Surface analysis using gaussian beam profiles
CA 2288880 A1 · Owner: Holcomb, Matthew J. · Inventors: Holcomb, Matthew J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for measuring the physical characteristics of reflective or transparent surfaces may be used to detect particulates measure , surface roughness, and reconstruct surface images and detect defects in regular patterns on both smooth and rough surfaces. An apparatus based on this principle comprises a light source (12) for producing a beam of light (10) directed along an optical path; a spatial filter (34) positioned along the , optical path downstream from the light source for giving the beam of light a , Gaussian intensity profile (18); positioning means (22) for positioning the material (20) in the optical path downstream from the spatial filter (34); an inverse …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed May 6, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.