Вот здесь рассказывают почему не получится сканер совместить с увеличителем:
http://www.velocityreviews.com/forums/t250274-flat-bed-scanner-enlarger-film-scanner.html
Цытата:
You'll get severe vignetting with a standard scanner. The problem is
getting the light that leaves the enlarger lens to enter the scanner
lens anywhere other than near the centre of the image.
Draw the light path for an an enlarger. Light from the enlarging lens
reaches the paper at an angle to the vertical, except at the very centre
of the image. That's fine for enlarging, because the paper doesn't care
what angle the light reaches it from (within reason).
Now look at the light path for a scanner. Although the path is folded
several times by mirrors to keep the scan head relatively small, the
optical path is equivalent to having a lens something like 10 inches
below the glass surface, looking up at the glass through a narrow slit.
At the edges of the page, the light has to leave the paper at an angle
in order to enter the scanner lens. This isn't a problem when scanning,
since the light illuminates the paper and the paper scatters the light
in all directions.
If you put a scanner under an enlarger, you need some way to bend the
light from the enlarger lens, which is spreading out, back towards the
scanner lens. As someone else suggested, a Fresnel lens of just the
right focal length would work, but if the Fresnel lens is too close to
the focal plane you'll see the rings. A large plain lens would work
too, but the diameter needs to be larger than the area of the scanner
platen you are using, and it needs to be fairly strong.
There is one type of scanner that can be made to work. The Canon LiDE
scanners don't use a small CCD plus a lens to capture the image, they
use a large CMOS sensor that's the full width of the page, plus a long
array of tiny lenslets to project the paper image onto the sensor. If
you remove the lenslet array completely, you can project the enlarger
image *directly* onto the CMOS sensor. Since there's only one lens
involved (in the enlarger), you don't need to worry about redirecting
light from one lens into the other.
However, there's now another problem: the Canon sensor is B&W, and
colour sensing is done by using red, green, and blue LEDs in sequence to
illuminate the paper. If you're going to use an enlarger as the image
source, you need to disable the scanner light source, but rapidly switch
between red, green, and blue light in the enlarger in sync with the
colour that the scanner believes it has turned on. A conventional
enlarger won't do this; an enlarger head with R, G, and B strobe tubes
might be able to, or you could use a rapidly-rotating colour wheel
synced to the scan head. Or you could just make 3 greyscale scans with
a colour wheel selecting red, green, and blue filters one for each pass.
In short, an interesting experiment, but a lot of work for what you'd
get.
