Abstract:
An optical scanner device for producing machine-readable data representative of an image of a scan line object, comprising: a light source for illuminating the scan line object; a lens assembly for focusing imaging light received from the scan line object on an image plane; at least one mirror having a planar mirror surface for reflectively directing imaging light from the scan line object into the lens assembly whereby a folded imaging light path extending between the scan line object and the lens assembly is provided; and an occluding aperture stop positioned in immediately adjacent, overlying relationship with the mirror surface for selectively differentially blocking light in the light path emanating from different points across the scan line object for adjusting the light intensity of the image produced on the image plane whereby blocking of light with the occluding aperture stop at more than one location along the folded imaging light path is obviated. Alternative embodiments utilizing a gradient filter and a shaped mirror surface are also disclosed.
Abstract:
An electro-optical imaging system uses a charge-coupled bucket-brigade photo-sensitive image convertor where the necessity for light shielded shift registers and other measures for preventing the acquisition of additional incident-light induced charge by light-representative electrical charge packets as they pass to the output port of the convertor is removed by the use of a liquid crystal light transmission cell which can be made transparent for the acquisition of charge by the convertor and opaque for the shifting of the charges to the output port. The convertor can thus be made simpler and of smaller area to give a lower cost and higher production yield. The convertor is given an apparently increased spatial resolution by providing that the cell allows sub-areas of the total image to be transmitted one-by-one to the convertor by the sequential operation of four sub-cells of the main cell such that each sub-cell becomes transparent and has its through-passing image converted in turn.
Abstract:
A raster input scanner (RIS) comprising a platen and light source, doubling mirror, lens and two CCD arrays for producing a bit stream output with twice the resolution produceable with a single CCD is disclosed. The doubling mirror is between the platen and lens, and produces two beams separated by a small angle. The lens focuses these beams as two lines at the image plane, where half of each intersects each CCD array. Glass plates, each intersecting and perpendicular to each beam, and rotatable about orthogonal axes, provide horizontal and vertical fine tuning.
Abstract:
A document reading unit includes an R light source, a G light source, a B light source, a UV light source, a lighting control unit, a first photoelectric conversion element, a second photoelectric conversion element, a lens, and an output unit. The first photoelectric conversion element includes an M filter. The second photoelectric conversion element includes a G filter. The output unit outputs outputs of the first photoelectric conversion element and the second photoelectric conversion element at the time of simultaneous lighting of the R and G light sources and an output of the first photoelectric conversion element at the time of simultaneous lighting of the B and UV light sources as the image data, and outputs an output of the second photoelectric conversion element at the time of simultaneous lighting of the B and UV light source as fluorescent color data indicating a fluorescent color region.
Abstract:
Selected embodiments use a relatively small image detector and a scanning mirror to obtain effective performance of a larger image detector. An imager with folded optics captures images of different field positions of a field of view (FOV), and stitches the images together for a larger image of the FOV. The stitched image is processed to identify portions of interest within the larger image, for example, using a cuing algorithm. The portions of interest are scanned again to capture enhanced quality images using, for example, longer dwell time for enhanced contrast. Another image of the FOV or a part of the FOV is stitched together using the enhanced quality images.
Abstract:
An illumination apparatus includes: a rod-like light guide member that directs light emitted from a first light source and a second light source from an emission surface to an illuminated body while propagating the light by reflection surfaces; and a light blocking member including a second surrounding portion slidably covering another end of the light guide member, wherein the second surrounding portion includes: a light blocking portion protruding toward one end of the light guide member and covering the emission surface of the light guide member; and a cut-out portion adjacent to the light blocking portion and exposing the reflection surface of the light guide member.
Abstract:
An image reading optical system, including: an imaging optical system used for imaging a slit area of a document and includes an optical element having different cross section shapes in a main scanning direction and in a sub-scanning direction; an aperture stop; and an optical phase changing filter disposed adjacent to the aperture stop and including a phase lead area and a phase delay area, in which the optical phase changing filter includes a surface shape component that is symmetric only with respect to a predetermined plane including a surface normal at the center of the incident beam and one of the main scanning direction and the sub-scanning direction, and with respect to a surface that includes the surface normal at the center of the incident beam and is perpendicular to the predetermined plane, one side is the phase lead area, and another side is the phase delay area.
Abstract:
An image reader includes a light source, a light reception element, an optical member, and a hold body. The light source applies light to a document. The light reception element receives reflected light reflected by the document. The optical member introduces the reflected light into the light reception element. The hold body has an entry part which is disposed in a portion not contributing to image formation of the reflected light on the light reception element through the optical member. The hold body holds the optical member.
Abstract:
A data conversion system for converting data outputted from an information processor into data in a different format in real time while preventing any defect of an image such as frame missing or frame repetition of moving image data by synchronizing data transfer with converted data output. One of first and second nodes on an IEEE1394 bus functions as a cycle master, and first data is transferred from the first node to the second node in synchronism with a cycle start packet outputted from the cycle master. Second data generated by converting the first data by the second node is outputted in synchronism with a reference signal inputted from outside. The system comprises an external synchronizing signal receiving section provided at least in one of the first and second nodes and adapted to receive the reference signal inputted from outside and a synchronism control section for synchronizing the frequency of a cycle start packet outputted from the cycle master with the reference signal received by the external synchronizing signal receiving section.
Abstract:
An image reader includes a light source, a light reception element, an optical member, and a hold body. The light source applies light to a document. The light reception element receives reflected light reflected by the document. The optical member introduces the reflected light into the light reception element. The hold body has an entry part which is disposed in a portion not contributing to image formation of the reflected light on the light reception element through the optical member. The hold body holds the optical member.