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Scan camera principle

Created by Luiz Paracampo on 7/19/2009 2:07:55 PM
Last Edited by Detlev on 5/15/2011 2:35:14 PM  
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Vladislav Kern
Vlad

USA
4196 Posts
My Collection

Posted - Jul 19 2009 :  2:46:49 PM  Show Profile  Visit Vlad's Homepage  Reply with Quote
Excellent illustration! Thank you Luiz! Aside from the combination of prisms - such a simple device!

Vlad.
Luiz Paracampo
Luiz Paracampo
Brazil
1868 Posts
My Collection

Posted - Jul 19 2009 :  3:17:27 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
i am trying to mae the explanation. await a bit
see entry of phohistory.ru.
LP
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Luiz Paracampo
Luiz Paracampo
Brazil
1868 Posts
My Collection

Posted - Jul 19 2009 :  4:13:33 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
It is ready now!
Suggestions welcome
LP
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Detlev Vreisleben
Detlev
Germany
79 Posts
Posted - Jul 19 2009 :  4:49:07 PM  Show Profile  Reply with Quote
Hello Luiz,
The rollover technique was not unknown to the west. Keith Melton shows in his book "Spycraft" an OTS (CIA) rollover camera from 1968.
Detlev
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Luiz Paracampo
Luiz Paracampo
Brazil
1868 Posts
My Collection

Posted - Jul 19 2009 :  6:06:24 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
I am refering to 1958 1959!
Regards
LP
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BERRY alain
mermoz37
France
814 Posts
Posted - Jul 21 2009 :  05:45:32 AM  Show Profile  Reply with Quote
does anyone can show us a picture from film ???
I am curious to see what kind of drawing was impressed on a rolling film ....
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Detlev Vreisleben
Detlev
Germany
79 Posts
Posted - Jul 21 2009 :  07:50:47 AM  Show Profile  Reply with Quote
There is a similar working czechoslovacian scanner, Jan III. He scans a whole DIN A4 page at once while moving the film. You get an ordinary negative.



http://www.ussrphoto.com/UserContent/2172009_JanIII-1.jpg



http://www.ussrphoto.com/UserContent/2172009_JanIII-2.jpg




http://www.ussrphoto.com/UserContent/2172009_Jan-Testbild.jpg


Edited by - Detlev on Jul 21 2009 07:51:25 AM
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Luiz Paracampo
Luiz Paracampo
Brazil
1868 Posts
My Collection

Posted - Jul 21 2009 :  7:20:10 PM  Show Profile  Visit Luiz Paracampo's Homepage  Reply with Quote
Detlev:
This Jan III is a real scan camera but it works in a totally different principle.
Prints a readable but with uneven illumnation.
LP

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Detlev Vreisleben
Detlev
Germany
79 Posts
Posted - Jul 22 2009 :  04:16:04 AM  Show Profile  Reply with Quote
Hello Luiz,
the optical path is different, but it is the same principle: the film is moving while the document is scanned. When using a rollover camera you scan manually, Jan III does it automatically.
Regards,
Detlev
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