Method of and apparatus for forming volume type phase hologram
CA 1324015 C · Owner: Tani, Motoaki · Inventors: Tani, Motoaki; Yamagishi, Yasuo; Ishitsuka, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and apparatus for forming a volume type phase hologram comprising the steps of after exposure, of a holographic material comprising a polymeric matrix having a radiation active substance associated therewith to an interference pattern of radiation dipping the, pattern-wise exposed holographic material in a swelling solution consisting of a first solvent which can act as a good solvent for the polymer of the matrix and a second solvent which can act as a poor solvent for the polymer and has a higher boiling point than that of the first solvent, and then pulling the swollen holographic material up from the swelling solution whereby, uniformly developed holograms having a large …
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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 November 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 9, 2010.
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Timeline
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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.