POV-Ray : Newsgroups : povray.off-topic : Optics Server Time
2 Nov 2024 03:15:20 EDT (-0400)
  Optics (Message 1 to 10 of 10)  
From: Patrick Elliott
Subject: Optics
Date: 11 Nov 2010 22:40:39
Message: <4cdcb737$1@news.povray.org>
Trying to decide, already, what to do about Halloween next year. 
Considering "improving" my Jedi costume and one thing I thought about 
adding is "electrobinoculars". Mind, short of wearing like.. contacts 
that are polorized for 3D, I see no practical way to do them the 
"original" way they where in SW:EP1 (hint - you looked in the end with 
one opening, the one with two openings was pointed *at* the thing you 
wanted to look at. The rest of the movies they end up using them like 
the "front" is the one with a single opening...) Basically, this would 
imply that Luke's used a holographic display on "his" side, and 
generated that from the two images taken in from the front, with 
magnification.

Ok, so.. As I said, that design is pretty much out... lol Can probably 
fake it by placing an eye separator in between images.. Close enough I 
guess. lol

Now, the trick is, if I can figure out how, I plan to find two LCDs, of 
some sort, of the same type/size, and have them for left and right eyes. 
Then, use CCDs to "capture" the images (way easier to find too), and 
tweak them, including adding lettering, etc., via a microcontroller, to 
the image, before display. *But*, for this to work as a believable 
design, I need to be able to "magnify" the image, and not using some 
crappy pixel magnification (or at least not mostly, though mixing the 
two could be.. complicated).

Finally, to my question - Anyone know any sites/sources, where I could 
work out how to build the necessary mini-telescoping type optics 
"inside", which would be needed to do true magnification? Shouldn't be 
too hard to put together a step motor rig to move lenses on both sides, 
to match, but, its figuring what lenses I would need to make it work at 
all that I don't have a damn clue about.

Course, it might turn out to be a project that sits in the corner for 
years, instead of being finished immediately. lol But, it would be damn 
cool to build something that works.

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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From: Francois Labreque
Subject: Re: Optics
Date: 12 Nov 2010 07:07:18
Message: <4cdd2df6$1@news.povray.org>

> Finally, to my question - Anyone know any sites/sources, where I could
> work out how to build the necessary mini-telescoping type optics
> "inside", which would be needed to do true magnification? Shouldn't be
> too hard to put together a step motor rig to move lenses on both sides,
> to match, but, its figuring what lenses I would need to make it work at
> all that I don't have a damn clue about.

You could buy cheap binoculars (e.g. kids toy), or old ones from a flea 
market and reuse the optics.

-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   gmail.com     */}camera{orthographic location<6,1.25,-6>look_at a }


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From: scott
Subject: Re: Optics
Date: 12 Nov 2010 08:31:21
Message: <4cdd41a9$1@news.povray.org>
> Now, the trick is, if I can figure out how, I plan to find two LCDs, of 
> some sort, of the same type/size, and have them for left and right eyes.

I'd get two of those webcam telescopes, plug them into a small laptop you're 
carrying on your back, and output the combined image to a small LCD monitor 
covering both eyes.  You won't be able to place the LCD too close to your 
eyes (think 15 cm or less) otherwise you'll get a headache very quickly. 
Something like a 7 or 8" widescreen LCD should work.  Not sure how you plan 
to house everything, it might end up looking a bit bulky unless you can do 
something clever with mirrors.


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From: Patrick Elliott
Subject: Re: Optics
Date: 12 Nov 2010 11:17:55
Message: <4cdd68b3$1@news.povray.org>
On 11/12/2010 5:07 AM, Francois Labreque wrote:

>> Finally, to my question - Anyone know any sites/sources, where I could
>> work out how to build the necessary mini-telescoping type optics
>> "inside", which would be needed to do true magnification? Shouldn't be
>> too hard to put together a step motor rig to move lenses on both sides,
>> to match, but, its figuring what lenses I would need to make it work at
>> all that I don't have a damn clue about.
>
> You could buy cheap binoculars (e.g. kids toy), or old ones from a flea
> market and reuse the optics.
>
Hmm. True, to a point. Kind of depends. I would like a fair range of 
magnification, and a lot of them have fairly limited potential. But, 
yeah, that is a possibility.

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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From: Patrick Elliott
Subject: Re: Optics
Date: 12 Nov 2010 11:25:14
Message: <4cdd6a6a$1@news.povray.org>
On 11/12/2010 6:31 AM, scott wrote:
>> Now, the trick is, if I can figure out how, I plan to find two LCDs,
>> of some sort, of the same type/size, and have them for left and right
>> eyes.
>
> I'd get two of those webcam telescopes, plug them into a small laptop
> you're carrying on your back, and output the combined image to a small
> LCD monitor covering both eyes. You won't be able to place the LCD too
> close to your eyes (think 15 cm or less) otherwise you'll get a headache
> very quickly. Something like a 7 or 8" widescreen LCD should work. Not
> sure how you plan to house everything, it might end up looking a bit
> bulky unless you can do something clever with mirrors.
>

Well, making a "small" slim design is likely to be problematic, however 
the ones from episode IV where rather bulky to start with. Something 
between the two would probably be doable. Had considered using a wide 
screen LCD too, but not sure of the odds of finding one on the cheap 
(where is working ones from otherwise dead devices, including maybe even 
old cell phones, in a smaller size, is likely easier). The laptop would 
certainly be easier from the standpoint of coding, but it should be 
possible to stick an Arduino or the like into a semi-bulky case, and 
program it to do what is needed. Telescopes are and interesting idea.. 
One of the things I wasn't too sure of with using a check binocular was 
"range" of magnification. A telescope might have more.

