Abstract:
An image reading device is provided that comprises: concave first lens mirrors (7) that are arranged in an array shape along a main scanning direction and that are adapted to collimate scattered light reflected by an irradiated object (1) and are adapted to reflect the scattered light as a substantially parallel bundle of rays that are angled in a sub-scanning direction; planar mirrors (8) that are adapted to reflect light from the first lens mirrors (7); apertures (9) that are arranged in an array shape and that allow light from the planar mirrors (8) to pass through by way of openings (10) that are arranged in an array shape and that are light-shielded therearound for selectively allowing light to pass through; concave second lens mirrors (11) that are arranged in an array shape into which light from the apertures (9) is incident and that are adapted to reflect the light from the apertures as converged light; and light receivers that have light receiving areas on which light from the second lens mirrors (11) is incident and that are adapted toform images that correspond to light from the openings.
Abstract:
A document scanner carriage (20) housing contains a pair of spaced mirrors (34,36) whose spacing and parallelism is precisely maintained by floating metal spacer plates (60,62) which are not affixed to the housing. Spaced springs (35) urge one of the mirrors (34,36) into engagement with the spacer plates (60,62), the other mirror(34,36) being referenced to the molded plastic housing (50). The parallel facing image plane sides of the mirrors (34,36) are substantially unobstructed by the spacer plates (60,62) which contact them thus allowing the scanner (10) to efficiently use a substantial proportion of the image planes of the mirrors (34,36) and occupy a comparatively small footprint. The floating spacer plates (60,62) and mirrors (34,36) are cushioned against shock and vibration by compressed elastomeric pads (80,81,82,83) on the underside of the housing cover (30) which allows the spacing and parallelism of the mirrors (34,36) to be maintained without direct affixation of the mirrors (34,36) or spacer plates (60,62) to the housing (50).
Abstract:
A scanner (10) includes a carriage unit (20) having a cover (30) with an elongated slot (26) and groove (25) for helping to define a document illumination area on a document (16) to be scanned. A flexible reflector (24) is disposed within the groove for reflecting non uniform light in a substantially uniform manner. A print screen (90) disposed on the reflector (24) controls the dispersion of light from the reflector and includes an elongated narrow reflective center portion (96) sandwiched between a pair of elongated non reflective center portions (92,94) and a pair of spaced apart reflective end portions (93,98).
Abstract:
In a system for scanning a document (43), a light source (22) illuminates the document; an imager (24, 41, 41', 61, 62) receives light from the document and directs it toward a detector array (25) which produces a corresponding array of electrical signals. The imager has several optical properties that are useful either individually or in combination. The imager is telecentric and thereby ensures that image size and magnification are insensitive to object displacement along the optical axis (46, 46') and image brightness is uniform independent of object off-axis distance. An aspheric element (33) within the imager balances focus variation (82-81-83) within the depth of field with spherical aberration and thereby provide nearly uniform image resolution. A diffraction pattern (33'), carried by the imager, corrects for spectral dispersion which occurs when light passes (63) from air into a refractive material (61, 62). An imager with a reflecting surface (32, 33) provides a system that is subject to little or no chromatic aberration. A solid imager (61, 62) with multiple internal reflecting surfaces (32, 33, 42) in optical series (32-33-32-42), configured to include the previously mentioned optical properties, also provides for highly stable alignment of reflecting surfaces.
Abstract:
An image reading device including: concave first lens mirrors that are arranged in an array shape along a main scanning direction and that collimate scattered light reflected by an irradiated object and reflect the scattered light as a substantially parallel bundle of rays that are angled in a sub-scanning direction; planar mirrors that reflect light from the first lens mirrors; apertures that are arranged in an array shape and that allow light from the planar mirrors to pass through by way of openings that are arranged in an array shape and that are light-shielded therearound for selectively allowing light to pass through; concave second lens mirrors that are arranged in an array shape into which light from the apertures is incident and that reflect the light from the apertures as converged light; and light receivers that have light receiving areas on which light from the second lens mirrors is incident and that form images that correspond to light from the openings.
Abstract:
A system includes a laser scanner system. The system includes a scanner laser to generate an optical scanning beam. The system also includes a spindle assembly comprising a spindle that extends along an axis and reflects the optical scanning beam. The system also includes a beam detector to receive the reflected optical scanning beam from the single facet and to indicate when to generate a latent image corresponding to an image based on the optical scanning beam for a given scan operation. The system further includes a scan controller to control the scanner laser such that the optical scanning beam is reflected from only a single facet of the spindle during the given scan operation.
Abstract:
An optical scanner includes a light source for projecting a light beam, a deflector for deflecting the light beam, a reflective member for reflecting the light beam toward a target, a contact member, and a pressing member. The reflective member includes a reflective plane and a rear plane opposite the reflective plane. The contact member contacts one of the rear plane of the reflective member and a first lateral plane perpendicular to the reflective plane to position the reflective member in place. The pressing member presses the reflective member against the contact member and includes a first pressing portion to press the reflective plane of the reflective member and a second pressing portion to press a ridge of the reflective member at which the reflective plane and a second lateral plane opposite the first lateral plane and perpendicular to the reflective plane of the reflective member meet.
Abstract:
A scanner comprising a platen positioned along a first plane and configured to support an article to be scanned; one or more illuminators positioned below the platen along a second plane parallel to the first plane, and configured to emit light beams; one or more mirrors positioned between the platen and the one or more illuminators, each of the mirrors being configured to direct a light beam having a directional component parallel to the first and second planes emitted by the illuminators onto the article on the platen at the imaging point; one or more sensors configured to detect the light reflecting off the article at the imaging point along a sensor optical path; and a carriage mechanism constructed to affect relative movement parallel to the first and second planes between platen, and the one or more illuminators and the one or more mirrors in a scanning direction.
Abstract:
A technique is provided which can improve optical characteristics by suppressing the occurrence of an error in attachment of a rotary deflector that deflects a light flux from a light source and scans it in a main scanning direction. There are provided a rotary deflector that deflects the light flux from the light source and scans it in the main scanning direction, an imaging optical system that images the light flux scanned by the rotary deflector onto a specified scanning object, a support part that supports the rotary deflector rotatably, and a positioning part that comes in contact with the support part at plural contact positions and positions the support part, in which a shortest distance between the plural contact positions in an optical axis direction of the imaging optical system is longer than a shortest distance between the plural contact positions in the main scanning direction.
Abstract:
A technique is provided which can improve optical characteristics by suppressing the occurrence of an error in attachment of a rotary deflector that deflects a light flux from a light source and scans it in a main scanning direction. There are provided a rotary deflector that deflects the light flux from the light source and scans it in the main scanning direction, an imaging optical system that images the light flux scanned by the rotary deflector onto a specified scanning object, a support part that supports the rotary deflector rotatably, and a positioning part that comes in contact with the support part at plural contact positions and positions the support part, in which a shortest distance between the plural contact positions in an optical axis direction of the imaging optical system is longer than a shortest distance between the plural contact positions in the main scanning direction.