Film scanner
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorYuichi Kurosawa
Life of this patent
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Abstract
A film scanner has a transport table for transporting the film held by a film holder in a sub-scan direction, a transport mechanism for moving the transport table in the sub-scan direction, a line sensor and a line sensor drive circuit for obtaining an image of the film. The transport mechanism is provided with a scan motor driven in predetermined steps. The line sensor and the line sensor drive circuit are configured to read the signal at a first timing corresponding to a rotational position of the step of the scan motor and read the signal at both of the first timing and a second timing where the motor temporarily stops, due to overshoot, at an angular position between first timings.
Claims9
A film scanner for reading an image formed on a film, said film scanner comprising:
- an imaging device that senses a part of said image to generate an image signal;
- a transport table that supports said film;
- a stepper motor that moves said transport table in a predetermined direction, so that said imaging device can sense the whole of said image, said stepper motor being driven in steps;
- and
- an image signal reading processor that reads said image signal in synchronization with movement of said transport table, said image signal reading processor reading at one or both of a first timing where said stepper motor stops at a rotational angle position of a step and a second timing where said stepper motor temporarily stops at least at one rotational angle position during a step.
A film scanner provided with an imaging device for performing a main-scan of a film on which an image is formed to scan said image and a scanning mechanism for moving the film in a sub-scan direction perpendicular to said main-scan direction with respect to said imaging device, characterized in that said scanning mechanism is provided with a transport table for supporting said film and transporting it in said sub-scan direction, a transport mechanism for making said transport table move in said sub-scan direction, and an image signal reading processor for reading an image signal of said film obtained by said imaging device in synchronization with movement of said transport table, said transport mechanism is provided with a stepper motor serving as a source of drive power and driven in required steps, and said image signal reading processor is configured to read said image signal at one or both of a first timing where said stepper motor stops at a rotational angle position of a step and a second timing where it temporarily stops at least at one rotational angle position during a step.
Dependencies are inferred from the claim text.