Process for the production of optical elements
CA 1294470 C · Owner: Todokoro, Yasuyuki · Inventors: Suzuki, Toshihiro; Komenou, Kazunari; Todokoro, Yasuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of optical elements which comprises forming on a substrate a light-sensitive film containing at least a photoreactive compound and, selectively exposing the film to radiation to cause migration of the unreacted compound from an unexposed area to an exposed area by the exposure. The present process is particularly useful in the low-cost massproduction of various micronized optical elements such as plastic microlenses and arrays thereof optical, waveguides, diffraction gratings and holograms, for, example. An optical device comprising the optical elements of the present invention is also disclosed.
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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
- Granted January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
- 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.