Abstract:
A light projecting device includes a base board, a light guiding member, a holding member, a cover, and a positioning member. A plurality of light-emitting elements are arranged in a line on the base board in a main scan direction. The light guiding member faces a radiation surface of the light-emitting elements and guides light projected from the light-emitting elements to an irradiation region of an illuminated object. The holding member holds the base board. The cover covers the base board and the light guiding member. The positioning member positions the light guiding member on the holding member. The holding member and the cover sandwich the light guiding member positioned by the positioning member. The light projecting device includes the holding member, the light guiding member, the base board, and the cover as a single unit which is detachably mountable relative to a chassis of the light projecting device.
Abstract:
An original reading unit has first and second arrays of sensor assemblies extending in a main scanning direction for performing readings of an original document. Each of the sensor assemblies includes a sensor holder that undergoes pivotal movement about a single rotation center as a fulcrum along a wall of a unit base to bring the sensor holder to a predetermined position whereat the sensor holder can be fixed to the units base wall. A line sensor is mounted relative to the sensor holder so as not to be shifted in the main scanning direction or in a sub-scanning direction, and to undergo movement in an approaching or a separating direction so as to be brought into contact with or separated from, respectively, the unit base wall and an original support plate attached to the unit base. A focus setup unit moves the line sensor in the approaching or separating direction and positions the line sensor at a location whereat focus can be adjusted.
Abstract:
In an optical beam scanning apparatus and an image forming apparatus equipped with the optical beam scanning apparatus of the present invention, a holder base is screwed to an optical housing, a holder holds a light source, and a laser drive board is screwed to the holder. Rotary adjustment of the holder about the optical axis of the light source is performed with respect to the holder base, and the holder is fixed to the holder base. According to the optical beam scanning apparatus and the image forming apparatus equipped with the optical beam scanning apparatus of the present invention, it is possible to perform rotary adjustment of the light source about the optical axis with ease even in a small space.
Abstract:
Provided are a scanning module and an image reading apparatus having the same. An alignment unit that can align positions of an image sensor and its tilt angles with regard to five degrees of freedom when a coupling position of an alignment member to a frame and a coupling position of a base plate to the alignment member are controlled, is provided, the image sensor can be aligned regardless of whether or not the production of the scanning module is completed, an alignment process is facilitated, and a manufacturing cost is reduce.
Abstract:
A scanning head is provided suitable for scanning large-size documents including a plurality of contact type CCDs staggered on a common substrate with overlapping end portions, so that their sensitivity ranges are adjoined to one another, adjacent ends of two CCDs being fixed on the substrate by stops, and the opposite ends of these CCDs being elastically supported to allow for thermal expansion or contraction, there being interposed between the first CCD and the third CCD, a spacer which has a thermal expansion coefficient comparable to that of the CCDs, so that the sensitivity ranges of the second and third CCDs are matched to one another, irrespective of the expansion or contraction of the second CCD.
Abstract:
An apparatus and method for adjusting the location of the image sensor in an image reading device is disclosed. The image sensor may be adjusted around or along any of three mutually perpendicular axes which intersect the optical lens system of the image reading device.
Abstract:
To provide a scanning head (10) suitable for scanning large-size documents, a plurality of contact type CCDs (12, 14, 16) are staggered on a common substrate (18) with overlapping end portions, so that their sensitive ranges (22, 24, 26) are adjoined to one another. The adjacent ends of two CCDs (12, 14) are fixed on the substrate by stops (28, 34), and the opposite ends of these CCDs are elastically supported to allow for thermal expansion or contraction. Between the first CCD (12) and the third CCD (16), a spacer (40) is interposed which has a thermal expansion coefficient comparable to that of the CCDs, so that the sensitive ranges (24, 26) of the second and third CCDs (14, 16) are matched to one another, irrespective of the expansion or contraction of the second CCD (14).
Abstract:
Film gate for a virtual contact scanner includes a base having a precision site adapted to receive a solid-state scanner assembly so as to position the sensor photosites at a precise spacing from the film image plane. A separate circuit board carrying control circuits for the scanner assembly is clamped over the scanner with contact terminals aligned with mating input/output terminals of the scanner assembly. Preferably the scanner terminals are aligned with open slots in the substrate and electrical contact is made between the scanner and circuit board terminals by means of compressible electrically conductive pads. Clamping force is concentrated over the region of electrical contact between the circuit board and scanner terminals to assure good electrical contact.
Abstract:
A mount for an optical device, such as a linear CCD array, is disclosed. The array is mounted on a base which is supported on a frame for adjustment relative thereto. The base is slidably movable on the frame for adjustment of the array in in-track and cross-track directions. The base is movable toward and away from the frame to provide a focus adjustment of the array. In order to provide a mount which can be easily and precisely adjusted to position the array along five degrees of freedom, adjustment screws are positioned such that the position of the array can be changed along one degree of freedom without changing the position of the array along any of the other degrees of freedom.
Abstract:
To provide a scanning head (10) suitable for scanning large-size documents, a plurality of contact type CCDs (12, 14, 16) are staggered on a common substrate (18) with overlapping end portions, so that their sensitive ranges (22, 24, 26) are adjoined to one another. The adjacent ends of two CCDs (12, 14) are fixed on the substrate by stops (28, 34), and the opposite ends of these CCDs are elastically supported to allow for thermal expansion or contraction. Between the first CCD (12) and the third CCD (16), a spacer (40) is interposed which has a thermal expansion coefficient comparable to that of the CCDs, so that the sensitive ranges (24, 26) of the second and third CCDs (14, 16) are matched to one another, irrespective of the expansion or contraction of the second CCD (14).