Scan camera principle

Topic

Topic author: Vlad

Posted on: 20090719144649

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

Vlad.

Reply author: Luiz Paracampo

Replied on: 20090719151727

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

Reply author: Luiz Paracampo

Replied on: 20090719161333

It is ready now!
Suggestions welcome
LP

Reply author: Detlev

Replied on: 20090719164907

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

Reply author: Luiz Paracampo

Replied on: 20090719180624

I am refering to 1958 1959!
Regards
LP

Reply author: mermoz37

Replied on: 20090721054532

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

Reply author: Detlev

Replied on: 20090721075047

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

Reply author: Luiz Paracampo

Replied on: 20090721192010

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

Reply author: Detlev

Replied on: 20090722041604

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

Scan camera principle

Topic

Replies