Scan camera principle

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

Vlad.

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

It is ready now!
Suggestions welcome
LP

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

I am refering to 1958 1959!
Regards
LP

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

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

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

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