The present disclosure relates to a portable scanner capable of increasing the precision of focus and a scanning method using the same. According to an embodiment of the present disclosure, the portable scanner, which generates a three dimensional (3D) image from a subject, includes a focus state output device to determine a present focus state with respect to a set focal length from a subject and to output the present focus state such that a user recognizes the present focus state.

A document camera which operates with electric power supplied via a USB cable includes: an image pickup unit which picks up an image of a subject via a lens; a light source unit which emits light toward the subject; a drive unit which drives the lens; a detection unit which detects an amount of current supplied via the USB cable; and a control unit which controls an operation of the light source unit and the drive unit according to the amount of current detected by the detection unit.

An image reading device includes reading devices arranged in a main scanning direction perpendicular to a sub-scanning direction, position reference members each including a reference pattern for correcting relative positions of pixels in each of the reading devices or relative positions of the reading devices, and circuitry. The reference members move in the sub-scanning direction relative to the reading devices, and include first reference members for correcting the relative positions of the reading devices and second reference members for correcting the relative positions of the pixels in each of the reading devices. While switching between the first reference members and the second reference members, the circuitry calculates a correction value for a deviation of the pixels in each of the reading devices and a correction value for a deviation of the reading devices based on a result of reading of the reference members.

An image reading device includes reading devices arranged in a main scanning direction perpendicular to a sub-scanning direction, position reference members each including a reference pattern for correcting relative positions of pixels in each of the reading devices or relative positions of the reading devices, and circuitry. The reference members move in the sub-scanning direction relative to the reading devices, and include first reference members for correcting the relative positions of the reading devices and second reference members for correcting the relative positions of the pixels in each of the reading devices. While switching between the first reference members and the second reference members, the circuitry calculates a correction value for a deviation of the pixels in each of the reading devices and a correction value for a deviation of the reading devices based on a result of reading of the reference members.

The present disclosure relates to a portable scanner capable of increasing the precision of focus and a scanning method using the same. According to an embodiment of the present disclosure, the portable scanner, which generates a three dimensional (3D) image from a subject, includes a focus state output device to determine a present focus state with respect to a set focal length from a subject and to output the present focus state such that a user recognizes the present focus state.

A light-emitting component includes an insulating substrate, plural light-emitting elements, and plural thyristors. The plural light-emitting elements are disposed on the substrate and constituted by a first stacked semiconductor layer, the first stacked semiconductor layer being obtained by stacking plural semiconductor layers. The plural thyristors are constituted by a second stacked semiconductor layer disposed on the substrate such that the light-emitting elements and the thyristors are arranged side by side, connected to the plural light-emitting elements, respectively, and turn on to drive the light-emitting elements to emit light or to increase an emitted light amount, the second stacked semiconductor layer being obtained by stacking plural semiconductor layers that are different from the semiconductor layers of the first stacked semiconductor layer.

A scanner has a first mirror having a plurality of concavities configured to reflect light from a document; and a sensor configured to detect light reflected by the concavity; the concavity having an optical characteristic that differs according to position.

Image scanning apparatus and method of operating an image scanning apparatus, the image scanning apparatus including a line scan detector and being configured to image a surface of an object mounted in the image scanning apparatus in a plurality of swathes, wherein each swathe is formed by a group of scan lines, each scan line being acquired using the scan line detector from a respective elongate region of the surface of the object extending in a scan width direction, wherein each group of scan lines is acquired whilst the object is moved relative to the scan line detector in a scan length direction.

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.

A flatbed scanner includes a flatbed document scanner body accommodating a transparent plate for supporting a physical document and a document cover, which includes a sheet member with an expanse covering at least a substantial area of the transparent plate. The rectangular document cover has an underside and a movable carriage extending across the rectangular transparent plate in a transverse direction. The movable carriage carries a camera or an optical system for a camera. The sheet member of the rectangular document cover is magnetic or carries one or more magnetic plates, so as to be magnetically attracted towards the movable carriage and exert a pressing force on the physical document when supported on the rectangular transparent plate. A compressing force is thereby applied to an original document resting at an area at which the movable carriage currently is located while scanning a line of the original document.