Provided is a light source device including a plurality of light emitting points arranged in matrix within a first cross section parallel to a first direction and a second direction. When light emitting points are projected within a second cross section parallel to first direction and a third direction perpendicular to first cross section, light emitting points have equal intervals between projections adjacent to each other. When light emitting points are projected within a third cross section parallel to second and third directions, light emitting points have equal intervals between projections adjacent to each other. An interval between light emitting points adjacent to each other in a row of matrix, an interval between light emitting points adjacent to each other in a column of matrix, an angle between row and column, an angle between column and first direction, and an angle between row and second direction are appropriately set.

A document scanning device is disclosed. For example, the document scanning device includes a platen glass, an optical scanner located below the platen glass, a plurality of light arrays located around a perimeter of the platen glass, and a processor communicatively coupled to the optical scanner and the plurality of light arrays, wherein the processor is to control a portion of the plurality of light arrays to define an origin and an orientation of a document for a scan job and control the optical scanner to scan the document on the platen glass.

An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

Systems and methods relate generally to exposure correction of an image transparency. In an example method thereof, an adaptable filter having an adjustable transparency panel and a microcontroller is obtained. The image transparency is backlit to obtain first analog image information by the adaptable filter. An exposure level associated with the first analog image information is sensed. A transparency level of the adjustable transparency panel is adjusted responsive to the sensed exposure level. Second analog image information is obtained from the adjustable transparency panel provided to a sensor array. The second analog image information is the first analog image information with the adjusted transparency level.

An outer peripheral member disposed at an outer periphery of a platen glass includes first and second reference surfaces. The first reference surface is a lower surface of an area extending along a side edge portion of the platen glass at an end in a main scanning direction. The second reference surface is located adjacent to the first reference surface in a second direction and differs in light reflectance from the first reference surface. An image processing portion determines whether outer periphery pixel data of an outer periphery area in line image data acquired successively while a scanning unit is moving, satisfies a border condition. A unit driving portion positions the scanning unit to a home position by moving the scanning unit a predetermined distance from where the scanning unit is located when it is determined that the outer periphery pixel data satisfies the border condition, and stops it.

A digital microform imaging apparatus includes a bracket movably coupled to a chassis. A microform media support is coupled to the bracket and includes a frame and a window supported by the frame. An illumination source is provided to direct light through the window of the microform media support along an optical axis. An optical sensor is positioned along the optical axis. A motor is operatively engaged with the microform media support to move the bracket and frame relative to the chassis along an axis perpendicular to the optical axis.

Provided is a light source device including a plurality of light emitting points arranged in matrix within a first cross section parallel to a first direction and a second direction. When light emitting points are projected within a second cross section parallel to first direction and a third direction perpendicular to first cross section, light emitting points have equal intervals between projections adjacent to each other. When light emitting points are projected within a third cross section parallel to second and third directions, light emitting points have equal intervals between projections adjacent to each other. An interval between light emitting points adjacent to each other in a row of matrix, an interval between light emitting points adjacent to each other in a column of matrix, an angle between row and column, an angle between column and first direction, and an angle between row and second direction are appropriately set.

An optical information reader includes a reflective member that reflects illumination light emitted from an illuminant toward a reading surface, and an image former ensured to present an imaging target held over the reading surface within an imaging region of an imager. The imaging region includes a first imaging region defined between the image former and the reading surface, and a second imaging region defined between the reading surface and the reflective member so as to be continuous to the first imaging region when light is internally reflected on the reading surface inside the housing. The reflective member is arranged outside the first imaging region, while the illuminant, the imager and the image former are arranged outside the second imaging region. The illuminant emits illumination light toward a reflecting surface of the reflective member in the second imaging region.

An image reading device includes light guides (5, 6) that emit light to an object to be read, a lens body (8) that condenses reflected light, a light receiver (13) that receives the reflected light, a sensor board (24) on which is mounted the light receiver (13), a lens holder (11), and a housing (9) that houses or holds these components. The lens holder (11) includes a holder bottom (11g), light guide positioners (11a, 11b) and lens body holders (11e, 11f). In the lens holder (11), the lens body (8) is attached between the lens body holders (11e, 11f), the sensor board (24) is attached to the holder bottom (11g) such that the light receiver (13) aligns with an optical axis of the lens body (8), and the light guides (5, 6) are attached to the light guide positioners (11a, 11b). A surface of each light guide positioner (11a, 11b) that faces the corresponding light guide (5, 6) to be attached has at least a portion having a same shape a s a shape of a surface of the light guide.

A carriage of an image reading apparatus includes a first lamp and a second lamp. A moving mechanism moves the carriage in a sub-scanning direction from a first side to a second side. The first lamp and the second lamp are arranged in a row in the sub-scanning direction. A control unit turns on any one of the first lamp and the second lamp during reading of one line. The control unit recognizes the position of a first-side edge based on first image data obtained when the first lamp is turned on. The control unit recognizes the position of a second-side edge based on second image data obtained when the second lamp is turned on. The control unit synthesizes the first image data and the second image data to generate job read image data.