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Scan camera principle

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9 posts in this thread

07/19/2009 14:46

Excellent illustration! Thank you Luiz! Aside from the combination of prisms - such a simple device!

Vlad.

07/19/2009 15:17

i am trying to mae the explanation. await a bit
see entry of phohistory.ru.
LP

07/19/2009 16:13

It is ready now!
Suggestions welcome
LP

07/19/2009 16:49

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

07/19/2009 18:06

I am refering to 1958 1959!
Regards
LP

07/21/2009 05:45

does anyone can show us a picture from film ???
I am curious to see what kind of drawing was impressed on a rolling film ....

07/21/2009 07:50

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.

07/21/2009 19:20

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

07/22/2009 04:16

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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