Digital scanner

Details Digital scanner Digital scanner

1998-12-18

2001-09-18

Lee, Cheukfan (Department: 2722)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S484000, C358S487000

Reexamination Certificate

active

06292276

ABSTRACT:

FIELD OF THE INVENTION
The present invention is directed to a digital scanner, more particularly to a digital scanner which uses a low illumination source for illuminating a film having an image thereon for exposure onto a CCD array.
BACKGROUND OF THE INVENTION
Today's digital scanners are particularly designed to receive a single format media which is to be scanned. In order to accommodate various different sizes, there is typically provided a removable gate which allows the use of a second gate of a second format. However, use of replaceable gate assemblies presents problems, particularly with a low light system. In a low light illumination system it is critical that stray light not enter the field of exposure.
Thus, there is a need to provide a digital scanner capable of being easily switched between more than one format, yet be of a construction which will not allow stray light to interfere with the exposure of the CCD sensor used to capture the image.
SUMMARY OF THE INVENTION
In accordance with the present invention there is provided an apparatus for scanning a media, comprising:
a sensor for receiving an exposed image;
a low light illumination system for providing an exposure light comprising a low light source and an illumination cap member, the illumination member having an outer surface, a recess which extends below the outer surface, and an exit opening positioned in the recess through which the exposure light exits the illumination system, the illumination cap member having a projecting portion extending around at least a portion of the recess so as to provide a receiving channel; and
a gate assembly slidably mounted to the apparatus, the gate assembly having a frame member having an exposure aperture which is in optical alignment with the sensor and the exit opening such that the exposure light will pass through a media positioned at the exposure aperture on to the sensor, a clamp member moveably mounted to the frame member between an exposure position and a non-exposure position, and a light conduit mounted to the clamp member, the light conduit having a first opening at one end adjacent the exposure aperture and a second opening at the other end disposed adjacent the exit opening, the first opening having a configuration equal to or greater than the exposure aperture, the second end having an outwardly extending lip which extends around at least a portion of the second opening and having a configuration such that it mates within the channel.


REFERENCES:
patent: 4227804 (1980-10-01), Pramstraller
patent: 4893149 (1990-01-01), Satou et al.
patent: 5572286 (1996-11-01), Morita et al.
patent: 5617184 (1997-04-01), Kuwayama et al.

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