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Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 12:14 pm
da Airon
Hi all,
i always been an enthusiast about the scanner to take pictures of orders (the white balance is always correct, no tripod needed, always crisp clear images, the equipment is cheap... and so on) but i always had problems with screwbacks.
The main problem is that the depth of field for a good scanner doesn't get past the centimeter.
Since we have in the forum some good brains maybe someone can help me with an idea i had in mind.

I remember when i was young to have bought a mineral called Ulexite (aka television stone) that has some nice optical proprieties. It transfers the light from a surface to another. It works like an optic fiber.
Ulexite-Television-Stone-Kramer-Kern.jpg
ulexite.gif
In your opinion is there a matherial that works the same way and it is available in blocks?
This is what i have in mind to use it for:
prototype.jpg
The images shows a screwback order in red to be scanned. The long rectangle below is the scanning surface. The black arrows are the distance to the nearest flat surface, distance affect depth of field. The big arrow is propagated light, not affected by depth of field.

Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 12:45 pm
da filo
Non ci ho capito niente di come usare questa pietra [142 ma è trasparente?

Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 1:24 pm
da Airon
filo ha scritto:Non ci ho capito niente di come usare questa pietra [142 ma è trasparente?
Beh la pietra non è utilizzabile, è un minerale troppo grezzo.
Speravo però che ci fosse una cosa del genere ma sintetica...


Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 2:09 pm
da filo
Ho provato a cercarla, costa poco sui 5-10 $, ma si trova solo grezza o molto contaminata da intrusioni, come l'ambra.
U.JPG

Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 4:30 pm
da Airon
filo ha scritto:Ho provato a cercarla, costa poco sui 5-10 $, ma si trova solo grezza o molto contaminata da intrusioni, come l'ambra.
U.JPG
Nono, serve qualcosa che funzioni con lo stesso principio ma dia immagini cristalline...

Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 7:35 pm
da Lapa
Airon,

IMO, optical fibers tied in a bunch should give you basically the same result as the stone, but with a better quality image.

Marc

Re: Scanning Screwback Orders - an idea

Inviato: lun giu 02, 2014 8:06 pm
da Airon
Lapa ha scritto:Airon,

IMO, optical fibers tied in a bunch should give you basically the same result as the stone, but with a better quality image.

Marc
Yes this is the direction i'm looking for: optical fibers.
Yet i have to find a seller or producer that make blocks of them or something similar.