As for distance to eyes on the screens, if the design was made "close" 
to the one in the movie, but maybe a bit less bulky, then "view" end 
would have a few inches between eyes and screens anyway.

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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From: Patrick Elliott
Subject: Re: Optics
Date: 12 Nov 2010 23:34:48
Message: <4cde1568$1@news.povray.org>
Seems the biggest issue with this is finding the right controller, with 
enough memory/ability to expand it, and *then* figuring out how to 
attach the bloody parts to it. lol Going to need to do some thinking on 
this...

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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From: Nekar Xenos
Subject: Re: Optics
Date: 13 Nov 2010 02:25:08
Message: <op.vl3lj0boufxv4h@go-dynamite>
On Sat, 13 Nov 2010 06:34:47 +0200, Patrick Elliott <sel### [at] npgcablecom>  
wrote:

> Seems the biggest issue with this is finding the right controller, with  
> enough memory/ability to expand it, and *then* figuring out how to  
> attach the bloody parts to it. lol Going to need to do some thinking on  
> this...
>
i-phone?
B)

-nekar Xenos-


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From: Warp
Subject: Re: Optics
Date: 13 Nov 2010 08:53:50
Message: <4cde986e@news.povray.org>
Patrick Elliott <sel### [at] npgcablecom> wrote:
> Trying to decide, already, what to do about Halloween next year. 
> Considering "improving" my Jedi costume and one thing I thought about 
> adding is "electrobinoculars".

  Try this:

http://www.youtube.com/watch?v=yjP2ginWZLg

  (Although one could ask what does it mean when a boy wants to dress up
like a woman...)

-- 
                                                          - Warp


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From: Patrick Elliott
Subject: Re: Optics
Date: 14 Nov 2010 17:27:24
Message: <4ce0624c$1@news.povray.org>
On 11/13/2010 12:25 AM, Nekar Xenos wrote:
> On Sat, 13 Nov 2010 06:34:47 +0200, Patrick Elliott
> <sel### [at] npgcablecom> wrote:
>
>> Seems the biggest issue with this is finding the right controller,
>> with enough memory/ability to expand it, and *then* figuring out how
>> to attach the bloody parts to it. lol Going to need to do some
>> thinking on this...
>>
> i-phone?
> B)
>
> -nekar Xenos-
Uh, don't think so.. lol For one, it only processes one image source, 
and two, it probably costs about 50 times what off the shelf parts 
would. ;) lol

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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From: Patrick Elliott
Subject: Re: Optics
Date: 15 Nov 2010 02:37:38
Message: <4ce0e342$1@news.povray.org>
On 11/14/2010 3:27 PM, Patrick Elliott wrote:
> On 11/13/2010 12:25 AM, Nekar Xenos wrote:
>> On Sat, 13 Nov 2010 06:34:47 +0200, Patrick Elliott
>> <sel### [at] npgcablecom> wrote:
>>
>>> Seems the biggest issue with this is finding the right controller,
>>> with enough memory/ability to expand it, and *then* figuring out how
>>> to attach the bloody parts to it. lol Going to need to do some
>>> thinking on this...
>>>
>> i-phone?
>> B)
>>
>> -nekar Xenos-
> Uh, don't think so.. lol For one, it only processes one image source,
> and two, it probably costs about 50 times what off the shelf parts
> would. ;) lol
>
Had to head to work, so.. now going to be more specific. As I understand 
the issue, the CCD is tied to a "driver". This basically works like the 
reverse of what the LCD would do, where you poll the device for the 
data. I am not sure how complex the polling is, but with the LCD at 
least you have basically a memory that tracks the "state" of the pixels, 
and a bus, which you pump data into, based on a set of coordinates for 
the data in the memory. At least, I assume this is more or less the way 
pixel ones work, since the one I read up on was a text display (so, 
obviously a bit different). Either that, or you ping the driver and it 
dumps the whole block of image data to your controller's input bus. This 
means you are either driving directly from a bus, or you *might* if it 
is something like a web cam, driving a USB from the bus, which then 
talks to the camera's driver. Either way, before you can alter the 
image, or even just move it over to the output display, you need to 
store the total pixels "in memory", for the microcontroller, before 
passing this to your LCD driver, what ever it then does with it. For a 
"cheapish" camera, that is 1MB+- per frame, you are pulling in two 
frames, one for each camera, changing the result, with fonts or the 
like, to add hatch marks, range, etc., like a real one would show on its 
display, then feeding that out to the LCD. Figure.. At least 2MB, not 
including "software" to run the program that pulls the image, blits data 
to it, then passes it on to the next stage. Oh, and some additional code 
(maybe), to handle when to do the "software" zoom, control the motors to 
move the physical system, and what ever else you may need to do. 
Figure.. for good measure you might want at least 4MB, minimum. Most of 
them support up to 512*k*, and its not clear how/if they even allow you 
to tack on more memory.

And, as I said, existing designs do not support more than one camera 
input, like your existing cameras, cells phones, etc. Though.. I suppose 
if you wanted to spend idiot amounts of cash, you could buy one of the 
new 3D cameras... :p

Almost be easier to take a newer, faster, lower power, 65C816 chip, and 
"build" something with enough memory. At least I would understand the 
damn machine code in one of the things. lol

-- 
void main () {

     if version = "Vista" {
       call slow_by_half();
       call DRM_everything();
     }
     call functional_code();
   }
   else
     call crash_windows();
}

<A HREF='http://www.daz3d.com/index.php?refid=16130551'>Get 3D Models, 
3D Content, and 3D Software at DAZ3D!</A>


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