Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
1997-11-12
2001-11-06
Lee, Cheukfan (Department: 2622)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S496000
Reexamination Certificate
active
06313927
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an image reading apparatus such as a film scanner which is arranged to project an image recorded on a developed (processed) film onto an image sensor to obtain an image signal.
2. Description of Related Art
A conventional film scanner adapted for both of developed films of two different forms, i.e., a developed film which is separated from a cartridge and has a long, strip-like shape (hereinafter referred to as a film strip) and a developed film which is left stowed in a cartridge and is movable into and out of the cartridge (hereinafter referred to as a cartridge film), has such a structure that an image recorded on the film strip is held approximately in the same position where an image recorded on the cartridge film is to be held, and either of the images of the films of the both forms can be read by a common image sensor, as disclosed in Japanese Laid-Open Patent Application No. HEI
5-145838.
In the above-mentioned conventional film scanner, however, it is impossible to adjust the inclination and position of the surface of the image sensor with respect to an image surface of the film. Therefore, in a case where the relative positions of the image surface and the surface of the image sensor are in an inadequate relation, an image read out from the film is apt to become blurred.
BRIEF SUMMARY OF THE INVENTION
It is an object of the invention to provide an image reading apparatus which is capable of handling image originals of a plurality of forms.
It is another object of the invention to provide an image reading apparatus which is capable of reading images in a state of having a high picture quality.
To attain the above objects, In accordance with an aspect of the invention, there is provided an image reading apparatus which comprises first original holding means for holding an original of a first form, second original holding means disposed in a position different from the position of the first original holding means for holding an original of a second form, an image sensor for picking up an image recorded on one of the original of the first form and the original of the second form, a common image forming lens for imaging on the image sensor the image recorded on one of the original of the first form and the original of the second form, and reflection means for changing over an optical path so as to cause the image recorded on one of the original of the first form and the original of the second form to be imaged on the image sensor by the common image forming lens.
With the above construction, it is possible to provide an image reading apparatus which is adapted for each of originals of a plurality of forms and is capable of reading an image with a high picture quality.
These and other objects and features of the invention will become apparent from the following detailed description of an embodiment thereof taken in connection with the accompanying drawings.
REFERENCES:
patent: 5335093 (1994-08-01), Imoto
patent: 5638189 (1997-06-01), Yanagisawa
patent: 5754314 (1998-05-01), Araki et al.
patent: 5767990 (1998-06-01), Ikeda
patent: 5907411 (1999-05-01), Han
Canon Kabushiki Kaisha
Lee Cheukfan
Robin Blecker & Daley
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