Biocular helmet-mounted display optical system with interpupillar distance adjustment
CA 2100520 A1 · Owner: Kaiser Aerospace & Electronics Corporation · Inventors: Bryars, Brett J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optical system for a biocular helmet-mounted display includes means for producing an image to be viewed by a user, a lens group that receives and collimate the image a, partially reflective, partially transmissive beam-splitter that projects the collimated image onto first and second image paths that each includes a focusing lens group to focus the image on a corresponding combiner eyepiece. The focusing lens group for each image path is constructed to have a focal length that matches the focal plane at which the corresponding combiner eyepiece is located, forming together an afocal lens combination that collimates light for the user. Thereby the, focal lengths for the image paths are …
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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 July 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2015.
- 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.