surface and measuring the separation of the light beam images reflected from the surface as a representation of the curvature of the surface. An apparatus utilizing this method includes a pair of lasers for producing respective collimated light beams, a laser mount arranged to direct the separate light beams from the lasers as substantially parallel light beams onto a substantially smooth portion of a reflective surface being measured to produce respective bright spots on the surface, receiving images of the bright spots onto a diffuse target surface, viewing these bright spot images with a sensor to produce a light intensity pattern encompassing the spots and calculating the separation of the bright spot images from the light intensity pattern as a measure of the curvature of the surface.
A method for measuring a curvature of a reflective surface including the steps of directing a pair of spaced apart substantially collimated light beams onto a substantially smooth portion of the reflective surface to produce a pair of bright spots on the surface, receiving images of the bright spots onto a diffuse target surface, viewing these bright spot images with a sensor to produce a light intensity pattern encompassing the spots and calculating the separation of the bright spot images from the light intensity pattern as a measure of the curvature of the surface.
An apparatus for measuring a curvature of a reflective surface comprising
An apparatus for measuring the vacuum level in vacuum packed cans comprising
Dependencies are inferred from the claim text.