Facsimile and static presentation processing – Facsimile – Picture signal generator
Reexamination Certificate
1998-05-22
2001-07-03
Lee, Cheukfan (Department: 2722)
Facsimile and static presentation processing
Facsimile
Picture signal generator
C358S474000, C358S471000
Reexamination Certificate
active
06256118
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
Cross reference is made to commonly assigned, copending U.S. applications Ser. No. 09/083,604, filed May 22, 1998, now U.S. Pat. No. 6,178,016, and entitled “IMAGING APPARATUS FOR A PHOTOGRAPHIC FILM AGE SCANNER” and Ser. No. 09/084,062, filed May 22, 1998 and entitled “ILLUMINANT HEAD ASSEMBLY FOR FILM IMAGE SCANNER”.
FIELD OF THE INVENTION
The invention relates generally to the assembly of precision aligned components. More specifically, the invention relates to mounting and fastening of a CCD sensor to an illumination housing in a photographic film scanner.
BACKGROUND OF THE INVENTION
CCD sensors are employed in photographic film scanners to convert film images optically projected onto the sensor sites into digital image signals. For optimum performance, it is critical that the CCD be mounted in precise alignment with the plane of the film being scanned. Typically this has been accomplished by means of carefully machined mounting devices employed precision datum surfaces the align the CCD to the film plane. Such techniques, while effective, are costly to implement and are therefore not suitable for low cost film scanners.
The use of a molded polycarbonate light-tight housing to precision mount the CCD at a remote location from the film plane provides a good approach to low cost design but introduces the problem of how to precision align the CCD at the end of the housing without using costly molding materials and techniques. The use of mechanical fasteners or adhesive bonding of the CCD to the flanges of the housing can result in misalignment of the CCD with remote film plane since these techniques rely on the positioning of the CCD to the housing flanges and do not allow for independent alignment of the CCD to the film plane. There is therefore a need for a low cost mounting arrangement in which a component, like a CCD, can be mounted on a housing in precise aligmnent with a remote location, such as the film plane of a photographic film scanner.
SUMMARY OF THE INVENTION
This need is satisfied by the present invention in which there is provided a fastened assembly of components comprising a first component having a hole therethrough; a second component spaced from said first component and at least one radiation cured adhesive fastener adhesively secured to a surface of said second component and extending through the hole in said first component and formed with a cap to hold said second component in a fixed spaced-apart relationship to said first component.
In a preferred embodiment of the invention, there is provided a sensor illumination housing assembly for a photographic film scanner which comprises an elongated illumination housing terminating at one end in a solid state image sensor housing segment having at least one hole therethrough; solid state image sensor means positioned in the sensor housing segment at a determined spaced-apart relationship to said sensor housing segment; and a radiation cured adhesive fastener extending through said hole, said fastener being adhesively secured at one end to said image sensor means and having a cap formed at the other end to mechanically secure the image sensor at said determined spaced-apart relationship to the sensor housing segment.
In another aspect of the invention there is provided a method of assembling a solid state imaging sensor to an illumination housing having a sensor housing segment at one end and a film plane aperture at the other end, wherein the method comprises providing said sensor in the sensor housing segment spaced from the inner surface of the housing segment; injecting a predetermined amount of viscous, radiation curable adhesive through a plurality of holes in the sensor housing segment to provide contact of the adhesive with a surface of the sensor and to form a cap over the hole at the other end of the adhesive; aligning said sensor in a determined position relative to said film plane aperture; and after aligning said sensor, curing the injected adhesive to form a solid fastener adhesively bonded to said sensor and mechanically to said sensor housing segment with said sensor in spaced-apart relationship to said sensor housing segment.
These and other aspects, objects, features and advantages of the present invention will be more clearly understood and appreciated from a review of the following detailed description of the preferred embodiments and appended claims, and by reference to the accompanying drawings.
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Boldt Dennis E.
Moriarty Charles J.
Boos, Jr. Francis H.
Eastman Kodak Company
Lee Cheukfan
Schindler, II Roland R.
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