Surface inspection apparatus
CA 1283964 C · Owner: Hajime Industries Ltd. · Inventors: Yoshida, Hajime
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A surface inspection apparatuses having a light source for irradiating an uneven surface of an object to be inspected, a photoelectric conversion sensor for picking up the uneven surface of the object and generating a video signal thereof, and an electronic processor for processing the video signal to inspect the surface of the object in, which an optical mask is located in front of the light source so as to restrict the passage of the light from the light source with a predetermined pattern whereby the, irregular light refection of the light from the light source, which passed through the optical mask on the uneven, surface becomes substantially uniform.
Read the whole patent
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
- Granted May 7, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 2008.
- 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
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.