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Re: Parts tips for making an EyeTap-like display

Hi,
If you can stuff a camera(probabally a spy-cam or a mini camera) into the M1 
Display casing, this will eliminate the need for having a mirror assembly, 
and, easy to make.

Vinay
Bangalore
INDIA

>From: Don Papp <>
>Reply-To: 
>To: 
>Subject: Parts tips for making an EyeTap-like display
>Date: Thu, 5 Dec 2002 15:37:48 -0700 (MST)
>
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>Hey everyone, I need some tips on parts that will give me the least amount
>of hassle in making a display that fulfills the EyeTap requirements.
>
>The display is for testing only and obtrusiveness, etc is not a concern.
>(ie I can look as borg as I want so long as it works and keeps costs
>down..)
>
>The idea (bit of a recap of EyeTap here) is a display will be reflected
>into my eye off a 2-sided mirror at an approximate 45 degree angle.
>
>A camera will be capturing video, bounced off the back of this same 45
>degree mirror.
>
>The result is that the display image presented to the eye is the video
>direct from the NTSC camera, which is - by virtue of the mirror -
>effectively located "inside the eye".
>
>In other words the camera sees the same view as if it were physically
>where my eyeball is.  Thankfully, it is not - it's actually off to the
>side, thanks to the 45 degree mirror.
>
>The image from the display presented to my eye is the video direct from
>the camera.
>
>Ideally, the field of view of the camera and display should match, so that
>the video image I see from the display/camera combo is the same virtual
>size as the mirror I'm looking into.
>
>Clear?  So the mirror works like a "window".
>
>
>I'd be grateful for any tips on part selection that will allow me to
>select a suitable FOV lens, camera, and display to help me do this.
>
>Also, any suggestions on how to make some corrections if the FOV, etc
>don't quite match up?
>
>
>Finally, (and this is a tricky part) does anyone know of a filter or
>camera that is sensitive to IR in the ~780nM wavelength?  (Or the best way
>to get what I want, which I will describe..)
>
>The idea is that I want to use an IR laser (this one below):
>http://www.digikey.com/scripts/us/dksus.dll?Criteria?Ref=66121&Cat=31261478
>as a laser pointer that only the camera can see.  And of course, I can see
>it as well when I look through the EyeTap which is the video from the
>camera that is able to "see" the IR laser pointer dot.
>
>So by virtue of the EyeTap setup, I can see where the laser is pointed (in
>the real, physical world) by seeing it through the EyeTap video feed -
>since if it's truly an EyeTap the video presentation and real world
>location of the video view that I see are one and the same.
>
>
>Right now I want to get that working so I can have a reliable EyeTap, and
>the "invisible" laser pointer working with it.  Once that's done, I can
>get to processing the video with a wearable or whatever.
>
>I'd prefer to make this a do-it-yourself setup; budget of a few hundred,
>or possible trades.
>
>Thanks!
>
>Don Papp
>http://AEinnovations.com
>
>GNUPG/PGP Key: http://AEinnovations.com/downloads/pubkey.html
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>
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