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  1. #201
    Our new friend needs to reach 10 posts to get to the next flight level
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    Re: Question about collimated display systems.

    Here's a link that shows what we got done this past Saturday:

    http://www.diy-cockpits.org/coll/col...lay_page2.html

    Hopefully the server won't fall over again today. (motherboard is fading I think)

    It turns out the only active patent we have to worry about covers the "ears" that help form the mirror. I don't know that there is a practical way around that one, but we'll look into it further at some point.
    WOW Gene , nice work and a great approach ..
    I liked the picture of the mirror in the previous link , it's so pure & really can be called a mirror ..
    Thank you so much Gene for your work ..

    Quote Originally Posted by geneb View Post
    Just a quick update - this is what the mirror "solid" looks like;


    This will be cut apart into the bits needed to make it into a framework. The top is 4" wide and the gap is about 68" wide. The mirror frame covers 225 degrees.

    g.
    I'm working now on a 180 degrees frame , But do you think by your experience that the 225 degrees frame can shape the Mylar easy ?? I think it ll lost its horizontal tension .. Plz correct me if I'm wrong ..

    another thing , If we minimized the frame from its down-sides , the Mylar would require a less vacuum power to get shape , because by this way we minimize the total space that the vacuum has to work in ..



    ( Sorry for editing your Picture ) ..

  2. #202
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    Re: Question about collimated display systems.

    This shows a wireframe of the mirror at it's correct 190 degree layout.


    g.

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  4. #203
    75+ Posting Member HansJansen's Avatar
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    Re: Question about collimated display systems.

    Quote Originally Posted by Ricardo Carvalho View Post
    I saw this yesterday on discovery, did not know that the projector had a mirror between it and the screen that reflects to the vacum mirror.

    http://science.discovery.com/videos/...simulator.html
    I tried to view the video, but after the commercial for a very expensive car which I'm not at all interested in, all I got to see was a message stating "this video is not available in your area"!

    (Booh!)
    Hans

  5. #204
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    Re: Question about collimated display systems.

    Quote Originally Posted by HansJansen View Post
    I tried to view the video, but after the commercial for a very expensive car which I'm not at all interested in, all I got to see was a message stating "this video is not available in your area"!

    (Booh!)
    I've got the same problem. Probably only North America. But I think I have seen the program that the video is probably from.

  6. #205
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    Re: Question about collimated display systems.

    Quote Originally Posted by HansJansen View Post
    I tried to view the video, but after the commercial for a very expensive car which I'm not at all interested in, all I got to see was a message stating "this video is not available in your area"!

    (Booh!)
    http://videos.howstuffworks.com/scie...ator-video.htm

    As it turns out, there are 2 versions of this video, one with a female voice, the one that is here, and one that i have just watched on tv with a british accented male voice that shows an animation of how the projection works just before the scene where the guy is working on the throttle.

    This version here does not have that scene... don't know why.
    Last edited by rjvcarvalho; 12-04-2010 at 07:45 PM. Reason: New information found.

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  8. #206
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    Re: Question about collimated display systems.


  9. #207
    Our new friend needs to reach 10 posts to get to the next flight level
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    Re: Question about collimated display systems.

    From where I can buy the "Mylar" ( Packaging paper or what ! ) ??? and what are the features that's recommended required ??

  10. #208
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    Re: Question about collimated display systems.

    Hi (sorry don't know your name),

    Search Google for Polyethylene terephtalate
    or try: http://en.wikipedia.org/wiki/Polyethylene_terephtalate

    It most found on the net in rolls of ~150 cm (or slightly more) width.
    Search in the agriculture sector, it's also used in greenhouses to reflect the light (hmm, not necessary in Egypt I presume...).

    As you did read before .., it's "coated" with aluminium for the mirror effect.
    In Europe about 10 euro per 100 cm (width above).

    But before searching too much ...:

    Wait for more results of Wayne and Gene.
    Without hopefully coming specific information / education (calculation method) it's not doable by trial and error.

    Hessel Oosten
    767 Level-D

  11. #209
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    Re: Question about collimated display systems.

    Quote Originally Posted by Ricardo Carvalho View Post
    http://videos.howstuffworks.com/scie...ator-video.htm

    As it turns out, there are 2 versions of this video, one with a female voice, the one that is here, and one that i have just watched on tv with a british accented male voice that shows an animation of how the projection works just before the scene where the guy is working on the throttle.

    This version here does not have that scene... don't know why.
    "How Stuff Works" (like lots of Discovery programmes) is made with different voiceovers for different regional markets. Quite often the US TV version is not the 'original' voiceover (which can often to be found in the Canadian broadcast instead) because quoted measurements generally need to be converted to Imperial (aka 'English') from metric for US consumption. The UK usually gets a version dubbed with a British speaker and metric units.

    So the version you saw was probably the UK version. The US version most likely had a few seconds edited out to fit the slightly shorter US half-hour slot (which has more commercials than you usually get on UK channels).

    NH

  12. #210
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    Re: Question about collimated display systems.

    BTW, if you happen to have access to a VPN service which has an US-based endpoint, you can get around the geo-ip restrictions and watch the video. Not that I would ever condone doing anything so evil and wrong, of course .

    NH

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