[chbot] molten media / fibre optics

Sat Dec 3 13:31:46 GMT 2022

If molten media gets into a bind I have a 40 foot high cube shipping
container out here in motukarara. It has a big opening cut out then patched
with ply so it's not secure (other than being out in the wops), but it's
there if you get desperate.

As to the fibre optic not having enough light to xmit or a surface to
project on... How does ulexite do that?

-a

On Sat, 3 Dec 2022, 22:13 , <chchrobotics-request at lists.ourshack.com> wrote:

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> Today's Topics:
>
>    1. Molten Media (rudy.kremers at 123gaming.com)
>    2. Re: Molten Media (Spencer Travers)
>    3. Fibre optic scraps? / synthetic ulexite? (andrew dean)
>    4. Re: Fibre optic scraps? / synthetic ulexite? (Mark Atherton)
>    5. Re: Fibre optic scraps? / synthetic ulexite? (Helmut Walle)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 2 Dec 2022 19:28:16 +0000
> From: "rudy.kremers at 123gaming.com" <rudy.kremers at racingworld.com>
> To: Christchurch Robotics <chchrobotics at lists.ourshack.com>
> Subject: [chbot] Molten Media
> Message-ID:
>         <
> AM6PR08MB331913659BB2877BF8082E4F86179 at AM6PR08MB3319.eurprd08.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello everyone.
>
> Molten Media Trust has decided to downsize its premises as we were paying
> too many $ to store junk.
> We were on track to move to a smaller building but the new landlord has
> pulled out and now it looks like we will be homeless for awhile while we
> try to look for alternative accommodation.
>
> If anyone knows of any buildings for lease or 'lease to buy' that would
> suit us or if you have some temporary storage, please let me know.
>
> We have to vacate the current building by the end of this month so if
> anyone is willing to lend a hand with our move, that would be awesome.
>
> Cheers,
> Rudy
> ph 0274798052
>
>
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> Message: 2
> Date: Sat, 3 Dec 2022 16:42:27 +1300
> From: Spencer Travers <spencer.travers at gmail.com>
> To: Christchurch Robotics <chchrobotics at lists.ourshack.com>
> Subject: Re: [chbot] Molten Media
> Message-ID:
>         <
> CAM1-1d0zpDOfDZ1UeCUf4sZgw7V6arQHNiKWu3Kyc730Tf4Tjg at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Rudy,
>
> Are you after people to help dismantle computers as was done before your
> previous move, or is it more about physically moving to the new premises,
> or both?
>
> Spencer
>
> On Sat, 3 Dec 2022 at 08:29, rudy.kremers at 123gaming.com <
> rudy.kremers at racingworld.com> wrote:
>
> > Hello everyone.
> >
> > Molten Media Trust has decided to downsize its premises as we were paying
> > too many $ to store junk.
> > We were on track to move to a smaller building but the new landlord has
> > pulled out and now it looks like we will be homeless for awhile while we
> > try to look for alternative accommodation.
> >
> > If anyone knows of any buildings for lease or 'lease to buy' that would
> > suit us or if you have some temporary storage, please let me know.
> >
> > We have to vacate the current building by the end of this month so if
> > anyone is willing to lend a hand with our move, that would be awesome.
> >
> > Cheers,
> > Rudy
> > ph 0274798052
> >
> >
> > _______________________________________________
> > Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> > https://lists.ourshack.com/mailman/listinfo/chchrobotics
> > Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> > Meetings usually 3rd Monday each month. See http://kiwibots.org for
> > venue, directions and dates.
> > When replying, please edit your Subject line to reflect new subjects.
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> ------------------------------
>
> Message: 3
> Date: Sat, 3 Dec 2022 18:29:54 +1300
> From: andrew dean <nzandydean at gmail.com>
> To: chchrobotics at lists.ourshack.com
> Subject: [chbot] Fibre optic scraps? / synthetic ulexite?
> Message-ID: <E2349763-9281-4FC7-AA26-D8A31798E123 at gmail.com>
> Content-Type: text/plain;       charset=utf-8
>
> I’ve been obsessed with ulexite for years and was curious if I could make
> a high quality synthetic by using epoxy resin to glue a bunch of fibre
> optic pieces together that I could cut/turn/mill into a solid that would
> (ideally) have the weird quality of making an image appear on the top of it.
>
> 1. You reckon it would work?
> 2. Would gluing fibre optic strands together ruin their optical isolation?
> 3. Know anybody with some scrap optical wire or a super cheap source for
> fibre optic scraps/b-grade stuff I could play with?
>
>
> Cheers!
> -Andrew
> (No, the other one)
> ...
> (Not that one either)
> ...
> (Ok, fine... <sigh> the fat American one… yeah, that one.)
>
>
> ------------------------------
>
> Message: 4
> Date: Sat, 3 Dec 2022 19:20:46 +1300
> From: Mark Atherton <markaren1 at xtra.co.nz>
> To: chchrobotics at lists.ourshack.com
> Subject: Re: [chbot] Fibre optic scraps? / synthetic ulexite?
> Message-ID: <5578cf9b-179d-d22b-816d-7d1c48cc86a3 at xtra.co.nz>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Sounds possible to me. The trick may be to keep the bundle coherent
> during gluing.
>
>
>
> On 12/3/2022 6:29 PM, andrew dean wrote:
> > I’ve been obsessed with ulexite for years and was curious if I could
> make a high quality synthetic by using epoxy resin to glue a bunch of fibre
> optic pieces together that I could cut/turn/mill into a solid that would
> (ideally) have the weird quality of making an image appear on the top of it.
> >
> > 1. You reckon it would work?
> > 2. Would gluing fibre optic strands together ruin their optical
> isolation?
> > 3. Know anybody with some scrap optical wire or a super cheap source for
> fibre optic scraps/b-grade stuff I could play with?
> >
> >
> > Cheers!
> > -Andrew
> > (No, the other one)
> > ...
> > (Not that one either)
> > ...
> > (Ok, fine... <sigh> the fat American one… yeah, that one.)
> > _______________________________________________
> > Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> > https://lists.ourshack.com/mailman/listinfo/chchrobotics
> > Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> > Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> > When replying, please edit your Subject line to reflect new subjects.
>
>
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 3 Dec 2022 22:13:10 +1300
> From: Helmut Walle <helmut.walle at gmail.com>
> To: chchrobotics at lists.ourshack.com
> Subject: Re: [chbot] Fibre optic scraps? / synthetic ulexite?
> Message-ID: <d13ef30f-2f40-6c3a-a19c-7cda2f850f41 at gmail.com>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> Sounds a bit like a fibre optic faceplate, which exists as a commercial
> product. But while
> possible in principle, this idea of embedding fibres in resin is unlikely
> to work well in
> practice, because:
>
> a) a visible image relies on the presence of light that the eye can see;
> but how will you
> illuminate the original image if you put the flat image-sized fibre bundle
> on the original?
> (Sure, if the original is translucent you can illuminate from the back...
> In theory you could
> also illuminate from the viewing side of the fibre bundle through the
> same, however in order to
> make that work you would need a polished transparent surface there, and
> that would then mean
> that the transferred image simply exits the same polished surface without
> becoming visible...)
>
> b) if you are thinking of using telecommunications optical fibre it won't
> work well if at all,
> because that kind of fibre consists of a core and cladding, where only the
> core transfers light,
> however the cladding takes up the larger part of the cross-section - so
> you won't be able to
> couple much light into the fibres. So you are probably looking at using
> something like these
> transparent plastic wires used in fibre optic decorative lamps. However,
> these are very probably
> made from just one plastic material, thus relying on the refractive index
> step from the plastic
> to the surrounding air. If you are embedding them in a resin then that
> resin needs to have a
> lower refractive index than the wire to make it work. Even so, it probably
> won't work well - see
> point a) above.
>
> c) even if you can couple a sufficient amount of light into the end of the
> fibre bundle sitting
> on the original, how are you going to make the image visible on the open
> end? The simplest
> approach might be to frost that end by sanding it finely. But that will be
> very inefficient as
> it will lead to a further loss of light, because much light will simply
> pass through into the
> open air and will thus be lost for imaging.
>
> I would think it may work somewhat, maybe to a degree where you can see
> something in a dark
> room, but it is highly unlikely that this will be useful as a daylight
> application with
> reasonable effort.
>
> All of that being said, fibre optic imaging bundles are commercially
> available, but they are
> generally being used together with optics that couple the original image
> into the fibre bundle
> efficiently at the object end, and further optics that efficiently couple
> the image out of the
> fibre bundle at the viewing end. These bundles are used for applications
> like endoscopes. And
> then there are the aforementioned fibre optic faceplates. More info on
> them here
>
> https://www.photonics.com/Category.aspx?CatID=24500
> https://incomusa.com/faceplate/
> https://www.explosionproofvideoscopes.com/fiber-optic-image-bundle/
> https://fibertech-optica.com/assemblies/fiber-optic-bundles/
> https://www.edmundoptics.com/f/fiber-optic-image-conduits/11464
>
> All of this stuff is pretty hard to make on your kitchen bench.
>
> And regarding question "2. Would gluing fibre optic strands together ruin
> their optical
> isolation?" - it depends... If you are doing this with telecommunications
> fibre (either monomode
> or multimode) it won't affect their performance, because they have a
> well-defined optical
> cladding layer around the light-conducting core. But if you are using a
> plastic "wire" made from
> one homogenous material then embedding in a resin may well destroy its
> light-conducting
> properties, particularly if the refractive index of the resin is the same
> or greater than that
> of the "wire".
>
> I would recommend getting the physics of the whole system sorted first
> before starting to
> experiment.
>
> Kind regards,
>
> Helmut.
>
>
> On 03/12/2022 19:20, Mark Atherton wrote:
> > Sounds possible to me. The trick may be to keep the bundle coherent
> during gluing.
> >
> >
> >
> > On 12/3/2022 6:29 PM, andrew dean wrote:
> >> I’ve been obsessed with ulexite for years and was curious if I could
> make a high quality
> >> synthetic by using epoxy resin to glue a bunch of fibre optic pieces
> together that I could
> >> cut/turn/mill into a solid that would (ideally) have the weird quality
> of making an image
> >> appear on the top of it.
> >>
> >> 1. You reckon it would work?
> >> 2. Would gluing fibre optic strands together ruin their optical
> isolation?
> >> 3. Know anybody with some scrap optical wire or a super cheap source
> for fibre optic
> >> scraps/b-grade stuff I could play with?
> >>
> >>
> >> Cheers!
> >> -Andrew
> >> (No, the other one)
> >> ...
> >> (Not that one either)
> >> ...
> >> (Ok, fine... <sigh> the fat American one… yeah, that one.)
> >> _______________________________________________
> >> Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> >> https://lists.ourshack.com/mailman/listinfo/chchrobotics
> >> Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> >> Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> >> When replying, please edit your Subject line to reflect new subjects.
> >
> >
> > _______________________________________________
> > Chchrobotics mailing list Chchrobotics at lists.ourshack.com
> > https://lists.ourshack.com/mailman/listinfo/chchrobotics
> > Mail Archives: http://lists.ourshack.com/pipermail/chchrobotics/
> > Meetings usually 3rd Monday each month. See http://kiwibots.org for
> venue, directions and dates.
> > When replying, please edit your Subject line to reflect new subjects.
>
>
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