Film scanner
A film scanner is used for picking up image signal from photographic image in order to simulate the photographic image as a video image on a monitor, or to make a hard copy of the photographic image through a video printer. A film scanner electrically scans and reads an image on a photographic film. A digital image signal is generated by the film scanner and is input to a peripheral apparatus, such as a computer, which displays the image on a display unit. Film scanners have been developed to digitize films for storage and processing in a digital form. Storing motion picture images in a digital form has many advantages over storing motion picture images using film. Typically a digital film scanner digitizes a film frame using a light source which exposes a film frame and projects an image. The projected image passes through a lens and onto a sensor. The sensor then converts the image into data for storage. Generally, the film scanner is provided with a CCD line sensor. By scanning the image in a direction in which the CCD image sensor extends, while the film is moved relative to the CCD image sensor in a direction perpendicular to the main scanning direction, a two-dimensional area is scanned. An imaging lens is disposed in between the film surface and the image sensor, so that the photographic image is focused on a photoelectric conversion surface of the image sensor.
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