Image forming device and method having plural image projecting paths

An image forming device comprising:

• a first scanner for scanning light, which exits from a first light source, onto a first original;
• a first optical system for imaging, at an exposure position, light which has one of been reflected at and been transmitted through said first original, thereby exposing an image of said first original onto a photosensitive material;
• a second scanner for scanning light, which exits from a second light source, onto a second original;
• a second optical system for imaging, at said exposure position, light which has been transmitted through said second original and a zoom lens, thereby enlarging and exposing an image of said second original onto a photosensitive material;
• a sensor, on which the light transmitted through said second original is incident, for reading densities of the image of said second original per pixel;
• and
• a controller, when the image of said second original is to be exposed onto the photosensitive material, for causing the light which exits from said second light source to be scanned one or more times onto said second original, and causing said sensor to read the image of said second original, and determining exposure conditions on the basis of the densities of the respective pixels of the image of said second original which densities were read by said sensor, and causing exposure of the image of said second original onto the photosensitive material in accordance with determined exposure conditions, using said second scanner and said second optical system.

An image forming method comprising a step of

• scanning, onto a first original of a predetermined size, light exiting from a first light source, and
• imaging, at an exposure position, light which is one of reflected at or transmitted through said first original, and
• exposing an image of said first original onto a photosensitive material,
• said method comprising the following steps which are executed before, after or simultaneously with the above-described step:
• scanning one or more times light, which exits from a second light source, onto a second original of a size which is smaller than the predetermined size of said first original, and reading densities of an image of said second original per pixel;
• determining exposure conditions on the basis of read densities of respective pixels of the image of said second original;
• and
• scanning light, and imaging at said exposure position light transmitted through said second original, and enlarging and exposing the image of said second original onto a photosensitive material on the basis of said exposure conditions,
• wherein all of said steps are executed by a single system.