Optoelectronic scanning apparatus

Claim 2

An optoelectronic scanning apparatus comprising: an illumination unit for illuminating an original document; and a reading unit horizontally spaced from the illumination unit and including a converging lens having a substantially horizontal optical axis, a photosensor array having a light receiving surface facing substantially downwardly and a reflector disposed below the array for reflecting a light image of the document from the lens upwardly onto the light receiving surface of the array; the reading unit comprising a reading unit housing having an upper surface formed with an elongated recess, a table slidable on said upper surface and being formed with a circular downwardly extending disc which snugly fits in the recess, the photosensor array being mounted on the table coaxially with the disc, the disc being rotatable about a center thereof and slidable in the recess for varying a transverse position of the table and thereby the array, and clamp means for clamping the table to the reading unit housing in a desired transverse position.

Claim 3

An apparatus as in claim 1, in which the reading unit further comprises an adjustable axial stop mounted on the reading unit housing and extending in parallel orientation to a variable extent into the recess and biasing means urging the disc into abutment with the axial stop.

Claim 4

An apparatus as in claim 2, further comprising a rectangular slider which snugly fits in the recess and is disposed between the disc and the stop.

Claim 5

An apparatus as in claim 2, further comprising first and second adjustable rotation stops mounted on the table spaced on opposite sides of the axial stop and extending parallel thereto a variable extent, the rotation stops being movable into engagement with an upstanding surface of the reading unit housing.

Claim 6

An optoelectronic scanning apparatus comprising: an illumination unit for illumination an original document; a reading unit horizontally spaced from the illumination unit and including a converging lens having a substantially horizontal optical axis, a photosensor array having a light receiving surface facing substantially downwardly and a reflector disposed below the array for reflecting a light image of the document from the lens upwardly onto the light receiving surface of the array; the array comprising a plurality of photosensor elements arranged in a row, the illumination unit comprising drive means for scanningly moving the document relative to the lens, the light image being of a linear portion of the document; a main housing, the illumination unit and reading unit being detachably mounted on the main housing; a box disposed between the illumination unit and the reading unit, the box being formed with apertures through which the light image passes; the illumination unit comprising a horizontal transparent platen for supporting the document and a reflector disposed below the platen for reflecting the light image horizontally through the box to the lens; a photosensor control unit mounted on the reading unit closely adjacent and electrically connected to the array and a signal processing unit mounted on the box and being electrically connected to the control unit; the control unit including strobe means for sequentially strobing the elements and amplifier means for amplifying output signals of the elements; the signal processing unit comprising quantization means; the reading unit comprising a reading unit housing having an upper surface formed with an elongated recess, a table slidable on said upper surface and being formed with a circular downwardly extending disc which snugly fits in the recess, the photosensor array being mounted on the table coaxially with the disc, the disc being rotatable about a center thereof and slidable in the recess for varying a transverse position of the table and thereby the array, and clamp means for clamping the table to the reading unit housing in a desired transverse position.

Claim 7

An optoelectronic scanning apparatus comprising: an illumination unit for illumination an original document; a reading unit horizontally spaced from the illumination unit and including a converging lens having a substantially horizontal optical axis, a photosensor array having a light receiving surface facing substantially downwardly and a reflector disposed below the array for reflecting a light image of the document from the lens upwardly onto the light receiving surface of the array; the array comprising a plurality of photosensor elements arranged in a row, the illumination unit comprising drive means for scanningly moving the document relative to the lens, the light image being of a linear portion of the document; a main housing, the illumination unit and reading unit being detachably mounted on the main housing; a box disposed between the illumination unit and the reading unit, the box being formed with apertures through which the light image passes; the illumination unit comprising a horizontal transparent platen for supporting the document and a reflector disposed below the platen for reflecting the light image horizontally through the box to the lens; a photosensor control unit mounted on the reading unit closely adjacent and electrically connected to the array and a signal processing unit mounted on the box and being electrically connected to the control unit; the control unit including strobe means for sequentially strobing the elements and amplifier means for amplifying output signals of the elements; the signal processing unit comprising quantization means; the reading unit comprising a reading unit housing having an upper surface formed with an elongated recess, a table slidable on said upper surface and being formed with a circular downwardly extending disc which snugly fits in the recess, the photosensor array being mounted on the table coaxially with the disc, the disc being rotatable about a center thereof and slidable in the recess for varying a transverse position of the table and thereby the array, and clamp means for clamping the table to the reading unit housing in a desired transverse position.